/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 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:06:11,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:06:11,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:06:11,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:06:11,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-06 00:06:11,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:06:11,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:06:11,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:06:11,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:06:11,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:06:11,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:06:11,666 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:06:11,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:06:11,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:06:11,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:06:11,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:06:11,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:06:11,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:06:11,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:06:11,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:06:11,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:06:11,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:06:11,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:06:11,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:06:11,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:06:11,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:06:11,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:06:11,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:06:11,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:06:11,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:06:11,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:06:11,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:06:11,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:06:11,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:06:11,670 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:06:11,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:06:11,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:06:11,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:06:11,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:06:12,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:06:12,002 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:06:12,003 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:06:12,004 INFO L432 ainManager$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 [2021-06-06 00:06:12,004 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' [2021-06-06 00:06:12,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:06:12,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:06:12,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:06:12,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:06:12,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:06:12,043 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,050 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:06:12,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:06:12,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:06:12,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:06:12,068 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,068 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,069 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,069 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,073 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,076 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,077 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 06.06 12:06:12" (1/1) ... [2021-06-06 00:06:12,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:06:12,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:06:12,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:06:12,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:06:12,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:06:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:06:12,149 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:06:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:06:12,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:06:12,150 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:06:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:06:12,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:06:12,151 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:06:12,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:06:12,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:06:12,151 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:06:12,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:06:12,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:06:12,152 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:06:12,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:06:12,395 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:06:12,396 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:06:12 BoogieIcfgContainer [2021-06-06 00:06:12,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:06:12,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:06:12,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:06:12,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:06:12,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:06:12" (1/2) ... [2021-06-06 00:06:12,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a339013 and model type min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:06:12, skipping insertion in model container [2021-06-06 00:06:12,401 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 06.06 12:06:12" (2/2) ... [2021-06-06 00:06:12,402 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array-hom.wvr.bpl [2021-06-06 00:06:12,407 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:06:12,407 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:06:12,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:06:12,408 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:06:12,435 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 00:06:12,452 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-06 00:06:12,476 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:06:12,492 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:06:12,493 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:06:12,493 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:06:12,493 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:06:12,493 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:06:12,493 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:06:12,493 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:06:12,501 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-06 00:06:12,550 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) [2021-06-06 00:06:12,553 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) [2021-06-06 00:06:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-06 00:06:12,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:12,560 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:12,560 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-06 00:06:12,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648533646] [2021-06-06 00:06:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:12,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:12,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648533646] [2021-06-06 00:06:12,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648533646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:06:12,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:06:12,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:06:12,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219343114] [2021-06-06 00:06:12,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:06:12,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:06:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:06:12,807 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) [2021-06-06 00:06:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:12,857 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-06 00:06:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:06:12,859 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 [2021-06-06 00:06:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:12,870 INFO L225 Difference]: With dead ends: 217 [2021-06-06 00:06:12,870 INFO L226 Difference]: Without dead ends: 202 [2021-06-06 00:06:12,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:06:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-06 00:06:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-06 00:06:12,911 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) [2021-06-06 00:06:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-06 00:06:12,914 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-06 00:06:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:12,915 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-06 00:06:12,915 INFO L483 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) [2021-06-06 00:06:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-06 00:06:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:06:12,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:12,917 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:12,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:06:12,917 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-06 00:06:12,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:12,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828822905] [2021-06-06 00:06:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:12,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:12,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828822905] [2021-06-06 00:06:12,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828822905] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:06:12,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:06:12,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:06:12,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119600641] [2021-06-06 00:06:12,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:06:12,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:12,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:06:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:06:12,961 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) [2021-06-06 00:06:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:12,996 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-06 00:06:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:06:12,997 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 [2021-06-06 00:06:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:12,998 INFO L225 Difference]: With dead ends: 158 [2021-06-06 00:06:12,998 INFO L226 Difference]: Without dead ends: 158 [2021-06-06 00:06:12,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:06:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-06 00:06:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-06 00:06:13,011 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) [2021-06-06 00:06:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-06 00:06:13,012 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-06 00:06:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:13,012 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-06 00:06:13,013 INFO L483 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) [2021-06-06 00:06:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-06 00:06:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:06:13,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:13,014 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:13,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:06:13,015 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-06-06 00:06:13,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:13,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323560038] [2021-06-06 00:06:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:13,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:13,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323560038] [2021-06-06 00:06:13,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323560038] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:06:13,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:06:13,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:06:13,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615366049] [2021-06-06 00:06:13,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:06:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:06:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:06:13,057 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) [2021-06-06 00:06:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:13,120 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-06 00:06:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:06:13,124 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 [2021-06-06 00:06:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:13,125 INFO L225 Difference]: With dead ends: 183 [2021-06-06 00:06:13,125 INFO L226 Difference]: Without dead ends: 183 [2021-06-06 00:06:13,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:06:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-06 00:06:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-06 00:06:13,139 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) [2021-06-06 00:06:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-06 00:06:13,145 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-06 00:06:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:13,147 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-06 00:06:13,147 INFO L483 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) [2021-06-06 00:06:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-06 00:06:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:06:13,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:13,153 INFO L554 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] [2021-06-06 00:06:13,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:06:13,154 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-06 00:06:13,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:13,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387121897] [2021-06-06 00:06:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:13,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387121897] [2021-06-06 00:06:13,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387121897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462456139] [2021-06-06 00:06:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:06:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:14,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-06 00:06:14,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:14,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:14,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:06:14,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:14,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:14,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:06:14,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:14,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:14,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:06:14,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:97, output treesize:21 [2021-06-06 00:06:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:14,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462456139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:14,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:14,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:06:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976963566] [2021-06-06 00:06:14,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:14,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:14,335 INFO L87 Difference]: Start difference. First operand 158 states and 448 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) [2021-06-06 00:06:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:14,582 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-06 00:06:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:06:14,583 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 [2021-06-06 00:06:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:14,586 INFO L225 Difference]: With dead ends: 330 [2021-06-06 00:06:14,586 INFO L226 Difference]: Without dead ends: 315 [2021-06-06 00:06:14,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-06 00:06:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-06 00:06:14,600 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) [2021-06-06 00:06:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-06 00:06:14,602 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-06 00:06:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:14,603 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-06 00:06:14,603 INFO L483 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) [2021-06-06 00:06:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-06 00:06:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:06:14,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:14,605 INFO L554 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] [2021-06-06 00:06:14,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:14,821 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-06 00:06:14,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:14,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84497239] [2021-06-06 00:06:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:15,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:15,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84497239] [2021-06-06 00:06:15,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84497239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:15,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928310478] [2021-06-06 00:06:15,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:15,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:15,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:15,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:06:15,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:15,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-06 00:06:15,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,455 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:15,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-06 00:06:15,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,471 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-06 00:06:15,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:15,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:06:15,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:15,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:06:15,585 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-06-06 00:06:15,707 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-06-06 00:06:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:15,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928310478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:15,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:15,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-06 00:06:15,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177100205] [2021-06-06 00:06:15,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:06:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:06:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:06:15,790 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) [2021-06-06 00:06:16,235 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-06-06 00:06:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:16,402 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-06 00:06:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:06:16,406 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 [2021-06-06 00:06:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:16,408 INFO L225 Difference]: With dead ends: 374 [2021-06-06 00:06:16,408 INFO L226 Difference]: Without dead ends: 359 [2021-06-06 00:06:16,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 824.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:06:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-06 00:06:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-06 00:06:16,418 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) [2021-06-06 00:06:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-06 00:06:16,419 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-06 00:06:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:16,419 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-06 00:06:16,419 INFO L483 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) [2021-06-06 00:06:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-06 00:06:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:06:16,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:16,420 INFO L554 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] [2021-06-06 00:06:16,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-06 00:06:16,637 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-06 00:06:16,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:16,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886925957] [2021-06-06 00:06:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:16,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:16,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886925957] [2021-06-06 00:06:16,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886925957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:16,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103604188] [2021-06-06 00:06:16,890 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 [2021-06-06 00:06:16,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:06:16,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:16,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:06:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:17,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:17,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:17,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:06:17,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:17,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:17,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-06 00:06:17,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:17,210 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-06-06 00:06:17,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:17,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2021-06-06 00:06:17,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:17,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:17,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:06:17,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-06-06 00:06:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:17,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103604188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:17,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:17,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:06:17,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754302625] [2021-06-06 00:06:17,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:17,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:17,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:17,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:17,297 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) [2021-06-06 00:06:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:17,537 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-06 00:06:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:06:17,537 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 [2021-06-06 00:06:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:17,539 INFO L225 Difference]: With dead ends: 296 [2021-06-06 00:06:17,539 INFO L226 Difference]: Without dead ends: 281 [2021-06-06 00:06:17,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:06:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-06 00:06:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-06 00:06:17,549 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) [2021-06-06 00:06:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-06 00:06:17,550 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-06 00:06:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:17,551 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-06 00:06:17,551 INFO L483 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) [2021-06-06 00:06:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-06 00:06:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:06:17,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:17,552 INFO L554 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] [2021-06-06 00:06:17,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:06:17,765 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-06 00:06:17,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:17,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970020817] [2021-06-06 00:06:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:17,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970020817] [2021-06-06 00:06:17,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970020817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239252320] [2021-06-06 00:06:17,975 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 [2021-06-06 00:06:18,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:06:18,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:18,212 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:18,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-06 00:06:18,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:18,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:18,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-06 00:06:18,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:18,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:18,308 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:18,308 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 [2021-06-06 00:06:18,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:18,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:18,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-06 00:06:18,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:18,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:18,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:06:18,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:98 [2021-06-06 00:06:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:18,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239252320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:18,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:18,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:06:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287374146] [2021-06-06 00:06:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:18,554 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:18,926 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-06-06 00:06:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:06:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-06-06 00:06:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:18,929 INFO L225 Difference]: With dead ends: 409 [2021-06-06 00:06:18,929 INFO L226 Difference]: Without dead ends: 394 [2021-06-06 00:06:18,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:06:18,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-06 00:06:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-06-06 00:06:18,936 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) [2021-06-06 00:06:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-06 00:06:18,937 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-06 00:06:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:18,937 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-06 00:06:18,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-06 00:06:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:18,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:18,939 INFO L554 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] [2021-06-06 00:06:19,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:19,153 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-06 00:06:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:19,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997839527] [2021-06-06 00:06:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:19,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997839527] [2021-06-06 00:06:19,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997839527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326047720] [2021-06-06 00:06:19,210 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 [2021-06-06 00:06:19,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:06:19,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:19,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:19,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326047720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:19,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:19,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:06:19,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810870384] [2021-06-06 00:06:19,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:19,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:19,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:19,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:19,359 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) [2021-06-06 00:06:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:19,782 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-06 00:06:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:06:19,783 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 [2021-06-06 00:06:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:19,786 INFO L225 Difference]: With dead ends: 619 [2021-06-06 00:06:19,786 INFO L226 Difference]: Without dead ends: 619 [2021-06-06 00:06:19,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:06:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-06 00:06:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-06 00:06:19,795 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) [2021-06-06 00:06:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-06 00:06:19,796 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-06 00:06:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:19,796 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-06 00:06:19,796 INFO L483 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) [2021-06-06 00:06:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-06 00:06:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:19,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:19,798 INFO L554 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] [2021-06-06 00:06:20,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-06 00:06:20,013 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:20,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-06 00:06:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809450740] [2021-06-06 00:06:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:20,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:20,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809450740] [2021-06-06 00:06:20,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809450740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:20,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255804090] [2021-06-06 00:06:20,059 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 [2021-06-06 00:06:20,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:20,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255804090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:20,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:20,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941621424] [2021-06-06 00:06:20,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:20,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:20,190 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) [2021-06-06 00:06:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:21,013 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-06 00:06:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:06:21,013 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 [2021-06-06 00:06:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:21,018 INFO L225 Difference]: With dead ends: 1078 [2021-06-06 00:06:21,018 INFO L226 Difference]: Without dead ends: 1078 [2021-06-06 00:06:21,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 510.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:06:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-06 00:06:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-06 00:06:21,030 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) [2021-06-06 00:06:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-06 00:06:21,031 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-06 00:06:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:21,032 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-06 00:06:21,032 INFO L483 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) [2021-06-06 00:06:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-06 00:06:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:21,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:21,033 INFO L554 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] [2021-06-06 00:06:21,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:21,258 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-06 00:06:21,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:21,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942009609] [2021-06-06 00:06:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:21,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:21,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942009609] [2021-06-06 00:06:21,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942009609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:21,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166483853] [2021-06-06 00:06:21,310 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:21,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:21,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:21,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166483853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:21,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:21,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:21,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312915206] [2021-06-06 00:06:21,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:21,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:21,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:21,443 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) [2021-06-06 00:06:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:22,138 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-06 00:06:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:06:22,139 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 [2021-06-06 00:06:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:22,143 INFO L225 Difference]: With dead ends: 951 [2021-06-06 00:06:22,143 INFO L226 Difference]: Without dead ends: 951 [2021-06-06 00:06:22,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:06:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-06 00:06:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-06 00:06:22,155 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) [2021-06-06 00:06:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-06 00:06:22,156 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-06 00:06:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:22,157 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-06 00:06:22,157 INFO L483 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) [2021-06-06 00:06:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-06 00:06:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:22,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:22,158 INFO L554 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] [2021-06-06 00:06:22,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:22,365 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:22,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-06 00:06:22,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:22,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616693381] [2021-06-06 00:06:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:22,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616693381] [2021-06-06 00:06:22,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616693381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378429355] [2021-06-06 00:06:22,400 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 [2021-06-06 00:06:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:06:22,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:22,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378429355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:22,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:22,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:06:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779961927] [2021-06-06 00:06:22,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:06:22,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:06:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:06:22,501 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) [2021-06-06 00:06:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:22,615 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-06 00:06:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:06:22,615 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 [2021-06-06 00:06:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:22,618 INFO L225 Difference]: With dead ends: 669 [2021-06-06 00:06:22,619 INFO L226 Difference]: Without dead ends: 663 [2021-06-06 00:06:22,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-06 00:06:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-06 00:06:22,629 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) [2021-06-06 00:06:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-06 00:06:22,630 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-06 00:06:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:22,631 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-06 00:06:22,631 INFO L483 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) [2021-06-06 00:06:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-06 00:06:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:22,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:22,632 INFO L554 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] [2021-06-06 00:06:22,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-06 00:06:22,855 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-06 00:06:22,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:22,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258962545] [2021-06-06 00:06:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:22,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258962545] [2021-06-06 00:06:22,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258962545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789032125] [2021-06-06 00:06:22,899 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 [2021-06-06 00:06:22,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:23,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789032125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:23,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:23,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:06:23,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151166196] [2021-06-06 00:06:23,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:23,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:23,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:23,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:23,028 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) [2021-06-06 00:06:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:23,190 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-06 00:06:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:06:23,190 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 [2021-06-06 00:06:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:23,193 INFO L225 Difference]: With dead ends: 710 [2021-06-06 00:06:23,193 INFO L226 Difference]: Without dead ends: 672 [2021-06-06 00:06:23,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:06:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-06 00:06:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-06 00:06:23,205 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) [2021-06-06 00:06:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-06 00:06:23,206 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-06 00:06:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:23,207 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-06 00:06:23,207 INFO L483 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) [2021-06-06 00:06:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-06 00:06:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:23,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:23,208 INFO L554 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] [2021-06-06 00:06:23,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:23,425 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:23,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-06 00:06:23,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:23,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690117537] [2021-06-06 00:06:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:23,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690117537] [2021-06-06 00:06:23,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690117537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078647485] [2021-06-06 00:06:23,459 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 [2021-06-06 00:06:23,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:23,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:23,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:06:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:23,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078647485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:23,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:23,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:06:23,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38825901] [2021-06-06 00:06:23,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:06:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:06:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:06:23,551 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) [2021-06-06 00:06:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:23,658 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-06 00:06:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:06:23,689 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 [2021-06-06 00:06:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:23,694 INFO L225 Difference]: With dead ends: 830 [2021-06-06 00:06:23,694 INFO L226 Difference]: Without dead ends: 830 [2021-06-06 00:06:23,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-06 00:06:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-06 00:06:23,710 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) [2021-06-06 00:06:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-06 00:06:23,712 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-06 00:06:23,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:23,712 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-06 00:06:23,712 INFO L483 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) [2021-06-06 00:06:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-06 00:06:23,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:23,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:23,713 INFO L554 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] [2021-06-06 00:06:23,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:23,936 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-06 00:06:23,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:23,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499462205] [2021-06-06 00:06:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:23,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499462205] [2021-06-06 00:06:23,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499462205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100613028] [2021-06-06 00:06:23,976 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 [2021-06-06 00:06:24,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:06:24,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:24,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100613028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:24,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:24,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:06:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548186441] [2021-06-06 00:06:24,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:06:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:24,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:06:24,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:06:24,105 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) [2021-06-06 00:06:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:24,397 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-06 00:06:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:06:24,398 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 [2021-06-06 00:06:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:24,403 INFO L225 Difference]: With dead ends: 1196 [2021-06-06 00:06:24,403 INFO L226 Difference]: Without dead ends: 1196 [2021-06-06 00:06:24,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:06:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-06 00:06:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-06 00:06:24,420 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) [2021-06-06 00:06:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-06 00:06:24,422 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-06 00:06:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:24,422 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-06 00:06:24,422 INFO L483 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) [2021-06-06 00:06:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-06 00:06:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:24,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:24,424 INFO L554 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] [2021-06-06 00:06:24,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-06 00:06:24,647 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-06 00:06:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:24,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10627352] [2021-06-06 00:06:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:24,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:24,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10627352] [2021-06-06 00:06:24,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10627352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:24,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397741731] [2021-06-06 00:06:24,689 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 [2021-06-06 00:06:24,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:24,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:24,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397741731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:24,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:24,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:06:24,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936127] [2021-06-06 00:06:24,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:06:24,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:06:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:06:24,825 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) [2021-06-06 00:06:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:25,271 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-06 00:06:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:06:25,271 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 [2021-06-06 00:06:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:25,278 INFO L225 Difference]: With dead ends: 1492 [2021-06-06 00:06:25,278 INFO L226 Difference]: Without dead ends: 1492 [2021-06-06 00:06:25,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:06:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-06 00:06:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-06 00:06:25,298 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) [2021-06-06 00:06:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-06 00:06:25,300 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-06 00:06:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:25,300 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-06 00:06:25,300 INFO L483 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) [2021-06-06 00:06:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-06 00:06:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:25,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:25,302 INFO L554 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] [2021-06-06 00:06:25,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-06 00:06:25,525 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-06 00:06:25,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:25,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819118639] [2021-06-06 00:06:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:25,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819118639] [2021-06-06 00:06:25,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819118639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206675343] [2021-06-06 00:06:25,578 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 [2021-06-06 00:06:25,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:25,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:25,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:25,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206675343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:25,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:25,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:06:25,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536102552] [2021-06-06 00:06:25,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:25,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:25,691 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) [2021-06-06 00:06:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:25,946 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-06 00:06:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:06:25,947 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 [2021-06-06 00:06:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:25,952 INFO L225 Difference]: With dead ends: 1258 [2021-06-06 00:06:25,953 INFO L226 Difference]: Without dead ends: 1248 [2021-06-06 00:06:25,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:06:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-06 00:06:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-06 00:06:25,972 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) [2021-06-06 00:06:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-06 00:06:25,974 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-06 00:06:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:25,974 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-06 00:06:25,975 INFO L483 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) [2021-06-06 00:06:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-06 00:06:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:25,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:25,977 INFO L554 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] [2021-06-06 00:06:26,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-06 00:06:26,200 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:26,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-06 00:06:26,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:26,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572103211] [2021-06-06 00:06:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:26,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572103211] [2021-06-06 00:06:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572103211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936227170] [2021-06-06 00:06:26,244 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:26,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:26,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:26,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936227170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:26,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:26,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:06:26,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248234403] [2021-06-06 00:06:26,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:26,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:26,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:26,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:26,370 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) [2021-06-06 00:06:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:26,654 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-06 00:06:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:06:26,655 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 [2021-06-06 00:06:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:26,659 INFO L225 Difference]: With dead ends: 1329 [2021-06-06 00:06:26,659 INFO L226 Difference]: Without dead ends: 1329 [2021-06-06 00:06:26,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:06:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-06 00:06:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-06 00:06:26,676 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) [2021-06-06 00:06:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-06 00:06:26,678 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-06 00:06:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:26,679 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-06 00:06:26,679 INFO L483 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) [2021-06-06 00:06:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-06 00:06:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:26,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:26,681 INFO L554 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] [2021-06-06 00:06:26,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:26,893 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-06 00:06:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:26,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583059273] [2021-06-06 00:06:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:26,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583059273] [2021-06-06 00:06:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583059273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137053729] [2021-06-06 00:06:26,937 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 [2021-06-06 00:06:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:27,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137053729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:27,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:27,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:06:27,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799306492] [2021-06-06 00:06:27,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:06:27,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:27,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:06:27,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:06:27,028 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) [2021-06-06 00:06:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:27,411 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-06 00:06:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:06:27,412 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 [2021-06-06 00:06:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:27,418 INFO L225 Difference]: With dead ends: 1548 [2021-06-06 00:06:27,418 INFO L226 Difference]: Without dead ends: 1544 [2021-06-06 00:06:27,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:06:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-06 00:06:27,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-06 00:06:27,438 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) [2021-06-06 00:06:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-06 00:06:27,440 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-06 00:06:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:27,440 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-06 00:06:27,440 INFO L483 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) [2021-06-06 00:06:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-06 00:06:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:27,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:27,442 INFO L554 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] [2021-06-06 00:06:27,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:27,657 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-06 00:06:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:27,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140626936] [2021-06-06 00:06:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:27,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140626936] [2021-06-06 00:06:27,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140626936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806148988] [2021-06-06 00:06:27,699 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 [2021-06-06 00:06:27,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:27,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:27,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806148988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:27,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:27,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:27,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004550826] [2021-06-06 00:06:27,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:27,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:27,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:27,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:27,833 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) [2021-06-06 00:06:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:28,609 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-06 00:06:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:06:28,609 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 [2021-06-06 00:06:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:28,621 INFO L225 Difference]: With dead ends: 2734 [2021-06-06 00:06:28,621 INFO L226 Difference]: Without dead ends: 2734 [2021-06-06 00:06:28,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:06:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-06 00:06:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-06 00:06:28,653 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) [2021-06-06 00:06:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-06 00:06:28,656 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-06 00:06:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:28,656 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-06 00:06:28,656 INFO L483 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) [2021-06-06 00:06:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-06 00:06:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:28,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:28,658 INFO L554 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] [2021-06-06 00:06:28,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:28,861 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-06 00:06:28,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:28,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370689527] [2021-06-06 00:06:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:28,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:28,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370689527] [2021-06-06 00:06:28,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370689527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:28,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348096810] [2021-06-06 00:06:28,917 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 [2021-06-06 00:06:28,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:06:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348096810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:29,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:29,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4236355] [2021-06-06 00:06:29,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:29,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:29,040 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) [2021-06-06 00:06:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:29,723 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-06 00:06:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:06:29,723 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 [2021-06-06 00:06:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:29,730 INFO L225 Difference]: With dead ends: 2693 [2021-06-06 00:06:29,730 INFO L226 Difference]: Without dead ends: 2693 [2021-06-06 00:06:29,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 441.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:06:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-06 00:06:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-06 00:06:29,761 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) [2021-06-06 00:06:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-06 00:06:29,764 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-06 00:06:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:29,764 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-06 00:06:29,764 INFO L483 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) [2021-06-06 00:06:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-06 00:06:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:29,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:29,766 INFO L554 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] [2021-06-06 00:06:29,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-06 00:06:29,987 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:29,988 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-06 00:06:29,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:29,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489795781] [2021-06-06 00:06:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:30,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:30,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489795781] [2021-06-06 00:06:30,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489795781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:30,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183203982] [2021-06-06 00:06:30,030 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 [2021-06-06 00:06:30,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:30,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:30,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:30,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183203982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:30,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:30,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:06:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042473395] [2021-06-06 00:06:30,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:30,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:30,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:30,163 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) [2021-06-06 00:06:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:30,768 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-06 00:06:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:06:30,769 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 [2021-06-06 00:06:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:30,775 INFO L225 Difference]: With dead ends: 2677 [2021-06-06 00:06:30,775 INFO L226 Difference]: Without dead ends: 2677 [2021-06-06 00:06:30,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:06:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-06 00:06:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-06 00:06:30,803 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) [2021-06-06 00:06:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-06 00:06:30,806 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-06 00:06:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:30,806 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-06 00:06:30,806 INFO L483 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) [2021-06-06 00:06:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-06 00:06:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:30,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:30,808 INFO L554 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] [2021-06-06 00:06:31,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-06 00:06:31,029 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-06 00:06:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:31,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034591720] [2021-06-06 00:06:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:31,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:31,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034591720] [2021-06-06 00:06:31,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034591720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:31,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347376848] [2021-06-06 00:06:31,075 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:31,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:06:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:31,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347376848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:31,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:31,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:06:31,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462112160] [2021-06-06 00:06:31,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:31,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:31,187 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) [2021-06-06 00:06:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:31,729 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-06 00:06:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:06:31,729 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 [2021-06-06 00:06:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:31,734 INFO L225 Difference]: With dead ends: 2474 [2021-06-06 00:06:31,735 INFO L226 Difference]: Without dead ends: 2470 [2021-06-06 00:06:31,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:06:31,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-06 00:06:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-06 00:06:31,764 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) [2021-06-06 00:06:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-06 00:06:31,766 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-06 00:06:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:31,767 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-06 00:06:31,767 INFO L483 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) [2021-06-06 00:06:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-06 00:06:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:31,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:31,768 INFO L554 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] [2021-06-06 00:06:31,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-06 00:06:31,989 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-06 00:06:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:31,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099204249] [2021-06-06 00:06:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:32,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:32,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099204249] [2021-06-06 00:06:32,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099204249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:32,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53050863] [2021-06-06 00:06:32,028 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 [2021-06-06 00:06:32,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:06:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:32,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:32,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53050863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:32,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:32,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:32,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134845204] [2021-06-06 00:06:32,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:32,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:32,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:32,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:32,151 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) [2021-06-06 00:06:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:32,800 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-06 00:06:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:06:32,800 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 [2021-06-06 00:06:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:32,806 INFO L225 Difference]: With dead ends: 2514 [2021-06-06 00:06:32,806 INFO L226 Difference]: Without dead ends: 2514 [2021-06-06 00:06:32,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:06:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-06 00:06:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-06 00:06:32,833 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) [2021-06-06 00:06:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-06 00:06:32,836 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-06 00:06:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:32,836 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-06 00:06:32,836 INFO L483 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) [2021-06-06 00:06:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-06 00:06:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:32,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:32,838 INFO L554 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] [2021-06-06 00:06:33,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-06 00:06:33,053 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-06 00:06:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:33,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151921869] [2021-06-06 00:06:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:33,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:33,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151921869] [2021-06-06 00:06:33,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151921869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:33,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931832041] [2021-06-06 00:06:33,093 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:33,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:33,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931832041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:33,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:33,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:33,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53496501] [2021-06-06 00:06:33,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:33,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:33,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:33,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:33,208 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) [2021-06-06 00:06:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:33,840 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-06 00:06:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:06:33,840 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 [2021-06-06 00:06:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:33,846 INFO L225 Difference]: With dead ends: 2332 [2021-06-06 00:06:33,846 INFO L226 Difference]: Without dead ends: 2328 [2021-06-06 00:06:33,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 372.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:06:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-06 00:06:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-06 00:06:33,874 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) [2021-06-06 00:06:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-06 00:06:33,876 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-06 00:06:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:33,877 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-06 00:06:33,877 INFO L483 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) [2021-06-06 00:06:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-06 00:06:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:33,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:33,878 INFO L554 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] [2021-06-06 00:06:34,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-06 00:06:34,100 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-06 00:06:34,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:34,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650308898] [2021-06-06 00:06:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:34,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:34,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650308898] [2021-06-06 00:06:34,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650308898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:34,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215876690] [2021-06-06 00:06:34,130 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:34,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:06:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:06:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:34,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215876690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:34,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:34,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:06:34,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148514972] [2021-06-06 00:06:34,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:06:34,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:34,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:06:34,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:06:34,219 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) [2021-06-06 00:06:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:34,312 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-06 00:06:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:06:34,312 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 [2021-06-06 00:06:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:34,315 INFO L225 Difference]: With dead ends: 929 [2021-06-06 00:06:34,315 INFO L226 Difference]: Without dead ends: 929 [2021-06-06 00:06:34,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-06 00:06:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-06 00:06:34,351 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) [2021-06-06 00:06:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-06 00:06:34,354 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-06 00:06:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:34,354 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-06 00:06:34,354 INFO L483 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) [2021-06-06 00:06:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-06 00:06:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:34,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:34,356 INFO L554 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] [2021-06-06 00:06:34,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:34,579 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:34,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-06 00:06:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:34,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961596227] [2021-06-06 00:06:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:34,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:34,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961596227] [2021-06-06 00:06:34,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961596227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:34,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294169244] [2021-06-06 00:06:34,620 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 [2021-06-06 00:06:34,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:34,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:34,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294169244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:34,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:34,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:06:34,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685853818] [2021-06-06 00:06:34,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:06:34,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:34,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:06:34,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:06:34,717 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) [2021-06-06 00:06:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:35,025 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-06 00:06:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:06:35,026 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 [2021-06-06 00:06:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:35,028 INFO L225 Difference]: With dead ends: 1555 [2021-06-06 00:06:35,028 INFO L226 Difference]: Without dead ends: 1555 [2021-06-06 00:06:35,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:06:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-06 00:06:35,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-06 00:06:35,046 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) [2021-06-06 00:06:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-06 00:06:35,048 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-06 00:06:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:35,049 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-06 00:06:35,049 INFO L483 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) [2021-06-06 00:06:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-06 00:06:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:35,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:35,050 INFO L554 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] [2021-06-06 00:06:35,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:35,265 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-06 00:06:35,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:35,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497327251] [2021-06-06 00:06:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:35,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:35,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497327251] [2021-06-06 00:06:35,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497327251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:35,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185429256] [2021-06-06 00:06:35,297 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 [2021-06-06 00:06:35,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:06:35,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:35,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185429256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:35,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:35,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:06:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203186594] [2021-06-06 00:06:35,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:06:35,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:06:35,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:06:35,374 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) [2021-06-06 00:06:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:35,629 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-06 00:06:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:06:35,630 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 [2021-06-06 00:06:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:35,633 INFO L225 Difference]: With dead ends: 1605 [2021-06-06 00:06:35,633 INFO L226 Difference]: Without dead ends: 1605 [2021-06-06 00:06:35,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:06:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-06 00:06:35,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-06 00:06:35,650 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) [2021-06-06 00:06:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-06 00:06:35,653 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-06 00:06:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:35,653 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-06 00:06:35,653 INFO L483 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) [2021-06-06 00:06:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-06 00:06:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:35,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:35,655 INFO L554 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] [2021-06-06 00:06:35,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:35,877 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:35,878 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-06 00:06:35,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:35,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50304050] [2021-06-06 00:06:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:35,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50304050] [2021-06-06 00:06:35,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50304050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105225869] [2021-06-06 00:06:35,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:35,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:35,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:06:35,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105225869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:35,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:35,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:06:35,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92816082] [2021-06-06 00:06:35,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:06:35,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:35,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:06:35,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:06:35,974 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) [2021-06-06 00:06:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:36,163 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-06 00:06:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:06:36,164 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 [2021-06-06 00:06:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:36,166 INFO L225 Difference]: With dead ends: 1524 [2021-06-06 00:06:36,166 INFO L226 Difference]: Without dead ends: 1520 [2021-06-06 00:06:36,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:06:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-06 00:06:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-06 00:06:36,179 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) [2021-06-06 00:06:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-06 00:06:36,182 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-06 00:06:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:36,182 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-06 00:06:36,182 INFO L483 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) [2021-06-06 00:06:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-06 00:06:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:36,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:36,184 INFO L554 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] [2021-06-06 00:06:36,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-06 00:06:36,406 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:36,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-06 00:06:36,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:36,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691493681] [2021-06-06 00:06:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:36,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:36,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691493681] [2021-06-06 00:06:36,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691493681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:36,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499266454] [2021-06-06 00:06:36,447 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 [2021-06-06 00:06:36,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:06:36,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:36,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:36,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:36,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499266454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:36,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:36,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:06:36,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308879444] [2021-06-06 00:06:36,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:06:36,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:36,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:06:36,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:06:36,531 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) [2021-06-06 00:06:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:36,773 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-06 00:06:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:06:36,773 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 [2021-06-06 00:06:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:36,775 INFO L225 Difference]: With dead ends: 1508 [2021-06-06 00:06:36,775 INFO L226 Difference]: Without dead ends: 1496 [2021-06-06 00:06:36,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:06:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-06 00:06:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-06 00:06:36,790 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) [2021-06-06 00:06:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-06 00:06:36,792 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-06 00:06:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:36,792 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-06 00:06:36,793 INFO L483 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) [2021-06-06 00:06:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-06 00:06:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:36,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:36,794 INFO L554 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] [2021-06-06 00:06:37,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:37,000 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:37,000 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-06 00:06:37,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:37,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809564942] [2021-06-06 00:06:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:37,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:37,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809564942] [2021-06-06 00:06:37,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809564942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:37,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338181929] [2021-06-06 00:06:37,043 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 [2021-06-06 00:06:37,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:37,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:37,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:37,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338181929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:37,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:37,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:37,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6124842] [2021-06-06 00:06:37,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:37,159 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) [2021-06-06 00:06:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:37,706 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-06 00:06:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:06:37,706 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 [2021-06-06 00:06:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:37,710 INFO L225 Difference]: With dead ends: 2412 [2021-06-06 00:06:37,710 INFO L226 Difference]: Without dead ends: 2412 [2021-06-06 00:06:37,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:06:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-06 00:06:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-06 00:06:37,753 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) [2021-06-06 00:06:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-06 00:06:37,756 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-06 00:06:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:37,756 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-06 00:06:37,756 INFO L483 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) [2021-06-06 00:06:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-06 00:06:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:37,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:37,759 INFO L554 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] [2021-06-06 00:06:37,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-06 00:06:37,973 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:37,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-06 00:06:37,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:37,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843218719] [2021-06-06 00:06:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:38,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:38,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843218719] [2021-06-06 00:06:38,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843218719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:38,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245078650] [2021-06-06 00:06:38,022 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:38,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245078650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:38,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:38,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:38,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490001509] [2021-06-06 00:06:38,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:38,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:38,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:38,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:38,157 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) [2021-06-06 00:06:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:38,627 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-06 00:06:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:06:38,627 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 [2021-06-06 00:06:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:38,630 INFO L225 Difference]: With dead ends: 2335 [2021-06-06 00:06:38,630 INFO L226 Difference]: Without dead ends: 2335 [2021-06-06 00:06:38,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:06:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-06 00:06:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-06 00:06:38,647 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) [2021-06-06 00:06:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:06:38,650 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:06:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:38,650 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:06:38,650 INFO L483 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) [2021-06-06 00:06:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:06:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:38,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:38,652 INFO L554 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] [2021-06-06 00:06:38,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:38,857 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-06 00:06:38,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:38,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728843792] [2021-06-06 00:06:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:38,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:38,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728843792] [2021-06-06 00:06:38,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728843792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:38,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782013306] [2021-06-06 00:06:38,894 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 [2021-06-06 00:06:38,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:38,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782013306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:39,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:39,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:06:39,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66802218] [2021-06-06 00:06:39,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:39,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:39,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:39,014 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) [2021-06-06 00:06:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:39,415 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-06 00:06:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:06:39,417 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 [2021-06-06 00:06:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:39,420 INFO L225 Difference]: With dead ends: 2285 [2021-06-06 00:06:39,420 INFO L226 Difference]: Without dead ends: 2285 [2021-06-06 00:06:39,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:06:39,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-06 00:06:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-06 00:06:39,437 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) [2021-06-06 00:06:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:06:39,439 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:06:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:39,439 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:06:39,439 INFO L483 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) [2021-06-06 00:06:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:06:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:39,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:39,441 INFO L554 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] [2021-06-06 00:06:39,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-06 00:06:39,648 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:39,648 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-06 00:06:39,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:39,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032800755] [2021-06-06 00:06:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:39,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032800755] [2021-06-06 00:06:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032800755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055649183] [2021-06-06 00:06:39,703 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 [2021-06-06 00:06:39,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:06:39,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:39,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:39,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055649183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:39,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:39,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:06:39,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517796839] [2021-06-06 00:06:39,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:39,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:39,794 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) [2021-06-06 00:06:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:40,138 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-06 00:06:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:06:40,138 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 [2021-06-06 00:06:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:40,141 INFO L225 Difference]: With dead ends: 2176 [2021-06-06 00:06:40,141 INFO L226 Difference]: Without dead ends: 2172 [2021-06-06 00:06:40,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:06:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-06 00:06:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-06 00:06:40,157 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) [2021-06-06 00:06:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:06:40,159 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:06:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:40,159 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:06:40,159 INFO L483 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) [2021-06-06 00:06:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:06:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:40,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:40,161 INFO L554 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] [2021-06-06 00:06:40,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:40,377 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-06 00:06:40,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:40,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060888300] [2021-06-06 00:06:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:40,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:40,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060888300] [2021-06-06 00:06:40,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060888300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:40,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491536113] [2021-06-06 00:06:40,414 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 [2021-06-06 00:06:40,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:40,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:40,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491536113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:40,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:40,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074514820] [2021-06-06 00:06:40,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:40,521 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) [2021-06-06 00:06:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:40,926 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-06 00:06:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:06:40,926 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 [2021-06-06 00:06:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:40,929 INFO L225 Difference]: With dead ends: 2199 [2021-06-06 00:06:40,929 INFO L226 Difference]: Without dead ends: 2199 [2021-06-06 00:06:40,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:06:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-06 00:06:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-06 00:06:40,944 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) [2021-06-06 00:06:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:06:40,945 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:06:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:40,946 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:06:40,946 INFO L483 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) [2021-06-06 00:06:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:06:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:40,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:40,948 INFO L554 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] [2021-06-06 00:06:41,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-06 00:06:41,158 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-06 00:06:41,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:41,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144043275] [2021-06-06 00:06:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:41,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144043275] [2021-06-06 00:06:41,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144043275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290295426] [2021-06-06 00:06:41,195 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 [2021-06-06 00:06:41,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:06:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290295426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:41,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:41,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068211994] [2021-06-06 00:06:41,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:41,287 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) [2021-06-06 00:06:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:41,653 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-06 00:06:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:06:41,653 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 [2021-06-06 00:06:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:41,655 INFO L225 Difference]: With dead ends: 2156 [2021-06-06 00:06:41,655 INFO L226 Difference]: Without dead ends: 2152 [2021-06-06 00:06:41,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:06:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-06 00:06:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-06 00:06:41,674 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) [2021-06-06 00:06:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:06:41,677 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:06:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:41,677 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:06:41,677 INFO L483 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) [2021-06-06 00:06:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:06:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:41,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:41,679 INFO L554 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] [2021-06-06 00:06:41,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-06 00:06:41,900 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-06 00:06:41,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:41,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492032549] [2021-06-06 00:06:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:41,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:41,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492032549] [2021-06-06 00:06:41,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492032549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:41,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271024190] [2021-06-06 00:06:41,936 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 [2021-06-06 00:06:41,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:41,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:41,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:41,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:42,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271024190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:42,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:42,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:06:42,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991602014] [2021-06-06 00:06:42,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:06:42,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:42,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:06:42,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:06:42,030 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) [2021-06-06 00:06:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:42,362 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-06 00:06:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:06:42,362 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 [2021-06-06 00:06:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:42,364 INFO L225 Difference]: With dead ends: 2097 [2021-06-06 00:06:42,364 INFO L226 Difference]: Without dead ends: 2097 [2021-06-06 00:06:42,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:06:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-06 00:06:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-06 00:06:42,389 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) [2021-06-06 00:06:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-06 00:06:42,391 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-06 00:06:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:42,391 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-06 00:06:42,391 INFO L483 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) [2021-06-06 00:06:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-06 00:06:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:42,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:42,393 INFO L554 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] [2021-06-06 00:06:42,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:42,594 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-06 00:06:42,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:42,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779966286] [2021-06-06 00:06:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:42,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:42,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779966286] [2021-06-06 00:06:42,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779966286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:42,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144935551] [2021-06-06 00:06:42,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:42,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:42,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144935551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:42,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:42,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:06:42,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739463976] [2021-06-06 00:06:42,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:06:42,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:42,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:06:42,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:06:42,705 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) [2021-06-06 00:06:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:42,968 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-06 00:06:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:06:42,969 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 [2021-06-06 00:06:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:42,971 INFO L225 Difference]: With dead ends: 1963 [2021-06-06 00:06:42,971 INFO L226 Difference]: Without dead ends: 1959 [2021-06-06 00:06:42,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:06:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-06 00:06:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-06 00:06:42,992 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) [2021-06-06 00:06:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-06 00:06:42,995 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-06 00:06:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:42,995 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-06 00:06:42,995 INFO L483 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) [2021-06-06 00:06:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-06 00:06:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:42,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:42,997 INFO L554 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] [2021-06-06 00:06:43,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:43,217 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-06 00:06:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:43,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858901388] [2021-06-06 00:06:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:43,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:43,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858901388] [2021-06-06 00:06:43,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858901388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:43,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231342734] [2021-06-06 00:06:43,250 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 [2021-06-06 00:06:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231342734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:43,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:43,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:06:43,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647433057] [2021-06-06 00:06:43,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:06:43,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:06:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:06:43,326 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) [2021-06-06 00:06:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:43,533 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-06 00:06:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:06:43,534 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 [2021-06-06 00:06:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:43,536 INFO L225 Difference]: With dead ends: 1728 [2021-06-06 00:06:43,536 INFO L226 Difference]: Without dead ends: 1716 [2021-06-06 00:06:43,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:06:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-06 00:06:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-06 00:06:43,549 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) [2021-06-06 00:06:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-06 00:06:43,552 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-06 00:06:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:43,552 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-06 00:06:43,553 INFO L483 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) [2021-06-06 00:06:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-06 00:06:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:43,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:43,555 INFO L554 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] [2021-06-06 00:06:43,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:43,770 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-06 00:06:43,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:43,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653938451] [2021-06-06 00:06:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:43,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:43,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653938451] [2021-06-06 00:06:43,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653938451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:43,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826773513] [2021-06-06 00:06:43,810 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 [2021-06-06 00:06:43,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:06:43,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:43,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826773513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:43,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:43,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:43,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381061745] [2021-06-06 00:06:43,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:43,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:43,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:43,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:43,934 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) [2021-06-06 00:06:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:44,264 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-06 00:06:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:06:44,265 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 [2021-06-06 00:06:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:44,267 INFO L225 Difference]: With dead ends: 1821 [2021-06-06 00:06:44,267 INFO L226 Difference]: Without dead ends: 1821 [2021-06-06 00:06:44,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:06:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-06 00:06:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-06 00:06:44,288 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) [2021-06-06 00:06:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-06 00:06:44,290 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-06 00:06:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:44,291 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-06 00:06:44,291 INFO L483 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) [2021-06-06 00:06:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-06 00:06:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:44,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:44,293 INFO L554 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] [2021-06-06 00:06:44,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:44,509 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-06 00:06:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:44,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811616337] [2021-06-06 00:06:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:44,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:44,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811616337] [2021-06-06 00:06:44,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811616337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:44,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426337341] [2021-06-06 00:06:44,545 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 [2021-06-06 00:06:44,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:44,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:44,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426337341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:44,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:44,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:06:44,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903184399] [2021-06-06 00:06:44,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:06:44,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:44,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:06:44,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:06:44,657 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) [2021-06-06 00:06:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:44,926 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-06 00:06:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:06:44,927 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 [2021-06-06 00:06:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:44,929 INFO L225 Difference]: With dead ends: 1790 [2021-06-06 00:06:44,929 INFO L226 Difference]: Without dead ends: 1786 [2021-06-06 00:06:44,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:06:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-06 00:06:44,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-06 00:06:44,943 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) [2021-06-06 00:06:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-06 00:06:44,946 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-06 00:06:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:44,946 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-06 00:06:44,946 INFO L483 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) [2021-06-06 00:06:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-06 00:06:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:06:44,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:44,949 INFO L554 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] [2021-06-06 00:06:45,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-06 00:06:45,170 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-06 00:06:45,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:45,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041037761] [2021-06-06 00:06:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:45,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041037761] [2021-06-06 00:06:45,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041037761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109174275] [2021-06-06 00:06:45,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:45,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:06:45,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:06:45,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:45,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109174275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:45,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:45,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:06:45,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378795218] [2021-06-06 00:06:45,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:06:45,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:06:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:06:45,312 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) [2021-06-06 00:06:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:45,472 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-06 00:06:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:06:45,473 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 [2021-06-06 00:06:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:45,474 INFO L225 Difference]: With dead ends: 1649 [2021-06-06 00:06:45,475 INFO L226 Difference]: Without dead ends: 1637 [2021-06-06 00:06:45,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:06:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-06 00:06:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-06 00:06:45,487 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) [2021-06-06 00:06:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-06 00:06:45,509 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-06 00:06:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:45,510 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-06 00:06:45,510 INFO L483 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) [2021-06-06 00:06:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-06 00:06:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:45,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:45,511 INFO L554 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] [2021-06-06 00:06:45,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:45,712 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-06 00:06:45,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:45,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911664802] [2021-06-06 00:06:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:46,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:46,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911664802] [2021-06-06 00:06:46,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911664802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:46,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752665710] [2021-06-06 00:06:46,345 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:46,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:06:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,874 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 [2021-06-06 00:06:46,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,883 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 [2021-06-06 00:06:46,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,892 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 [2021-06-06 00:06:46,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,900 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 [2021-06-06 00:06:46,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:06:46,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,918 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 [2021-06-06 00:06:46,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,927 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 [2021-06-06 00:06:46,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,934 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 [2021-06-06 00:06:46,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,942 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 [2021-06-06 00:06:46,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,949 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 [2021-06-06 00:06:46,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,956 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 33 treesize of output 19 [2021-06-06 00:06:46,957 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,962 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 [2021-06-06 00:06:46,963 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,968 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 [2021-06-06 00:06:46,969 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,974 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 [2021-06-06 00:06:46,975 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:46,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:46,978 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 [2021-06-06 00:06:46,979 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:47,055 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:06:47,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:06:47,056 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:06:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:47,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752665710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:47,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:47,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:06:47,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367781383] [2021-06-06 00:06:47,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:06:47,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:47,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:06:47,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:47,133 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) [2021-06-06 00:06:47,879 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-06 00:06:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:48,153 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-06 00:06:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:06:48,155 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 [2021-06-06 00:06:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:48,157 INFO L225 Difference]: With dead ends: 1517 [2021-06-06 00:06:48,157 INFO L226 Difference]: Without dead ends: 1502 [2021-06-06 00:06:48,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1489.7ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:06:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-06 00:06:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-06 00:06:48,176 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) [2021-06-06 00:06:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-06 00:06:48,179 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-06 00:06:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:48,180 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-06 00:06:48,180 INFO L483 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) [2021-06-06 00:06:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-06 00:06:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:48,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:48,182 INFO L554 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] [2021-06-06 00:06:48,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-06 00:06:48,397 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-06 00:06:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:48,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161601357] [2021-06-06 00:06:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:48,647 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-06 00:06:48,768 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-06 00:06:49,124 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-06 00:06:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:49,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:49,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161601357] [2021-06-06 00:06:49,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161601357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:49,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157371741] [2021-06-06 00:06:49,176 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 [2021-06-06 00:06:49,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:06:49,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:49,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:06:49,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:49,729 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-06 00:06:49,791 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_5, v_prenex_7], 3=[v_prenex_9, A]} [2021-06-06 00:06:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:49,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:49,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:49,801 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 [2021-06-06 00:06:49,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:49,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:49,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:49,809 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 33 treesize of output 19 [2021-06-06 00:06:49,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:49,929 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-06 00:06:49,930 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-06-06 00:06:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:49,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:49,934 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 [2021-06-06 00:06:49,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:49,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:49,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:49,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:06:49,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:50,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:50,025 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 [2021-06-06 00:06:50,026 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:50,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:50,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:06:50,064 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-06-06 00:06:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:50,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157371741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:50,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:50,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:06:50,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240602604] [2021-06-06 00:06:50,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:06:50,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:50,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:06:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:50,128 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) [2021-06-06 00:06:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:50,978 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-06 00:06:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:06:50,978 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 [2021-06-06 00:06:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:50,980 INFO L225 Difference]: With dead ends: 1495 [2021-06-06 00:06:50,980 INFO L226 Difference]: Without dead ends: 1480 [2021-06-06 00:06:50,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1671.6ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:06:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-06 00:06:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-06 00:06:50,992 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) [2021-06-06 00:06:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-06 00:06:50,994 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-06 00:06:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:50,994 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-06 00:06:50,994 INFO L483 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) [2021-06-06 00:06:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-06 00:06:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:50,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:50,996 INFO L554 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] [2021-06-06 00:06:51,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:51,197 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-06 00:06:51,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:51,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119057800] [2021-06-06 00:06:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:51,540 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-06 00:06:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:51,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:51,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119057800] [2021-06-06 00:06:51,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119057800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:51,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290059912] [2021-06-06 00:06:51,767 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 [2021-06-06 00:06:51,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:51,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:06:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:52,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,493 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 41 treesize of output 16 [2021-06-06 00:06:52,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:06:52,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,518 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 [2021-06-06 00:06:52,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,528 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 [2021-06-06 00:06:52,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,538 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 [2021-06-06 00:06:52,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,548 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 [2021-06-06 00:06:52,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,559 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 39 treesize of output 13 [2021-06-06 00:06:52,560 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,570 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 28 treesize of output 13 [2021-06-06 00:06:52,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,581 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 [2021-06-06 00:06:52,581 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,592 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 [2021-06-06 00:06:52,593 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,605 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 [2021-06-06 00:06:52,605 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:06:52,616 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:06:52,627 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,635 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 32 treesize of output 16 [2021-06-06 00:06:52,636 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:52,641 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 [2021-06-06 00:06:52,642 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:52,671 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-06 00:06:52,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:06:52,673 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:06:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:52,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290059912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:52,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:52,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:06:52,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285167452] [2021-06-06 00:06:52,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:06:52,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:52,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:06:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:52,710 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 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) [2021-06-06 00:06:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:54,250 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-06-06 00:06:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:06:54,250 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 [2021-06-06 00:06:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:54,253 INFO L225 Difference]: With dead ends: 1607 [2021-06-06 00:06:54,253 INFO L226 Difference]: Without dead ends: 1592 [2021-06-06 00:06:54,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1889.9ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:06:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-06 00:06:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-06-06 00:06:54,265 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) [2021-06-06 00:06:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-06 00:06:54,267 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-06 00:06:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:54,267 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-06 00:06:54,267 INFO L483 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) [2021-06-06 00:06:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-06 00:06:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:54,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:54,269 INFO L554 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] [2021-06-06 00:06:54,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-06 00:06:54,470 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-06 00:06:54,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:54,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202342822] [2021-06-06 00:06:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:55,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:55,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202342822] [2021-06-06 00:06:55,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202342822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:55,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590281381] [2021-06-06 00:06:55,009 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 [2021-06-06 00:06:55,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:55,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:06:55,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:55,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,303 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 [2021-06-06 00:06:55,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,313 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:06:55,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:55,327 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 [2021-06-06 00:06:55,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,342 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 [2021-06-06 00:06:55,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:55,357 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 16 treesize of output 18 [2021-06-06 00:06:55,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:55,376 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 [2021-06-06 00:06:55,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,388 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,388 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 28 treesize of output 16 [2021-06-06 00:06:55,389 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:55,402 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 [2021-06-06 00:06:55,436 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,447 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,447 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 [2021-06-06 00:06:55,448 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:55,461 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 26 treesize of output 24 [2021-06-06 00:06:55,462 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,474 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 [2021-06-06 00:06:55,474 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,484 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,484 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 [2021-06-06 00:06:55,485 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:55,498 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 [2021-06-06 00:06:55,500 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,513 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:55,513 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 21 treesize of output 17 [2021-06-06 00:06:55,515 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,528 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:55,528 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 [2021-06-06 00:06:55,530 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:55,537 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:55,537 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 31 treesize of output 19 [2021-06-06 00:06:55,538 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:55,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:55,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:06:55,627 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:06:55,758 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-06 00:06:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:55,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590281381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:55,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:55,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:06:55,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739954262] [2021-06-06 00:06:55,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:06:55,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:55,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:06:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:06:55,878 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) [2021-06-06 00:06:56,265 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-06 00:06:56,391 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2021-06-06 00:06:56,534 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-06 00:06:57,002 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-06-06 00:06:57,128 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-06 00:06:57,263 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-06 00:06:57,552 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-06 00:06:57,701 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-06 00:06:57,909 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-06 00:06:58,175 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-06 00:06:58,330 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-06 00:06:58,633 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:06:58,939 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-06 00:06:59,211 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-06-06 00:06:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:59,263 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-06-06 00:06:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:06:59,263 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 [2021-06-06 00:06:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:59,265 INFO L225 Difference]: With dead ends: 1842 [2021-06-06 00:06:59,265 INFO L226 Difference]: Without dead ends: 1827 [2021-06-06 00:06:59,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3521.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:06:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-06-06 00:06:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-06-06 00:06:59,280 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) [2021-06-06 00:06:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-06 00:06:59,282 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-06 00:06:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:59,282 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-06 00:06:59,282 INFO L483 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) [2021-06-06 00:06:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-06 00:06:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:59,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:59,284 INFO L554 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] [2021-06-06 00:06:59,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:59,484 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-06 00:06:59,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:59,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295088748] [2021-06-06 00:06:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:59,870 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-06-06 00:07:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:00,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:00,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295088748] [2021-06-06 00:07:00,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295088748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:00,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677642649] [2021-06-06 00:07:00,016 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 [2021-06-06 00:07:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:07:00,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:00,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,673 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 [2021-06-06 00:07:00,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,684 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 [2021-06-06 00:07:00,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,697 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 [2021-06-06 00:07:00,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,707 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 [2021-06-06 00:07:00,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,718 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 [2021-06-06 00:07:00,719 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,729 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 [2021-06-06 00:07:00,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,741 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 [2021-06-06 00:07:00,742 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,753 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 [2021-06-06 00:07:00,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,764 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 [2021-06-06 00:07:00,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,776 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 [2021-06-06 00:07:00,777 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,786 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 [2021-06-06 00:07:00,787 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,797 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 43 treesize of output 13 [2021-06-06 00:07:00,798 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,807 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 [2021-06-06 00:07:00,808 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,821 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 [2021-06-06 00:07:00,822 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,831 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 [2021-06-06 00:07:00,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:00,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:00,839 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 43 treesize of output 13 [2021-06-06 00:07:00,841 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:00,878 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-06-06 00:07:00,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:00,880 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-06-06 00:07:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:00,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677642649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:00,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:00,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:07:00,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453974055] [2021-06-06 00:07:00,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:07:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:00,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:07:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:07:00,914 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 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) [2021-06-06 00:07:01,291 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-06-06 00:07:02,045 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-06-06 00:07:02,195 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2021-06-06 00:07:02,383 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-06-06 00:07:02,529 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-06-06 00:07:02,971 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-06 00:07:03,412 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-06-06 00:07:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:03,535 INFO L93 Difference]: Finished difference Result 1797 states and 5747 transitions. [2021-06-06 00:07:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:07:03,536 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 [2021-06-06 00:07:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:03,538 INFO L225 Difference]: With dead ends: 1797 [2021-06-06 00:07:03,538 INFO L226 Difference]: Without dead ends: 1782 [2021-06-06 00:07:03,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2816.7ms TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:07:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-06-06 00:07:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1206. [2021-06-06 00:07:03,552 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) [2021-06-06 00:07:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-06 00:07:03,554 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-06 00:07:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:03,554 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-06 00:07:03,554 INFO L483 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) [2021-06-06 00:07:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-06 00:07:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:03,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:03,555 INFO L554 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] [2021-06-06 00:07:03,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-06 00:07:03,756 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-06 00:07:03,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:03,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371364594] [2021-06-06 00:07:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:04,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:04,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371364594] [2021-06-06 00:07:04,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371364594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:04,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099754062] [2021-06-06 00:07:04,318 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 [2021-06-06 00:07:04,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:04,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:04,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:07:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,151 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-06 00:07:05,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:05,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,218 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-06 00:07:05,219 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 [2021-06-06 00:07:05,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,248 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:05,248 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 [2021-06-06 00:07:05,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,294 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:07:05,294 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 [2021-06-06 00:07:05,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,347 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:07:05,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:05,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,408 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-06 00:07:05,408 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 42 [2021-06-06 00:07:05,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,432 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:05,432 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 1 [2021-06-06 00:07:05,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,483 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:07:05,483 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-06 00:07:05,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,539 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:05,539 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 1 [2021-06-06 00:07:05,540 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,601 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:07:05,601 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 [2021-06-06 00:07:05,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,639 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:05,640 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:07:05,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,684 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:07:05,685 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 [2021-06-06 00:07:05,694 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,715 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:05,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:05,716 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,737 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:05,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:05,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,786 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:07:05,786 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 49 [2021-06-06 00:07:05,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:05,822 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:05,822 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 1 [2021-06-06 00:07:05,823 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:06,195 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-06 00:07:06,195 INFO L628 ElimStorePlain]: treesize reduction 109, result has 76.9 percent of original size [2021-06-06 00:07:06,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:07:06,211 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:437 [2021-06-06 00:07:06,485 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-06 00:07:06,645 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-06 00:07:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099754062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:06,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:06,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-06 00:07:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998584053] [2021-06-06 00:07:06,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:07:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:07:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:07:06,694 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:07,805 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-06 00:07:08,356 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-06-06 00:07:08,507 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-06 00:07:08,701 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-06-06 00:07:09,148 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2021-06-06 00:07:09,686 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2021-06-06 00:07:10,059 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2021-06-06 00:07:10,217 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-06 00:07:10,383 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-06 00:07:10,785 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2021-06-06 00:07:11,157 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-06-06 00:07:11,370 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2021-06-06 00:07:11,635 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-06 00:07:11,851 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-06 00:07:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:12,090 INFO L93 Difference]: Finished difference Result 2305 states and 7128 transitions. [2021-06-06 00:07:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:07:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:07:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:12,095 INFO L225 Difference]: With dead ends: 2305 [2021-06-06 00:07:12,095 INFO L226 Difference]: Without dead ends: 2260 [2021-06-06 00:07:12,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 5918.6ms TimeCoverageRelationStatistics Valid=600, Invalid=2940, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:07:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-06-06 00:07:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1349. [2021-06-06 00:07:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.306379821958457) internal successors, (4457), 1348 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4457 transitions. [2021-06-06 00:07:12,114 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4457 transitions. Word has length 26 [2021-06-06 00:07:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:12,114 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4457 transitions. [2021-06-06 00:07:12,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4457 transitions. [2021-06-06 00:07:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:12,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:12,116 INFO L554 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] [2021-06-06 00:07:12,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:12,316 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-06 00:07:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:12,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452176411] [2021-06-06 00:07:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:12,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452176411] [2021-06-06 00:07:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452176411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317327913] [2021-06-06 00:07:12,850 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 [2021-06-06 00:07:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:07:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:13,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,279 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 [2021-06-06 00:07:13,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,287 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 33 treesize of output 19 [2021-06-06 00:07:13,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,294 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 [2021-06-06 00:07:13,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,301 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 [2021-06-06 00:07:13,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:13,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,316 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 [2021-06-06 00:07:13,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,323 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:07:13,324 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:13,332 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,339 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 [2021-06-06 00:07:13,340 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:13,349 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:13,360 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,366 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 [2021-06-06 00:07:13,366 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,372 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 [2021-06-06 00:07:13,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:13,380 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:13,385 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 [2021-06-06 00:07:13,386 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,461 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:07:13,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:13,463 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:07:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:13,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317327913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:13,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:13,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:07:13,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103489891] [2021-06-06 00:07:13,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:07:13,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:13,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:07:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:07:13,515 INFO L87 Difference]: Start difference. First operand 1349 states and 4457 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) [2021-06-06 00:07:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:14,574 INFO L93 Difference]: Finished difference Result 1744 states and 5646 transitions. [2021-06-06 00:07:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:07:14,574 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 [2021-06-06 00:07:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:14,576 INFO L225 Difference]: With dead ends: 1744 [2021-06-06 00:07:14,576 INFO L226 Difference]: Without dead ends: 1729 [2021-06-06 00:07:14,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1377.5ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:07:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-06-06 00:07:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1360. [2021-06-06 00:07:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.3038999264164826) internal successors, (4490), 1359 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4490 transitions. [2021-06-06 00:07:14,595 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4490 transitions. Word has length 26 [2021-06-06 00:07:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:14,595 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4490 transitions. [2021-06-06 00:07:14,595 INFO L483 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) [2021-06-06 00:07:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4490 transitions. [2021-06-06 00:07:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:14,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:14,598 INFO L554 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] [2021-06-06 00:07:14,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-06 00:07:14,813 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-06 00:07:14,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:14,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028070478] [2021-06-06 00:07:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:15,186 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-06 00:07:15,315 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-06-06 00:07:15,546 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-06 00:07:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:15,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028070478] [2021-06-06 00:07:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028070478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563851971] [2021-06-06 00:07:15,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:15,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:07:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:15,972 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-06 00:07:16,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:16,137 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-06 00:07:16,137 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 [2021-06-06 00:07:16,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:16,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:16,178 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:07:16,178 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-06-06 00:07:16,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:16,598 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 130 [2021-06-06 00:07:16,599 INFO L628 ElimStorePlain]: treesize reduction 403, result has 46.9 percent of original size [2021-06-06 00:07:16,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:16,617 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 [2021-06-06 00:07:16,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:16,757 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:07:16,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:16,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:16,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:16,781 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 37 [2021-06-06 00:07:16,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:16,925 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-06 00:07:16,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:16,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:16,948 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:07:16,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-06 00:07:16,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:17,112 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-06 00:07:17,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:17,140 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:07:17,140 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 [2021-06-06 00:07:17,142 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:17,281 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:07:17,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:17,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:17,301 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:07:17,301 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 26 [2021-06-06 00:07:17,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:17,428 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:07:17,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:17,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:17,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:17,446 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 37 [2021-06-06 00:07:17,447 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:17,573 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-06 00:07:17,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:17,592 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:07:17,592 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 [2021-06-06 00:07:17,596 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:17,718 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-06 00:07:17,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:17,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:07:17,735 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:825, output treesize:551 [2021-06-06 00:07:18,027 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-06 00:07:18,230 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-06 00:07:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:18,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563851971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:18,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:18,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:07:18,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979912538] [2021-06-06 00:07:18,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:18,347 INFO L87 Difference]: Start difference. First operand 1360 states and 4490 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) [2021-06-06 00:07:19,005 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-06 00:07:19,141 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-06-06 00:07:19,354 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-06-06 00:07:19,547 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-06 00:07:19,751 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-06-06 00:07:20,005 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2021-06-06 00:07:20,335 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2021-06-06 00:07:20,693 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:07:21,187 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-06 00:07:21,612 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-06 00:07:21,983 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-06 00:07:22,143 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-06 00:07:22,410 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-06-06 00:07:22,775 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-06 00:07:23,227 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-06 00:07:23,471 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-06 00:07:24,090 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2021-06-06 00:07:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:24,185 INFO L93 Difference]: Finished difference Result 2016 states and 6372 transitions. [2021-06-06 00:07:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:07:24,186 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 [2021-06-06 00:07:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:24,189 INFO L225 Difference]: With dead ends: 2016 [2021-06-06 00:07:24,189 INFO L226 Difference]: Without dead ends: 2001 [2021-06-06 00:07:24,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6491.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:07:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-06-06 00:07:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1371. [2021-06-06 00:07:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3124087591240876) internal successors, (4538), 1370 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4538 transitions. [2021-06-06 00:07:24,209 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4538 transitions. Word has length 26 [2021-06-06 00:07:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:24,209 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4538 transitions. [2021-06-06 00:07:24,209 INFO L483 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) [2021-06-06 00:07:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4538 transitions. [2021-06-06 00:07:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:24,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:24,212 INFO L554 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] [2021-06-06 00:07:24,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-06 00:07:24,412 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-06-06 00:07:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:24,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721480734] [2021-06-06 00:07:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:24,657 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-06 00:07:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:24,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721480734] [2021-06-06 00:07:24,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721480734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065369095] [2021-06-06 00:07:24,891 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 [2021-06-06 00:07:24,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:07:24,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:24,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:25,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:25,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,373 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 [2021-06-06 00:07:25,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,381 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 [2021-06-06 00:07:25,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,389 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 28 treesize of output 16 [2021-06-06 00:07:25,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,396 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 [2021-06-06 00:07:25,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,404 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 [2021-06-06 00:07:25,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,413 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 33 treesize of output 19 [2021-06-06 00:07:25,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,421 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 [2021-06-06 00:07:25,422 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,427 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 [2021-06-06 00:07:25,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,433 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 [2021-06-06 00:07:25,433 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,438 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 [2021-06-06 00:07:25,439 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,444 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 [2021-06-06 00:07:25,444 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,449 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 [2021-06-06 00:07:25,450 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,455 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 [2021-06-06 00:07:25,455 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:25,459 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 [2021-06-06 00:07:25,459 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,535 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:07:25,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:25,537 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:07:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:25,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065369095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:25,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:25,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:07:25,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709808713] [2021-06-06 00:07:25,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:07:25,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:07:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:07:25,588 INFO L87 Difference]: Start difference. First operand 1371 states and 4538 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) [2021-06-06 00:07:25,814 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 31 [2021-06-06 00:07:26,337 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-06-06 00:07:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:26,963 INFO L93 Difference]: Finished difference Result 1859 states and 6002 transitions. [2021-06-06 00:07:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:07:26,963 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 [2021-06-06 00:07:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:26,966 INFO L225 Difference]: With dead ends: 1859 [2021-06-06 00:07:26,966 INFO L226 Difference]: Without dead ends: 1844 [2021-06-06 00:07:26,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1700.9ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:07:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-06 00:07:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1380. [2021-06-06 00:07:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-06 00:07:26,985 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-06 00:07:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:26,985 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-06 00:07:26,985 INFO L483 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) [2021-06-06 00:07:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-06 00:07:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:26,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:26,987 INFO L554 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] [2021-06-06 00:07:27,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:27,188 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-06-06 00:07:27,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:27,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067828305] [2021-06-06 00:07:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:27,484 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-06 00:07:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:27,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:27,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067828305] [2021-06-06 00:07:27,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067828305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:27,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439970712] [2021-06-06 00:07:27,758 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 [2021-06-06 00:07:27,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:27,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,175 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 [2021-06-06 00:07:28,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,182 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:07:28,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,189 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:07:28,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,197 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 [2021-06-06 00:07:28,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,204 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 [2021-06-06 00:07:28,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,213 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 [2021-06-06 00:07:28,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:28,220 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,227 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 [2021-06-06 00:07:28,227 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,233 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 [2021-06-06 00:07:28,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,241 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 [2021-06-06 00:07:28,242 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,248 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 [2021-06-06 00:07:28,249 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,256 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 [2021-06-06 00:07:28,256 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:07:28,264 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,269 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:07:28,270 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:28,275 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 [2021-06-06 00:07:28,276 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:28,361 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:07:28,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:28,363 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:07:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:28,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439970712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:28,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:28,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:07:28,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681989601] [2021-06-06 00:07:28,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:07:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:07:28,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:07:28,424 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-06-06 00:07:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:29,086 INFO L93 Difference]: Finished difference Result 1722 states and 5631 transitions. [2021-06-06 00:07:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:07:29,086 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 [2021-06-06 00:07:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:29,089 INFO L225 Difference]: With dead ends: 1722 [2021-06-06 00:07:29,089 INFO L226 Difference]: Without dead ends: 1707 [2021-06-06 00:07:29,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1175.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:07:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-06 00:07:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1380. [2021-06-06 00:07:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-06 00:07:29,106 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-06 00:07:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:29,106 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-06 00:07:29,106 INFO L483 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) [2021-06-06 00:07:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-06 00:07:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:29,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:29,108 INFO L554 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] [2021-06-06 00:07:29,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-06 00:07:29,309 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-06-06 00:07:29,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:29,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437809155] [2021-06-06 00:07:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:29,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437809155] [2021-06-06 00:07:29,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437809155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684294165] [2021-06-06 00:07:29,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:29,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:29,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:29,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:07:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,139 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:30,139 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 [2021-06-06 00:07:30,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,152 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:30,152 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 [2021-06-06 00:07:30,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,163 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 33 treesize of output 19 [2021-06-06 00:07:30,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,177 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,177 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 [2021-06-06 00:07:30,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,188 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 [2021-06-06 00:07:30,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:30,200 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 [2021-06-06 00:07:30,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:30,214 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 [2021-06-06 00:07:30,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:30,227 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 [2021-06-06 00:07:30,231 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,241 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,241 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 [2021-06-06 00:07:30,241 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:30,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:30,257 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,266 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 [2021-06-06 00:07:30,267 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,276 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,276 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 [2021-06-06 00:07:30,277 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,288 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:30,288 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 [2021-06-06 00:07:30,290 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:30,301 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 [2021-06-06 00:07:30,302 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,312 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 36 treesize of output 22 [2021-06-06 00:07:30,313 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:30,319 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:30,319 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 [2021-06-06 00:07:30,320 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:30,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:07:30,409 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-06 00:07:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:30,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684294165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:30,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:30,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:07:30,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424729709] [2021-06-06 00:07:30,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:30,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:30,604 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-06-06 00:07:31,086 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 39 [2021-06-06 00:07:31,296 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-06 00:07:31,791 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-06-06 00:07:31,940 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-06 00:07:32,226 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-06-06 00:07:32,539 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-06-06 00:07:33,150 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-06 00:07:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:33,418 INFO L93 Difference]: Finished difference Result 2174 states and 6962 transitions. [2021-06-06 00:07:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:07:33,419 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 [2021-06-06 00:07:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:33,422 INFO L225 Difference]: With dead ends: 2174 [2021-06-06 00:07:33,422 INFO L226 Difference]: Without dead ends: 2144 [2021-06-06 00:07:33,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2850.1ms TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:07:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-06 00:07:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1380. [2021-06-06 00:07:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-06 00:07:33,466 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-06 00:07:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:33,466 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-06 00:07:33,466 INFO L483 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) [2021-06-06 00:07:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-06 00:07:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:33,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:33,468 INFO L554 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] [2021-06-06 00:07:33,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-06 00:07:33,669 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:33,669 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-06-06 00:07:33,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:33,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618241969] [2021-06-06 00:07:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:34,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618241969] [2021-06-06 00:07:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618241969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739427249] [2021-06-06 00:07:34,182 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 [2021-06-06 00:07:34,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:07:34,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:34,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:07:34,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,463 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,464 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 31 treesize of output 19 [2021-06-06 00:07:34,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,474 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,474 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 [2021-06-06 00:07:34,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:34,486 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 33 treesize of output 27 [2021-06-06 00:07:34,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,499 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 33 treesize of output 19 [2021-06-06 00:07:34,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:34,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:34,529 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 33 treesize of output 27 [2021-06-06 00:07:34,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:34,540 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:34,564 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 [2021-06-06 00:07:34,569 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,583 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,584 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 [2021-06-06 00:07:34,584 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:34,601 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 [2021-06-06 00:07:34,603 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,616 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,617 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 [2021-06-06 00:07:34,618 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,629 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,629 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 [2021-06-06 00:07:34,630 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,644 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:34,644 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 [2021-06-06 00:07:34,646 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,659 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:34,660 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,671 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:34,672 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 [2021-06-06 00:07:34,684 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:34,693 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:34,693 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 [2021-06-06 00:07:34,694 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:34,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:34,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:07:34,780 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:07:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:34,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739427249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:34,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:34,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:07:34,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396410221] [2021-06-06 00:07:34,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:07:34,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:07:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:07:34,969 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-06-06 00:07:35,437 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-06-06 00:07:35,849 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-06 00:07:36,196 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-06-06 00:07:36,685 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-06 00:07:36,894 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-06 00:07:37,090 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-06-06 00:07:37,259 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-06 00:07:37,537 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:07:37,894 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-06-06 00:07:38,170 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-06-06 00:07:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:38,225 INFO L93 Difference]: Finished difference Result 1982 states and 6430 transitions. [2021-06-06 00:07:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:07:38,225 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 [2021-06-06 00:07:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:38,227 INFO L225 Difference]: With dead ends: 1982 [2021-06-06 00:07:38,227 INFO L226 Difference]: Without dead ends: 1967 [2021-06-06 00:07:38,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3467.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:07:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-06-06 00:07:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1380. [2021-06-06 00:07:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-06 00:07:38,246 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-06 00:07:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:38,246 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-06 00:07:38,246 INFO L483 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) [2021-06-06 00:07:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-06 00:07:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:38,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:38,248 INFO L554 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] [2021-06-06 00:07:38,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-06 00:07:38,449 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-06 00:07:38,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:38,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828649119] [2021-06-06 00:07:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:38,820 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-06-06 00:07:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:39,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:39,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828649119] [2021-06-06 00:07:39,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828649119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:39,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602345723] [2021-06-06 00:07:39,112 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 [2021-06-06 00:07:39,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:07:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:39,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,783 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:07:39,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,792 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:07:39,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,803 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 [2021-06-06 00:07:39,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:39,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,823 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 [2021-06-06 00:07:39,823 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,832 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 41 treesize of output 16 [2021-06-06 00:07:39,833 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:39,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,857 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 [2021-06-06 00:07:39,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,867 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 39 treesize of output 16 [2021-06-06 00:07:39,868 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,876 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 [2021-06-06 00:07:39,877 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:39,890 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,898 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 [2021-06-06 00:07:39,899 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,906 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 [2021-06-06 00:07:39,907 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,911 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 [2021-06-06 00:07:39,912 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,938 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-06 00:07:39,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:39,939 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:07:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:39,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602345723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:39,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:39,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:07:39,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384095732] [2021-06-06 00:07:39,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:39,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:39,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:39,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:39,977 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-06-06 00:07:40,390 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-06 00:07:40,891 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-06 00:07:41,133 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-06 00:07:41,472 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-06-06 00:07:41,769 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-06 00:07:41,942 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-06 00:07:42,394 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-06-06 00:07:43,572 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-06-06 00:07:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:44,271 INFO L93 Difference]: Finished difference Result 3227 states and 9972 transitions. [2021-06-06 00:07:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:07:44,272 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 [2021-06-06 00:07:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:44,276 INFO L225 Difference]: With dead ends: 3227 [2021-06-06 00:07:44,277 INFO L226 Difference]: Without dead ends: 3182 [2021-06-06 00:07:44,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 4389.2ms TimeCoverageRelationStatistics Valid=669, Invalid=3363, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:07:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-06 00:07:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1395. [2021-06-06 00:07:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.33142037302726) internal successors, (4644), 1394 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4644 transitions. [2021-06-06 00:07:44,304 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4644 transitions. Word has length 26 [2021-06-06 00:07:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:44,304 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 4644 transitions. [2021-06-06 00:07:44,304 INFO L483 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) [2021-06-06 00:07:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4644 transitions. [2021-06-06 00:07:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:44,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:44,306 INFO L554 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] [2021-06-06 00:07:44,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-06 00:07:44,508 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:44,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-06 00:07:44,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:44,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155882205] [2021-06-06 00:07:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:45,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155882205] [2021-06-06 00:07:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155882205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:45,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308106032] [2021-06-06 00:07:45,063 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 [2021-06-06 00:07:45,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:07:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:45,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,661 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 [2021-06-06 00:07:45,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:45,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,676 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 [2021-06-06 00:07:45,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,684 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 [2021-06-06 00:07:45,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,692 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 [2021-06-06 00:07:45,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,699 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 [2021-06-06 00:07:45,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,707 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 [2021-06-06 00:07:45,708 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,715 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 [2021-06-06 00:07:45,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,733 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 [2021-06-06 00:07:45,734 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,743 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 32 treesize of output 16 [2021-06-06 00:07:45,744 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,752 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 [2021-06-06 00:07:45,753 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,760 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 16 [2021-06-06 00:07:45,761 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,768 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 [2021-06-06 00:07:45,769 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,776 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 [2021-06-06 00:07:45,777 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:45,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:45,782 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 [2021-06-06 00:07:45,782 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:45,809 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-06 00:07:45,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:45,810 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:07:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:45,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308106032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:45,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:45,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:07:45,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854001251] [2021-06-06 00:07:45,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:45,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:45,848 INFO L87 Difference]: Start difference. First operand 1395 states and 4644 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) [2021-06-06 00:07:46,403 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-06 00:07:46,710 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-06 00:07:46,847 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-06 00:07:47,018 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-06-06 00:07:47,304 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-06 00:07:47,652 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-06-06 00:07:47,929 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-06 00:07:48,111 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-06 00:07:48,539 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-06-06 00:07:48,862 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-06 00:07:49,472 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-06 00:07:49,669 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-06 00:07:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:49,924 INFO L93 Difference]: Finished difference Result 3009 states and 9476 transitions. [2021-06-06 00:07:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:07:49,925 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 [2021-06-06 00:07:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:49,929 INFO L225 Difference]: With dead ends: 3009 [2021-06-06 00:07:49,929 INFO L226 Difference]: Without dead ends: 2964 [2021-06-06 00:07:49,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4002.3ms TimeCoverageRelationStatistics Valid=601, Invalid=2705, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:07:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-06-06 00:07:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1398. [2021-06-06 00:07:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3335719398711525) internal successors, (4657), 1397 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4657 transitions. [2021-06-06 00:07:49,956 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4657 transitions. Word has length 26 [2021-06-06 00:07:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:49,956 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4657 transitions. [2021-06-06 00:07:49,956 INFO L483 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) [2021-06-06 00:07:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4657 transitions. [2021-06-06 00:07:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:49,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:49,958 INFO L554 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] [2021-06-06 00:07:50,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-06 00:07:50,159 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-06 00:07:50,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:50,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862994483] [2021-06-06 00:07:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:50,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:50,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862994483] [2021-06-06 00:07:50,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862994483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:50,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629960329] [2021-06-06 00:07:50,654 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 [2021-06-06 00:07:50,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:50,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:07:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:51,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,255 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-06 00:07:51,255 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 37 [2021-06-06 00:07:51,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,293 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-06 00:07:51,293 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 34 [2021-06-06 00:07:51,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,331 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-06-06 00:07:51,331 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 25 [2021-06-06 00:07:51,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:51,368 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 45 [2021-06-06 00:07:51,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,415 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-06-06 00:07:51,415 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 25 [2021-06-06 00:07:51,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,440 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,440 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 [2021-06-06 00:07:51,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,465 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,466 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 [2021-06-06 00:07:51,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,500 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-06 00:07:51,500 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 30 [2021-06-06 00:07:51,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,527 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,527 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 [2021-06-06 00:07:51,528 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,552 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:51,553 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,584 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-06 00:07:51,584 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 34 [2021-06-06 00:07:51,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,616 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,616 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 1 [2021-06-06 00:07:51,616 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,634 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,634 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 [2021-06-06 00:07:51,635 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,664 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-06 00:07:51,665 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,682 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,682 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 [2021-06-06 00:07:51,683 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,695 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:51,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:07:51,695 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,807 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-06-06 00:07:51,807 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.3 percent of original size [2021-06-06 00:07:51,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:51,809 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-06 00:07:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:51,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629960329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:51,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:51,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:07:51,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508527287] [2021-06-06 00:07:51,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:51,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:51,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:51,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:51,954 INFO L87 Difference]: Start difference. First operand 1398 states and 4657 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) [2021-06-06 00:07:52,384 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-06 00:07:52,560 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-06 00:07:52,693 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-06-06 00:07:53,052 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-06-06 00:07:53,225 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-06 00:07:53,850 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-06 00:07:54,362 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-06 00:07:54,690 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-06 00:07:54,894 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2021-06-06 00:07:55,271 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-06-06 00:07:55,537 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-06-06 00:07:55,673 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2021-06-06 00:07:55,937 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-06-06 00:07:56,172 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2021-06-06 00:07:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:56,853 INFO L93 Difference]: Finished difference Result 3194 states and 9881 transitions. [2021-06-06 00:07:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:07:56,853 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 [2021-06-06 00:07:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:56,858 INFO L225 Difference]: With dead ends: 3194 [2021-06-06 00:07:56,858 INFO L226 Difference]: Without dead ends: 3134 [2021-06-06 00:07:56,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4664.5ms TimeCoverageRelationStatistics Valid=743, Invalid=3039, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:07:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2021-06-06 00:07:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1411. [2021-06-06 00:07:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 3.3453900709219857) internal successors, (4717), 1410 states have internal predecessors, (4717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 4717 transitions. [2021-06-06 00:07:56,893 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 4717 transitions. Word has length 26 [2021-06-06 00:07:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:56,893 INFO L482 AbstractCegarLoop]: Abstraction has 1411 states and 4717 transitions. [2021-06-06 00:07:56,893 INFO L483 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) [2021-06-06 00:07:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 4717 transitions. [2021-06-06 00:07:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:56,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:56,895 INFO L554 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] [2021-06-06 00:07:57,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-06-06 00:07:57,096 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:57,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-06-06 00:07:57,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:57,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747937976] [2021-06-06 00:07:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:57,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:57,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747937976] [2021-06-06 00:07:57,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747937976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:57,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494740571] [2021-06-06 00:07:57,447 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 [2021-06-06 00:07:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:57,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,863 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 [2021-06-06 00:07:57,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,869 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 [2021-06-06 00:07:57,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,877 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 [2021-06-06 00:07:57,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,885 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 [2021-06-06 00:07:57,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:57,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,899 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 [2021-06-06 00:07:57,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,905 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 [2021-06-06 00:07:57,906 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:07:57,914 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,919 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 [2021-06-06 00:07:57,919 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:07:57,925 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:07:57,931 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,936 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 [2021-06-06 00:07:57,936 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,942 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 [2021-06-06 00:07:57,942 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,947 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:07:57,948 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:57,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:57,951 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 [2021-06-06 00:07:57,952 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:58,029 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:07:58,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:58,031 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:07:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:58,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494740571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:58,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:58,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:07:58,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141636855] [2021-06-06 00:07:58,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:07:58,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:58,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:07:58,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:07:58,102 INFO L87 Difference]: Start difference. First operand 1411 states and 4717 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) [2021-06-06 00:07:59,231 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-06 00:07:59,626 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 57 [2021-06-06 00:07:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:59,849 INFO L93 Difference]: Finished difference Result 1958 states and 6368 transitions. [2021-06-06 00:07:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:07:59,850 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 [2021-06-06 00:07:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:59,853 INFO L225 Difference]: With dead ends: 1958 [2021-06-06 00:07:59,853 INFO L226 Difference]: Without dead ends: 1943 [2021-06-06 00:07:59,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1880.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:07:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-06-06 00:07:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1455. [2021-06-06 00:07:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.343878954607978) internal successors, (4862), 1454 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4862 transitions. [2021-06-06 00:07:59,872 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4862 transitions. Word has length 26 [2021-06-06 00:07:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:59,872 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4862 transitions. [2021-06-06 00:07:59,872 INFO L483 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) [2021-06-06 00:07:59,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4862 transitions. [2021-06-06 00:07:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:59,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:59,874 INFO L554 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] [2021-06-06 00:08:00,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-06-06 00:08:00,075 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-06-06 00:08:00,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:00,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942751054] [2021-06-06 00:08:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:00,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942751054] [2021-06-06 00:08:00,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942751054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749699117] [2021-06-06 00:08:00,458 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 [2021-06-06 00:08:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:08:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:00,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:08:00,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:00,834 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-06 00:08:00,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:00,918 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:08:00,919 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 29 treesize of output 33 [2021-06-06 00:08:00,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:01,070 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-06 00:08:01,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:01,116 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:08:01,117 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-06 00:08:01,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:01,256 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-06 00:08:01,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:01,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,276 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 24 treesize of output 34 [2021-06-06 00:08:01,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:01,413 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-06 00:08:01,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:01,434 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:08:01,434 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 38 treesize of output 30 [2021-06-06 00:08:01,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:01,565 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-06 00:08:01,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:01,587 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:08:01,587 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 40 treesize of output 34 [2021-06-06 00:08:01,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:01,715 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-06 00:08:01,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:01,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,733 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 45 treesize of output 41 [2021-06-06 00:08:01,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:01,867 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-06 00:08:01,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:01,889 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:08:01,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-06 00:08:01,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:02,018 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:08:02,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:02,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:02,035 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 43 treesize of output 41 [2021-06-06 00:08:02,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:02,164 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:08:02,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:02,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:02,179 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-06-06 00:08:02,458 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-06 00:08:02,695 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-06 00:08:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:02,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749699117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:02,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:02,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:08:02,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833003548] [2021-06-06 00:08:02,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:02,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:02,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:02,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:02,787 INFO L87 Difference]: Start difference. First operand 1455 states and 4862 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) [2021-06-06 00:08:03,671 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 36 [2021-06-06 00:08:04,182 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 44 [2021-06-06 00:08:04,701 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:08:05,150 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-06 00:08:05,372 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-06 00:08:05,646 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-06 00:08:06,005 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-06 00:08:06,383 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-06 00:08:06,637 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-06-06 00:08:07,118 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2021-06-06 00:08:07,354 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-06-06 00:08:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:07,443 INFO L93 Difference]: Finished difference Result 2081 states and 6658 transitions. [2021-06-06 00:08:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:08:07,444 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 [2021-06-06 00:08:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:07,446 INFO L225 Difference]: With dead ends: 2081 [2021-06-06 00:08:07,447 INFO L226 Difference]: Without dead ends: 2051 [2021-06-06 00:08:07,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4957.3ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:08:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-06 00:08:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1451. [2021-06-06 00:08:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.3393103448275863) internal successors, (4842), 1450 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4842 transitions. [2021-06-06 00:08:07,484 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4842 transitions. Word has length 26 [2021-06-06 00:08:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:07,484 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4842 transitions. [2021-06-06 00:08:07,484 INFO L483 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) [2021-06-06 00:08:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4842 transitions. [2021-06-06 00:08:07,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:07,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:07,487 INFO L554 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] [2021-06-06 00:08:07,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:07,701 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1764992822, now seen corresponding path program 15 times [2021-06-06 00:08:07,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:07,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859738369] [2021-06-06 00:08:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:08,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:08,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859738369] [2021-06-06 00:08:08,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859738369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:08,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517741250] [2021-06-06 00:08:08,032 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 [2021-06-06 00:08:08,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:08:08,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:08,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:08:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:08,412 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,412 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:08:08,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:08,428 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 [2021-06-06 00:08:08,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,438 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,438 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 19 [2021-06-06 00:08:08,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,462 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:08,462 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 [2021-06-06 00:08:08,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,476 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,476 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 16 [2021-06-06 00:08:08,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,491 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,491 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 16 [2021-06-06 00:08:08,492 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:08,508 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 [2021-06-06 00:08:08,510 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,519 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,519 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 26 treesize of output 16 [2021-06-06 00:08:08,520 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,538 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:08,538 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 [2021-06-06 00:08:08,539 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:08,555 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 [2021-06-06 00:08:08,560 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,569 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,569 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 31 treesize of output 19 [2021-06-06 00:08:08,570 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,589 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:08,589 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 [2021-06-06 00:08:08,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,611 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:08,611 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 [2021-06-06 00:08:08,612 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,621 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,622 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 19 [2021-06-06 00:08:08,622 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,640 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:08,640 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 [2021-06-06 00:08:08,642 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,648 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:08,649 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,777 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-06 00:08:08,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:08,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:08,790 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-06-06 00:08:09,002 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-06 00:08:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:09,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517741250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:09,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:09,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:08:09,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964850214] [2021-06-06 00:08:09,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:09,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:09,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:09,122 INFO L87 Difference]: Start difference. First operand 1451 states and 4842 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) [2021-06-06 00:08:09,734 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-06-06 00:08:10,240 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-06-06 00:08:10,365 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-06-06 00:08:10,535 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-06 00:08:10,867 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2021-06-06 00:08:11,668 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-06 00:08:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:11,877 INFO L93 Difference]: Finished difference Result 2000 states and 6458 transitions. [2021-06-06 00:08:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:08:11,877 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 [2021-06-06 00:08:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:11,880 INFO L225 Difference]: With dead ends: 2000 [2021-06-06 00:08:11,880 INFO L226 Difference]: Without dead ends: 1985 [2021-06-06 00:08:11,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2744.1ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:08:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-06-06 00:08:11,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1452. [2021-06-06 00:08:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.3418332184700206) internal successors, (4849), 1451 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4849 transitions. [2021-06-06 00:08:11,900 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4849 transitions. Word has length 26 [2021-06-06 00:08:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:11,900 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4849 transitions. [2021-06-06 00:08:11,900 INFO L483 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) [2021-06-06 00:08:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4849 transitions. [2021-06-06 00:08:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:11,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:11,902 INFO L554 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] [2021-06-06 00:08:12,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:12,103 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 16 times [2021-06-06 00:08:12,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:12,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091706862] [2021-06-06 00:08:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:12,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:12,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091706862] [2021-06-06 00:08:12,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091706862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:12,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018645778] [2021-06-06 00:08:12,538 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 [2021-06-06 00:08:12,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:08:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:12,820 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 [2021-06-06 00:08:12,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:12,834 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 42 treesize of output 27 [2021-06-06 00:08:12,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:12,849 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 [2021-06-06 00:08:12,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,865 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:12,866 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 [2021-06-06 00:08:12,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:12,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:08:12,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:12,897 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 [2021-06-06 00:08:12,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,911 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:12,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:08:12,912 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:12,927 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 [2021-06-06 00:08:12,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:12,939 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 [2021-06-06 00:08:12,940 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,951 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:12,951 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 [2021-06-06 00:08:12,951 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,965 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:12,965 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 [2021-06-06 00:08:12,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,978 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:12,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:08:12,979 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:12,991 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:12,991 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 [2021-06-06 00:08:12,992 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:13,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:13,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:13,017 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 [2021-06-06 00:08:13,019 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:13,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:13,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:13,032 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:13,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:08:13,034 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:13,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:13,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,042 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:13,042 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 [2021-06-06 00:08:13,043 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:13,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:13,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:13,121 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-06 00:08:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:13,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018645778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:13,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:13,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:08:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864705625] [2021-06-06 00:08:13,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:13,327 INFO L87 Difference]: Start difference. First operand 1452 states and 4849 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) [2021-06-06 00:08:13,803 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 34 [2021-06-06 00:08:14,109 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-06-06 00:08:14,497 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-06 00:08:14,699 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2021-06-06 00:08:14,876 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-06 00:08:15,089 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-06 00:08:15,303 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-06-06 00:08:15,549 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-06-06 00:08:15,793 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-06 00:08:16,169 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-06 00:08:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:16,382 INFO L93 Difference]: Finished difference Result 2355 states and 7541 transitions. [2021-06-06 00:08:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:08:16,382 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 [2021-06-06 00:08:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:16,385 INFO L225 Difference]: With dead ends: 2355 [2021-06-06 00:08:16,385 INFO L226 Difference]: Without dead ends: 2325 [2021-06-06 00:08:16,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 3198.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:08:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-06-06 00:08:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1465. [2021-06-06 00:08:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-06-06 00:08:16,407 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-06-06 00:08:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:16,407 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-06-06 00:08:16,408 INFO L483 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) [2021-06-06 00:08:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-06-06 00:08:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:16,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:16,410 INFO L554 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] [2021-06-06 00:08:16,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:16,610 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-06-06 00:08:16,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:16,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120394524] [2021-06-06 00:08:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:17,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120394524] [2021-06-06 00:08:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120394524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350989750] [2021-06-06 00:08:17,002 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:17,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:08:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:17,375 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-06 00:08:17,560 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-06 00:08:17,631 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_46], 2=[A, v_prenex_45]} [2021-06-06 00:08:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:08:17,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,745 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-06 00:08:17,746 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-06 00:08:17,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:17,750 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 28 treesize of output 16 [2021-06-06 00:08:17,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:17,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:17,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:17,801 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 [2021-06-06 00:08:17,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:17,806 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 [2021-06-06 00:08:17,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:17,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:17,846 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-06 00:08:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350989750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:17,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:17,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:08:17,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002204677] [2021-06-06 00:08:17,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:17,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:17,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:17,903 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 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) [2021-06-06 00:08:18,831 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-06-06 00:08:18,992 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-06 00:08:19,342 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:08:19,705 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-06-06 00:08:19,902 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-06 00:08:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:20,104 INFO L93 Difference]: Finished difference Result 2028 states and 6589 transitions. [2021-06-06 00:08:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:08:20,104 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 [2021-06-06 00:08:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:20,107 INFO L225 Difference]: With dead ends: 2028 [2021-06-06 00:08:20,107 INFO L226 Difference]: Without dead ends: 1998 [2021-06-06 00:08:20,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2516.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:08:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-06 00:08:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1468. [2021-06-06 00:08:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3503749147920927) internal successors, (4915), 1467 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4915 transitions. [2021-06-06 00:08:20,130 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4915 transitions. Word has length 26 [2021-06-06 00:08:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:20,130 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4915 transitions. [2021-06-06 00:08:20,130 INFO L483 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) [2021-06-06 00:08:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4915 transitions. [2021-06-06 00:08:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:20,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:20,132 INFO L554 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] [2021-06-06 00:08:20,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:20,337 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-06-06 00:08:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:20,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855544887] [2021-06-06 00:08:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:20,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:20,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855544887] [2021-06-06 00:08:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855544887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:20,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680584902] [2021-06-06 00:08:20,781 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 [2021-06-06 00:08:20,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:08:20,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:20,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:08:20,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:21,163 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:08:21,350 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_54, v_prenex_64, v_prenex_58], 6=[A, v_prenex_60, v_prenex_62, v_prenex_56, v_prenex_66]} [2021-06-06 00:08:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:21,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:21,368 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 [2021-06-06 00:08:21,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:21,754 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2021-06-06 00:08:21,755 INFO L628 ElimStorePlain]: treesize reduction 272, result has 55.1 percent of original size [2021-06-06 00:08:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:21,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:21,769 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 [2021-06-06 00:08:21,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:21,898 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-06 00:08:21,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:21,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:21,912 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 [2021-06-06 00:08:21,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:22,054 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-06 00:08:22,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,068 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:08:22,069 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 [2021-06-06 00:08:22,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:22,185 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-06 00:08:22,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:22,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:22,312 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-06 00:08:22,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,325 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:08:22,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-06 00:08:22,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:22,433 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-06 00:08:22,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,446 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 26 [2021-06-06 00:08:22,450 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:22,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:22,561 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:08:22,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:22,562 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:22,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:22,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:22,665 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:621, output treesize:217 [2021-06-06 00:08:22,857 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-06 00:08:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:22,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680584902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:22,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:22,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:08:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180351426] [2021-06-06 00:08:22,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:22,952 INFO L87 Difference]: Start difference. First operand 1468 states and 4915 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) [2021-06-06 00:08:23,621 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-06-06 00:08:24,208 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-06 00:08:24,713 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-06 00:08:25,078 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-06 00:08:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:25,346 INFO L93 Difference]: Finished difference Result 1972 states and 6440 transitions. [2021-06-06 00:08:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:08:25,346 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 [2021-06-06 00:08:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:25,349 INFO L225 Difference]: With dead ends: 1972 [2021-06-06 00:08:25,349 INFO L226 Difference]: Without dead ends: 1957 [2021-06-06 00:08:25,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2840.6ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:08:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-06-06 00:08:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1465. [2021-06-06 00:08:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-06-06 00:08:25,376 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-06-06 00:08:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:25,376 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-06-06 00:08:25,376 INFO L483 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) [2021-06-06 00:08:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-06-06 00:08:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:25,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:25,379 INFO L554 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] [2021-06-06 00:08:25,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:25,593 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-06-06 00:08:25,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:25,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954158267] [2021-06-06 00:08:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:26,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:26,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954158267] [2021-06-06 00:08:26,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954158267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:26,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33784695] [2021-06-06 00:08:26,116 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 [2021-06-06 00:08:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:26,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:26,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,495 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 [2021-06-06 00:08:26,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,506 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 [2021-06-06 00:08:26,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,512 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 [2021-06-06 00:08:26,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,519 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 31 treesize of output 19 [2021-06-06 00:08:26,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,525 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 [2021-06-06 00:08:26,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,531 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 [2021-06-06 00:08:26,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,539 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 31 treesize of output 19 [2021-06-06 00:08:26,540 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:26,546 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,552 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 [2021-06-06 00:08:26,553 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:26,559 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,564 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 [2021-06-06 00:08:26,565 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,573 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 [2021-06-06 00:08:26,574 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,580 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 [2021-06-06 00:08:26,581 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,586 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 [2021-06-06 00:08:26,587 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:26,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:26,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:26,592 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:26,680 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:08:26,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:26,681 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:08:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33784695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:26,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:26,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:08:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292956854] [2021-06-06 00:08:26,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:26,732 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 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) [2021-06-06 00:08:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:27,611 INFO L93 Difference]: Finished difference Result 1916 states and 6261 transitions. [2021-06-06 00:08:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:08:27,611 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 [2021-06-06 00:08:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:27,614 INFO L225 Difference]: With dead ends: 1916 [2021-06-06 00:08:27,614 INFO L226 Difference]: Without dead ends: 1895 [2021-06-06 00:08:27,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1238.4ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:08:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-06-06 00:08:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1506. [2021-06-06 00:08:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.345514950166113) internal successors, (5035), 1505 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5035 transitions. [2021-06-06 00:08:27,632 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5035 transitions. Word has length 26 [2021-06-06 00:08:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:27,633 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5035 transitions. [2021-06-06 00:08:27,633 INFO L483 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) [2021-06-06 00:08:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5035 transitions. [2021-06-06 00:08:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:27,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:27,635 INFO L554 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] [2021-06-06 00:08:27,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-06-06 00:08:27,835 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-06-06 00:08:27,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:27,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863641907] [2021-06-06 00:08:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:28,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:28,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863641907] [2021-06-06 00:08:28,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863641907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:28,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246920891] [2021-06-06 00:08:28,349 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 [2021-06-06 00:08:28,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:08:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:28,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:29,000 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-06 00:08:29,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:29,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:29,041 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 [2021-06-06 00:08:29,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,532 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-06 00:08:29,533 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.3 percent of original size [2021-06-06 00:08:29,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:29,555 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 [2021-06-06 00:08:29,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,587 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:08:29,587 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 [2021-06-06 00:08:29,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,738 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:08:29,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:29,766 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:08:29,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:29,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,791 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:08:29,791 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 [2021-06-06 00:08:29,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,940 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-06 00:08:29,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:29,965 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-06 00:08:29,965 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 [2021-06-06 00:08:29,966 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,992 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-06 00:08:29,992 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 [2021-06-06 00:08:29,994 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:30,136 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-06 00:08:30,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:30,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:30,172 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:746 [2021-06-06 00:08:30,643 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-06 00:08:30,937 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-06 00:08:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246920891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:31,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:31,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-06 00:08:31,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767301271] [2021-06-06 00:08:31,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:31,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:31,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:31,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:31,059 INFO L87 Difference]: Start difference. First operand 1506 states and 5035 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) [2021-06-06 00:08:31,236 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2021-06-06 00:08:31,396 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 27 [2021-06-06 00:08:31,784 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2021-06-06 00:08:32,106 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 51 [2021-06-06 00:08:32,494 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2021-06-06 00:08:32,837 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2021-06-06 00:08:33,069 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-06 00:08:33,679 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-06-06 00:08:33,821 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-06 00:08:34,253 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 53 [2021-06-06 00:08:34,548 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-06 00:08:35,052 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-06-06 00:08:35,535 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-06 00:08:36,048 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2021-06-06 00:08:36,463 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-06-06 00:08:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:36,526 INFO L93 Difference]: Finished difference Result 2133 states and 6814 transitions. [2021-06-06 00:08:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:08:36,527 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 [2021-06-06 00:08:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:36,530 INFO L225 Difference]: With dead ends: 2133 [2021-06-06 00:08:36,530 INFO L226 Difference]: Without dead ends: 2108 [2021-06-06 00:08:36,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 6353.3ms TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:08:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-06 00:08:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1529. [2021-06-06 00:08:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.352094240837696) internal successors, (5122), 1528 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5122 transitions. [2021-06-06 00:08:36,554 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5122 transitions. Word has length 26 [2021-06-06 00:08:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:36,554 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5122 transitions. [2021-06-06 00:08:36,554 INFO L483 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) [2021-06-06 00:08:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5122 transitions. [2021-06-06 00:08:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:36,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:36,557 INFO L554 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] [2021-06-06 00:08:36,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-06-06 00:08:36,759 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:36,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-06-06 00:08:36,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:36,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244749314] [2021-06-06 00:08:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:37,074 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-06-06 00:08:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:37,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:37,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244749314] [2021-06-06 00:08:37,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244749314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:37,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179911314] [2021-06-06 00:08:37,298 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 [2021-06-06 00:08:37,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:08:37,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:08:37,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,667 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,667 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 36 treesize of output 22 [2021-06-06 00:08:37,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,678 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,678 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 [2021-06-06 00:08:37,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,689 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 [2021-06-06 00:08:37,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:37,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,716 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,716 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 [2021-06-06 00:08:37,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,725 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,725 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 [2021-06-06 00:08:37,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,737 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:37,737 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 [2021-06-06 00:08:37,739 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,748 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,748 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 [2021-06-06 00:08:37,748 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,760 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 [2021-06-06 00:08:37,761 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,772 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 [2021-06-06 00:08:37,774 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,783 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 [2021-06-06 00:08:37,784 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,795 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:37,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:37,796 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,820 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:37,820 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 [2021-06-06 00:08:37,821 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,830 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 [2021-06-06 00:08:37,831 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:37,841 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 28 treesize of output 16 [2021-06-06 00:08:37,841 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,856 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 [2021-06-06 00:08:37,857 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:37,948 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-06 00:08:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:38,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179911314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:38,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:38,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:08:38,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987123407] [2021-06-06 00:08:38,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:38,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:38,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:38,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:38,145 INFO L87 Difference]: Start difference. First operand 1529 states and 5122 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) [2021-06-06 00:08:38,426 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2021-06-06 00:08:39,227 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-06 00:08:39,410 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-06 00:08:39,663 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-06 00:08:39,822 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-06-06 00:08:40,131 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-06 00:08:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:40,185 INFO L93 Difference]: Finished difference Result 2011 states and 6582 transitions. [2021-06-06 00:08:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:08:40,185 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 [2021-06-06 00:08:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:40,188 INFO L225 Difference]: With dead ends: 2011 [2021-06-06 00:08:40,188 INFO L226 Difference]: Without dead ends: 1982 [2021-06-06 00:08:40,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2421.9ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:08:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-06-06 00:08:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1532. [2021-06-06 00:08:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3527106466361856) internal successors, (5133), 1531 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5133 transitions. [2021-06-06 00:08:40,208 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5133 transitions. Word has length 26 [2021-06-06 00:08:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:40,208 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5133 transitions. [2021-06-06 00:08:40,208 INFO L483 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) [2021-06-06 00:08:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5133 transitions. [2021-06-06 00:08:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:40,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:40,210 INFO L554 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] [2021-06-06 00:08:40,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-06-06 00:08:40,413 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-06-06 00:08:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:40,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250779923] [2021-06-06 00:08:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:40,713 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-06 00:08:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:40,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250779923] [2021-06-06 00:08:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250779923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370088383] [2021-06-06 00:08:40,924 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 [2021-06-06 00:08:40,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:08:40,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:40,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:40,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:41,327 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-06 00:08:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:41,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:41,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:41,394 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 [2021-06-06 00:08:41,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:41,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:41,401 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 [2021-06-06 00:08:41,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:41,527 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-06 00:08:41,527 INFO L628 ElimStorePlain]: treesize reduction 91, result has 58.6 percent of original size [2021-06-06 00:08:41,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:41,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:08:41,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:41,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:41,577 INFO L518 ElimStorePlain]: Eliminatee v_prenex_87 vanished before elimination [2021-06-06 00:08:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:41,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:41,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:41,582 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 [2021-06-06 00:08:41,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:41,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:41,586 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 [2021-06-06 00:08:41,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:41,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:41,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:41,626 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:272, output treesize:51 [2021-06-06 00:08:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:41,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370088383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:41,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:41,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:08:41,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718617593] [2021-06-06 00:08:41,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:08:41,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:41,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:08:41,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:08:41,684 INFO L87 Difference]: Start difference. First operand 1532 states and 5133 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) [2021-06-06 00:08:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:42,001 INFO L93 Difference]: Finished difference Result 1607 states and 5324 transitions. [2021-06-06 00:08:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:08:42,001 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 [2021-06-06 00:08:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:42,003 INFO L225 Difference]: With dead ends: 1607 [2021-06-06 00:08:42,003 INFO L226 Difference]: Without dead ends: 1592 [2021-06-06 00:08:42,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 863.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-06 00:08:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1538. [2021-06-06 00:08:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3545868575146387) internal successors, (5156), 1537 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5156 transitions. [2021-06-06 00:08:42,021 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5156 transitions. Word has length 26 [2021-06-06 00:08:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:42,021 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 5156 transitions. [2021-06-06 00:08:42,021 INFO L483 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) [2021-06-06 00:08:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5156 transitions. [2021-06-06 00:08:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:42,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:42,023 INFO L554 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] [2021-06-06 00:08:42,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:42,224 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-06-06 00:08:42,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:42,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816280897] [2021-06-06 00:08:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:42,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:42,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816280897] [2021-06-06 00:08:42,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816280897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:42,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583140043] [2021-06-06 00:08:42,642 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 [2021-06-06 00:08:42,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:08:42,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:42,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:08:42,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:43,197 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 [2021-06-06 00:08:43,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,221 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:43,221 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 [2021-06-06 00:08:43,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:43,368 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-06 00:08:43,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,392 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:43,392 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 [2021-06-06 00:08:43,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,416 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:43,416 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 [2021-06-06 00:08:43,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:43,566 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:08:43,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:43,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:43,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,608 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:43,608 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 [2021-06-06 00:08:43,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:43,890 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-06 00:08:43,891 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-06-06 00:08:43,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:43,907 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:08:43,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:43,930 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:43,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:08:43,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:44,175 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-06 00:08:44,176 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-06-06 00:08:44,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:44,208 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-06-06 00:08:44,418 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-06 00:08:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:44,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583140043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:44,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:44,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:08:44,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082450163] [2021-06-06 00:08:44,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:44,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:44,517 INFO L87 Difference]: Start difference. First operand 1538 states and 5156 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) [2021-06-06 00:08:45,388 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-06 00:08:46,101 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-06-06 00:08:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:46,153 INFO L93 Difference]: Finished difference Result 2227 states and 7222 transitions. [2021-06-06 00:08:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:08:46,153 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 [2021-06-06 00:08:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:46,156 INFO L225 Difference]: With dead ends: 2227 [2021-06-06 00:08:46,156 INFO L226 Difference]: Without dead ends: 2177 [2021-06-06 00:08:46,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2095.5ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:08:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-06-06 00:08:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1545. [2021-06-06 00:08:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3588082901554404) internal successors, (5186), 1544 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5186 transitions. [2021-06-06 00:08:46,176 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5186 transitions. Word has length 26 [2021-06-06 00:08:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:46,176 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5186 transitions. [2021-06-06 00:08:46,176 INFO L483 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) [2021-06-06 00:08:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5186 transitions. [2021-06-06 00:08:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:46,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:46,178 INFO L554 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] [2021-06-06 00:08:46,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-06-06 00:08:46,378 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:46,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-06-06 00:08:46,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:46,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631300062] [2021-06-06 00:08:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:46,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:46,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631300062] [2021-06-06 00:08:46,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631300062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:46,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930197820] [2021-06-06 00:08:46,862 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:46,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:08:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,108 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,109 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 [2021-06-06 00:08:47,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:47,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:47,132 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 [2021-06-06 00:08:47,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,144 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:08:47,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:47,156 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 [2021-06-06 00:08:47,159 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:47,171 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 [2021-06-06 00:08:47,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,180 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 [2021-06-06 00:08:47,181 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:47,191 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 [2021-06-06 00:08:47,195 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,204 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,204 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 [2021-06-06 00:08:47,205 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:47,216 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 [2021-06-06 00:08:47,217 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,226 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 [2021-06-06 00:08:47,227 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,236 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,237 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 [2021-06-06 00:08:47,237 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,251 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:47,252 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 [2021-06-06 00:08:47,253 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,264 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:47,264 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 [2021-06-06 00:08:47,265 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,276 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:47,276 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 [2021-06-06 00:08:47,277 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:47,282 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:47,282 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 31 treesize of output 19 [2021-06-06 00:08:47,283 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:47,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:47,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:47,359 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:08:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:47,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930197820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:47,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:47,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:08:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964534985] [2021-06-06 00:08:47,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:47,547 INFO L87 Difference]: Start difference. First operand 1545 states and 5186 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) [2021-06-06 00:08:48,148 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-06-06 00:08:48,743 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-06-06 00:08:49,246 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-06 00:08:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:49,316 INFO L93 Difference]: Finished difference Result 2071 states and 6812 transitions. [2021-06-06 00:08:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:08:49,316 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 [2021-06-06 00:08:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:49,319 INFO L225 Difference]: With dead ends: 2071 [2021-06-06 00:08:49,319 INFO L226 Difference]: Without dead ends: 2052 [2021-06-06 00:08:49,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2083.8ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:08:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-06-06 00:08:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1557. [2021-06-06 00:08:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3618251928020566) internal successors, (5231), 1556 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5231 transitions. [2021-06-06 00:08:49,352 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5231 transitions. Word has length 26 [2021-06-06 00:08:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:49,352 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 5231 transitions. [2021-06-06 00:08:49,352 INFO L483 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) [2021-06-06 00:08:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5231 transitions. [2021-06-06 00:08:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:49,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:49,354 INFO L554 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] [2021-06-06 00:08:49,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-06 00:08:49,556 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-06-06 00:08:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:49,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293440601] [2021-06-06 00:08:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:49,914 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-06 00:08:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:50,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:50,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293440601] [2021-06-06 00:08:50,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293440601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:50,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65020383] [2021-06-06 00:08:50,025 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 [2021-06-06 00:08:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:08:50,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:50,407 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-06 00:08:50,502 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_98], 3=[A, v_prenex_100], 6=[v_prenex_99]} [2021-06-06 00:08:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:50,516 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 [2021-06-06 00:08:50,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:50,528 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 [2021-06-06 00:08:50,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:50,688 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-06 00:08:50,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:50,702 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 [2021-06-06 00:08:50,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:50,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,715 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:08:50,715 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 [2021-06-06 00:08:50,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:50,855 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-06 00:08:50,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,868 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:08:50,868 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 [2021-06-06 00:08:50,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:50,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:50,880 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 [2021-06-06 00:08:50,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,005 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-06 00:08:51,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:51,020 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:08:51,020 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 32 treesize of output 22 [2021-06-06 00:08:51,021 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,039 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 26 [2021-06-06 00:08:51,053 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,195 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:08:51,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:51,204 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:375, output treesize:228 [2021-06-06 00:08:51,388 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-06 00:08:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:51,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65020383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:51,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:51,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:08:51,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395534060] [2021-06-06 00:08:51,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:51,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:51,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:51,489 INFO L87 Difference]: Start difference. First operand 1557 states and 5231 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) [2021-06-06 00:08:51,638 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 28 [2021-06-06 00:08:52,080 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-06-06 00:08:52,371 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-06 00:08:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:52,928 INFO L93 Difference]: Finished difference Result 2052 states and 6751 transitions. [2021-06-06 00:08:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:08:52,928 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 [2021-06-06 00:08:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:52,931 INFO L225 Difference]: With dead ends: 2052 [2021-06-06 00:08:52,931 INFO L226 Difference]: Without dead ends: 2027 [2021-06-06 00:08:52,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1899.0ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:08:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-06 00:08:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1563. [2021-06-06 00:08:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.360435339308579) internal successors, (5249), 1562 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5249 transitions. [2021-06-06 00:08:52,950 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5249 transitions. Word has length 26 [2021-06-06 00:08:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:52,950 INFO L482 AbstractCegarLoop]: Abstraction has 1563 states and 5249 transitions. [2021-06-06 00:08:52,950 INFO L483 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) [2021-06-06 00:08:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5249 transitions. [2021-06-06 00:08:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:52,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:52,952 INFO L554 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] [2021-06-06 00:08:53,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-06-06 00:08:53,153 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-06 00:08:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:53,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141097335] [2021-06-06 00:08:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:53,440 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-06 00:08:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:53,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141097335] [2021-06-06 00:08:53,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141097335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657839942] [2021-06-06 00:08:53,741 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 [2021-06-06 00:08:53,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:08:53,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:53,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:08:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:54,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,110 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 [2021-06-06 00:08:54,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,121 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 [2021-06-06 00:08:54,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,131 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 [2021-06-06 00:08:54,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,141 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-06 00:08:54,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,152 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 [2021-06-06 00:08:54,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,162 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 [2021-06-06 00:08:54,164 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,173 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 [2021-06-06 00:08:54,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,184 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 16 [2021-06-06 00:08:54,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,193 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 [2021-06-06 00:08:54,193 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,200 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-06 00:08:54,201 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,208 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 [2021-06-06 00:08:54,209 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,217 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 [2021-06-06 00:08:54,218 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,226 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 16 [2021-06-06 00:08:54,226 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,234 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 [2021-06-06 00:08:54,235 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,241 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 25 treesize of output 7 [2021-06-06 00:08:54,243 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:54,247 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:08:54,247 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,285 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.0 percent of original size [2021-06-06 00:08:54,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:08:54,286 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:809, output treesize:39 [2021-06-06 00:08:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:54,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657839942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:54,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:54,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:08:54,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910070138] [2021-06-06 00:08:54,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:54,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:54,350 INFO L87 Difference]: Start difference. First operand 1563 states and 5249 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) [2021-06-06 00:08:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:55,345 INFO L93 Difference]: Finished difference Result 2040 states and 6673 transitions. [2021-06-06 00:08:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:08:55,346 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 [2021-06-06 00:08:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:55,348 INFO L225 Difference]: With dead ends: 2040 [2021-06-06 00:08:55,348 INFO L226 Difference]: Without dead ends: 2014 [2021-06-06 00:08:55,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1514.3ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:08:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-06 00:08:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1579. [2021-06-06 00:08:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-06-06 00:08:55,368 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-06-06 00:08:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:55,368 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-06-06 00:08:55,368 INFO L483 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) [2021-06-06 00:08:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-06-06 00:08:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:55,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:55,370 INFO L554 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] [2021-06-06 00:08:55,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:55,570 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-06 00:08:55,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:55,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361256142] [2021-06-06 00:08:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:56,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:56,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361256142] [2021-06-06 00:08:56,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361256142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:56,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56997200] [2021-06-06 00:08:56,032 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:56,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:56,396 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_103], 5=[v_prenex_101, v_prenex_105]} [2021-06-06 00:08:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:56,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:56,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:56,404 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 [2021-06-06 00:08:56,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:56,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:56,410 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 28 treesize of output 13 [2021-06-06 00:08:56,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:56,494 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-06-06 00:08:56,494 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-06 00:08:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:56,498 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:08:56,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:56,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:56,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:56,531 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 [2021-06-06 00:08:56,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:56,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:56,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:08:56,560 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-06-06 00:08:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56997200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:56,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:56,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:08:56,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519896219] [2021-06-06 00:08:56,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:56,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:56,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:56,607 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 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) [2021-06-06 00:08:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:59,251 INFO L93 Difference]: Finished difference Result 2239 states and 7310 transitions. [2021-06-06 00:08:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:08:59,251 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 [2021-06-06 00:08:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:59,254 INFO L225 Difference]: With dead ends: 2239 [2021-06-06 00:08:59,254 INFO L226 Difference]: Without dead ends: 2224 [2021-06-06 00:08:59,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2843.8ms TimeCoverageRelationStatistics Valid=512, Invalid=2244, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:08:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-06 00:08:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1579. [2021-06-06 00:08:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-06-06 00:08:59,278 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-06-06 00:08:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:59,278 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-06-06 00:08:59,278 INFO L483 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) [2021-06-06 00:08:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-06-06 00:08:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:59,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:59,280 INFO L554 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] [2021-06-06 00:08:59,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-06-06 00:08:59,497 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-06-06 00:08:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:59,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683740917] [2021-06-06 00:08:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:59,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683740917] [2021-06-06 00:08:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683740917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446957127] [2021-06-06 00:08:59,946 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:59,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:08:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:00,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,203 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,203 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 [2021-06-06 00:09:00,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,212 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:00,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:00,223 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 [2021-06-06 00:09:00,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,233 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,233 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 [2021-06-06 00:09:00,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:00,244 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 [2021-06-06 00:09:00,247 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:00,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:00,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,267 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:00,268 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:00,279 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 [2021-06-06 00:09:00,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,291 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,291 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 [2021-06-06 00:09:00,292 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:00,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:00,303 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,312 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 33 treesize of output 19 [2021-06-06 00:09:00,313 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,321 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 [2021-06-06 00:09:00,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,332 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:00,332 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 21 treesize of output 17 [2021-06-06 00:09:00,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,344 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:00,344 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 [2021-06-06 00:09:00,345 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,356 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:00,356 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 [2021-06-06 00:09:00,357 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:00,363 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 [2021-06-06 00:09:00,364 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:00,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:00,439 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:09:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:00,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446957127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:00,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:00,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:09:00,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274313046] [2021-06-06 00:09:00,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:00,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:00,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:00,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:00,627 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 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) [2021-06-06 00:09:02,218 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-06 00:09:02,411 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-06-06 00:09:02,726 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:09:02,956 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-06 00:09:03,229 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-06 00:09:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:03,286 INFO L93 Difference]: Finished difference Result 2206 states and 7151 transitions. [2021-06-06 00:09:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:09:03,286 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 [2021-06-06 00:09:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:03,289 INFO L225 Difference]: With dead ends: 2206 [2021-06-06 00:09:03,289 INFO L226 Difference]: Without dead ends: 2187 [2021-06-06 00:09:03,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2822.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:09:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-06 00:09:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1585. [2021-06-06 00:09:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-06-06 00:09:03,309 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-06-06 00:09:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:03,310 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-06-06 00:09:03,310 INFO L483 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) [2021-06-06 00:09:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-06-06 00:09:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:03,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:03,312 INFO L554 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] [2021-06-06 00:09:03,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1469,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:03,512 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-06 00:09:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:03,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078722825] [2021-06-06 00:09:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:04,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:04,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078722825] [2021-06-06 00:09:04,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078722825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:04,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377566758] [2021-06-06 00:09:04,122 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:04,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:04,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:09:04,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:04,509 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-06 00:09:04,854 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_118, A], 5=[v_prenex_120, v_prenex_116]} [2021-06-06 00:09:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:04,877 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:04,877 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 [2021-06-06 00:09:04,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:04,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:04,895 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 [2021-06-06 00:09:04,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,065 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-06 00:09:05,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,089 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:05,090 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 [2021-06-06 00:09:05,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,111 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:05,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:05,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,271 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-06 00:09:05,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:05,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,293 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:05,293 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 [2021-06-06 00:09:05,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:05,313 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 [2021-06-06 00:09:05,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,462 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:09:05,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:05,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,487 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:05,487 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 [2021-06-06 00:09:05,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,507 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:05,507 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 [2021-06-06 00:09:05,510 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,638 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:09:05,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:05,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:05,650 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-06-06 00:09:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:05,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377566758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:05,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:05,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:09:05,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873381559] [2021-06-06 00:09:05,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:09:05,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:05,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:09:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:09:05,805 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 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) [2021-06-06 00:09:06,478 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-06-06 00:09:07,313 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-06 00:09:08,287 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-06-06 00:09:08,755 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-06 00:09:08,917 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-06 00:09:09,524 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-06-06 00:09:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:09,915 INFO L93 Difference]: Finished difference Result 2573 states and 8159 transitions. [2021-06-06 00:09:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:09:09,915 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 [2021-06-06 00:09:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:09,918 INFO L225 Difference]: With dead ends: 2573 [2021-06-06 00:09:09,919 INFO L226 Difference]: Without dead ends: 2529 [2021-06-06 00:09:09,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4511.9ms TimeCoverageRelationStatistics Valid=671, Invalid=3361, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:09:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-06-06 00:09:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1585. [2021-06-06 00:09:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-06-06 00:09:09,940 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-06-06 00:09:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:09,941 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-06-06 00:09:09,941 INFO L483 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) [2021-06-06 00:09:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-06-06 00:09:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:09,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:09,943 INFO L554 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] [2021-06-06 00:09:10,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-06-06 00:09:10,143 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:10,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-06-06 00:09:10,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:10,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394459056] [2021-06-06 00:09:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:10,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:10,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394459056] [2021-06-06 00:09:10,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394459056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:10,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113190338] [2021-06-06 00:09:10,561 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:10,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:09:10,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,180 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:09:11,181 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 33 [2021-06-06 00:09:11,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:11,212 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 [2021-06-06 00:09:11,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,246 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:09:11,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-06-06 00:09:11,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,273 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:09:11,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:11,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,293 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,293 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 [2021-06-06 00:09:11,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,312 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,312 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 [2021-06-06 00:09:11,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,329 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,329 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 [2021-06-06 00:09:11,330 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,348 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,348 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 43 treesize of output 1 [2021-06-06 00:09:11,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,374 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:09:11,374 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 [2021-06-06 00:09:11,375 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,401 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-06 00:09:11,401 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 25 [2021-06-06 00:09:11,403 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,421 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,421 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 1 [2021-06-06 00:09:11,421 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,439 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,439 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 [2021-06-06 00:09:11,440 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,456 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,457 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 [2021-06-06 00:09:11,457 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,474 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,474 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 43 treesize of output 1 [2021-06-06 00:09:11,474 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,499 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-06 00:09:11,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-06-06 00:09:11,500 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,510 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:11,510 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 [2021-06-06 00:09:11,511 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,649 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-06-06 00:09:11,649 INFO L628 ElimStorePlain]: treesize reduction 76, result has 67.7 percent of original size [2021-06-06 00:09:11,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:11,652 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-06-06 00:09:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:11,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113190338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:11,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:11,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:09:11,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590975755] [2021-06-06 00:09:11,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:09:11,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:09:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:09:11,801 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-06-06 00:09:13,026 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-06 00:09:13,481 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-06 00:09:13,605 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-06 00:09:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:14,999 INFO L93 Difference]: Finished difference Result 3102 states and 9804 transitions. [2021-06-06 00:09:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:09:14,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 [2021-06-06 00:09:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:15,003 INFO L225 Difference]: With dead ends: 3102 [2021-06-06 00:09:15,003 INFO L226 Difference]: Without dead ends: 3072 [2021-06-06 00:09:15,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 3135.9ms TimeCoverageRelationStatistics Valid=533, Invalid=3007, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:09:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-06-06 00:09:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1645. [2021-06-06 00:09:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3619221411192215) internal successors, (5527), 1644 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5527 transitions. [2021-06-06 00:09:15,030 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5527 transitions. Word has length 26 [2021-06-06 00:09:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:15,030 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5527 transitions. [2021-06-06 00:09:15,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-06-06 00:09:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5527 transitions. [2021-06-06 00:09:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:15,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:15,032 INFO L554 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] [2021-06-06 00:09:15,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1554 [2021-06-06 00:09:15,235 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:15,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-06-06 00:09:15,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:15,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36090106] [2021-06-06 00:09:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:15,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:15,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36090106] [2021-06-06 00:09:15,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36090106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:15,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408805970] [2021-06-06 00:09:15,688 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 [2021-06-06 00:09:15,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:15,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:09:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:16,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,244 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 [2021-06-06 00:09:16,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,252 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 [2021-06-06 00:09:16,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,261 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 39 treesize of output 13 [2021-06-06 00:09:16,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,269 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 [2021-06-06 00:09:16,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,277 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 [2021-06-06 00:09:16,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,286 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 [2021-06-06 00:09:16,287 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,294 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 [2021-06-06 00:09:16,295 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,302 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 [2021-06-06 00:09:16,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,310 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 [2021-06-06 00:09:16,311 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:16,319 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,326 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 [2021-06-06 00:09:16,327 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,334 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 [2021-06-06 00:09:16,335 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,342 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 35 treesize of output 19 [2021-06-06 00:09:16,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,350 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 [2021-06-06 00:09:16,351 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:16,355 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 [2021-06-06 00:09:16,355 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,380 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-06-06 00:09:16,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:16,382 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:09:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408805970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:16,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:16,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-06 00:09:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061192157] [2021-06-06 00:09:16,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:16,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:16,403 INFO L87 Difference]: Start difference. First operand 1645 states and 5527 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) [2021-06-06 00:09:18,006 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-06 00:09:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:18,685 INFO L93 Difference]: Finished difference Result 3253 states and 10418 transitions. [2021-06-06 00:09:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:09:18,685 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 [2021-06-06 00:09:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:18,689 INFO L225 Difference]: With dead ends: 3253 [2021-06-06 00:09:18,690 INFO L226 Difference]: Without dead ends: 3217 [2021-06-06 00:09:18,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2213.9ms TimeCoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:09:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-06-06 00:09:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 1763. [2021-06-06 00:09:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.388195232690125) internal successors, (5970), 1762 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5970 transitions. [2021-06-06 00:09:18,716 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5970 transitions. Word has length 26 [2021-06-06 00:09:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:18,717 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 5970 transitions. [2021-06-06 00:09:18,717 INFO L483 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) [2021-06-06 00:09:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5970 transitions. [2021-06-06 00:09:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:18,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:18,719 INFO L554 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] [2021-06-06 00:09:18,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-06-06 00:09:18,919 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-06-06 00:09:18,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:18,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160457251] [2021-06-06 00:09:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:19,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:19,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160457251] [2021-06-06 00:09:19,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160457251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:19,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596706108] [2021-06-06 00:09:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:19,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:09:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:09:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,970 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:09:19,970 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 [2021-06-06 00:09:19,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,996 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-06 00:09:19,996 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 [2021-06-06 00:09:19,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,026 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:20,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-06 00:09:20,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,053 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:09:20,053 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 [2021-06-06 00:09:20,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,079 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:09:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-06 00:09:20,080 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,096 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:20,096 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 39 treesize of output 1 [2021-06-06 00:09:20,097 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,123 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:09:20,123 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 [2021-06-06 00:09:20,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,151 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:09:20,151 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 30 treesize of output 26 [2021-06-06 00:09:20,152 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:20,176 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 [2021-06-06 00:09:20,182 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,206 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:09:20,206 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 [2021-06-06 00:09:20,208 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,246 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:20,246 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 [2021-06-06 00:09:20,251 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,266 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:20,266 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 [2021-06-06 00:09:20,266 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,281 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:20,281 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 [2021-06-06 00:09:20,282 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,296 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:20,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:20,296 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,312 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:20,312 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 [2021-06-06 00:09:20,313 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:20,322 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:20,322 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 [2021-06-06 00:09:20,322 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:20,433 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-06-06 00:09:20,433 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.8 percent of original size [2021-06-06 00:09:20,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:20,435 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-06-06 00:09:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:20,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596706108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:20,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:20,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-06 00:09:20,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230710197] [2021-06-06 00:09:20,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:20,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:20,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:20,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:20,519 INFO L87 Difference]: Start difference. First operand 1763 states and 5970 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) [2021-06-06 00:09:22,296 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-06 00:09:22,536 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-06 00:09:22,763 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-06 00:09:23,279 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-06-06 00:09:23,499 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-06-06 00:09:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:23,729 INFO L93 Difference]: Finished difference Result 3738 states and 11851 transitions. [2021-06-06 00:09:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:09:23,730 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 [2021-06-06 00:09:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:23,735 INFO L225 Difference]: With dead ends: 3738 [2021-06-06 00:09:23,735 INFO L226 Difference]: Without dead ends: 3681 [2021-06-06 00:09:23,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3242.7ms TimeCoverageRelationStatistics Valid=639, Invalid=2553, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:09:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-06-06 00:09:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 1801. [2021-06-06 00:09:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.397777777777778) internal successors, (6116), 1800 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6116 transitions. [2021-06-06 00:09:23,768 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6116 transitions. Word has length 26 [2021-06-06 00:09:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:23,769 INFO L482 AbstractCegarLoop]: Abstraction has 1801 states and 6116 transitions. [2021-06-06 00:09:23,769 INFO L483 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) [2021-06-06 00:09:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6116 transitions. [2021-06-06 00:09:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:23,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:23,784 INFO L554 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] [2021-06-06 00:09:24,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1766,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:24,006 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-06-06 00:09:24,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:24,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800978149] [2021-06-06 00:09:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:24,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:24,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800978149] [2021-06-06 00:09:24,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800978149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:24,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634255026] [2021-06-06 00:09:24,578 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 [2021-06-06 00:09:24,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:09:24,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:09:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:25,056 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-06 00:09:25,299 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:09:25,435 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:25,435 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 [2021-06-06 00:09:25,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,568 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-06 00:09:25,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:25,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:25,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:25,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,723 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-06 00:09:25,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:25,744 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:25,744 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 [2021-06-06 00:09:25,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,884 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-06 00:09:25,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:25,905 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:25,905 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 [2021-06-06 00:09:25,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,044 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-06 00:09:26,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,060 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 [2021-06-06 00:09:26,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,194 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-06 00:09:26,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,211 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 [2021-06-06 00:09:26,212 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,347 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-06 00:09:26,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,378 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:26,379 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 [2021-06-06 00:09:26,382 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,508 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:09:26,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,525 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:26,525 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 [2021-06-06 00:09:26,526 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,649 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:09:26,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:26,662 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:357 [2021-06-06 00:09:26,875 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-06 00:09:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:26,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634255026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:26,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:26,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:09:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150290233] [2021-06-06 00:09:27,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:27,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:27,000 INFO L87 Difference]: Start difference. First operand 1801 states and 6116 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) [2021-06-06 00:09:27,894 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-06 00:09:28,099 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-06 00:09:28,335 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-06 00:09:28,601 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-06 00:09:28,842 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-06 00:09:29,083 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-06 00:09:29,583 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-06 00:09:29,995 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2021-06-06 00:09:30,592 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 67 [2021-06-06 00:09:31,056 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-06-06 00:09:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:31,230 INFO L93 Difference]: Finished difference Result 2391 states and 7895 transitions. [2021-06-06 00:09:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:09:31,230 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 [2021-06-06 00:09:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:31,234 INFO L225 Difference]: With dead ends: 2391 [2021-06-06 00:09:31,234 INFO L226 Difference]: Without dead ends: 2361 [2021-06-06 00:09:31,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4701.2ms TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:09:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-06 00:09:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1809. [2021-06-06 00:09:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.396017699115044) internal successors, (6140), 1808 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6140 transitions. [2021-06-06 00:09:31,273 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6140 transitions. Word has length 26 [2021-06-06 00:09:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:31,273 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 6140 transitions. [2021-06-06 00:09:31,273 INFO L483 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) [2021-06-06 00:09:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6140 transitions. [2021-06-06 00:09:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:31,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:31,276 INFO L554 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] [2021-06-06 00:09:31,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1867 [2021-06-06 00:09:31,476 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-06-06 00:09:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:31,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864580515] [2021-06-06 00:09:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:31,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:31,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864580515] [2021-06-06 00:09:31,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864580515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:31,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383774877] [2021-06-06 00:09:31,882 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 [2021-06-06 00:09:31,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:31,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:09:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:32,304 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:09:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:32,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,375 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 [2021-06-06 00:09:32,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:32,491 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-06 00:09:32,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:32,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:32,505 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 28 treesize of output 20 [2021-06-06 00:09:32,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:32,614 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-06 00:09:32,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:32,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:32,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:32,733 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-06 00:09:32,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:32,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,759 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 [2021-06-06 00:09:32,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:32,865 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-06 00:09:32,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:32,877 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:32,877 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 [2021-06-06 00:09:32,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:32,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:32,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:32,989 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 [2021-06-06 00:09:32,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:33,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:33,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:33,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,208 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:33,208 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 [2021-06-06 00:09:33,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:33,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:33,307 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-06 00:09:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:33,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383774877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:33,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:33,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:09:33,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349047694] [2021-06-06 00:09:33,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:33,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:33,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:33,496 INFO L87 Difference]: Start difference. First operand 1809 states and 6140 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) [2021-06-06 00:09:33,811 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-06 00:09:34,332 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-06 00:09:34,730 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-06-06 00:09:34,881 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-06 00:09:35,144 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-06 00:09:35,629 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-06 00:09:35,846 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-06 00:09:36,103 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-06 00:09:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:36,203 INFO L93 Difference]: Finished difference Result 2637 states and 8679 transitions. [2021-06-06 00:09:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:09:36,203 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 [2021-06-06 00:09:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:36,207 INFO L225 Difference]: With dead ends: 2637 [2021-06-06 00:09:36,207 INFO L226 Difference]: Without dead ends: 2603 [2021-06-06 00:09:36,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3015.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:09:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-06 00:09:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1822. [2021-06-06 00:09:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-06-06 00:09:36,232 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-06-06 00:09:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:36,232 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-06-06 00:09:36,232 INFO L483 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) [2021-06-06 00:09:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-06-06 00:09:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:36,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:36,235 INFO L554 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] [2021-06-06 00:09:36,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:36,435 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-06-06 00:09:36,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:36,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771025017] [2021-06-06 00:09:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:36,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771025017] [2021-06-06 00:09:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771025017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764125682] [2021-06-06 00:09:36,742 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 [2021-06-06 00:09:36,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:09:36,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:09:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:37,099 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-06 00:09:37,299 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_156, v_prenex_158], 6=[v_prenex_157]} [2021-06-06 00:09:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,329 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:37,329 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 [2021-06-06 00:09:37,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,357 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:37,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:37,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,518 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-06 00:09:37,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:37,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,560 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:37,560 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 [2021-06-06 00:09:37,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,713 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-06 00:09:37,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,732 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 [2021-06-06 00:09:37,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,755 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:37,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:37,756 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:38,043 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-06-06 00:09:38,043 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-06-06 00:09:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:38,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:38,065 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:38,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 24 [2021-06-06 00:09:38,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:38,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:38,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:38,080 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 32 [2021-06-06 00:09:38,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:38,349 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-06 00:09:38,349 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-06-06 00:09:38,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:38,368 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:373, output treesize:323 [2021-06-06 00:09:38,591 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-06 00:09:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764125682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:38,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:38,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:09:38,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040395546] [2021-06-06 00:09:38,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:38,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:38,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:38,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:38,690 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 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) [2021-06-06 00:09:38,839 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 27 [2021-06-06 00:09:39,669 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-06-06 00:09:40,856 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-06 00:09:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:40,903 INFO L93 Difference]: Finished difference Result 2416 states and 8045 transitions. [2021-06-06 00:09:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:09:40,903 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 [2021-06-06 00:09:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:40,907 INFO L225 Difference]: With dead ends: 2416 [2021-06-06 00:09:40,907 INFO L226 Difference]: Without dead ends: 2391 [2021-06-06 00:09:40,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2463.5ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:09:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-06 00:09:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1822. [2021-06-06 00:09:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-06-06 00:09:40,930 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-06-06 00:09:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:40,930 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-06-06 00:09:40,930 INFO L483 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) [2021-06-06 00:09:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-06-06 00:09:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:40,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:40,932 INFO L554 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] [2021-06-06 00:09:41,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1910,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:41,132 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-06-06 00:09:41,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:41,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636377120] [2021-06-06 00:09:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:41,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:41,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636377120] [2021-06-06 00:09:41,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636377120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:41,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739479421] [2021-06-06 00:09:41,616 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 [2021-06-06 00:09:41,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:09:41,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:41,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:42,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,113 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 [2021-06-06 00:09:42,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,121 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 [2021-06-06 00:09:42,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,130 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-06 00:09:42,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,139 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 16 [2021-06-06 00:09:42,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:42,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,157 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 37 treesize of output 19 [2021-06-06 00:09:42,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,182 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 [2021-06-06 00:09:42,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:42,193 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,201 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 [2021-06-06 00:09:42,202 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,210 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 [2021-06-06 00:09:42,211 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,219 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 [2021-06-06 00:09:42,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,228 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 [2021-06-06 00:09:42,229 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:42,238 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,245 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 [2021-06-06 00:09:42,246 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,254 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 [2021-06-06 00:09:42,255 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:42,262 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,318 INFO L628 ElimStorePlain]: treesize reduction 223, result has 12.9 percent of original size [2021-06-06 00:09:42,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:42,319 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-06-06 00:09:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739479421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:42,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:42,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:09:42,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190179863] [2021-06-06 00:09:42,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:42,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:42,350 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 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) [2021-06-06 00:09:42,910 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-06-06 00:09:44,123 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-06 00:09:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:44,188 INFO L93 Difference]: Finished difference Result 2280 states and 7549 transitions. [2021-06-06 00:09:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:09:44,189 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 [2021-06-06 00:09:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:44,192 INFO L225 Difference]: With dead ends: 2280 [2021-06-06 00:09:44,192 INFO L226 Difference]: Without dead ends: 2258 [2021-06-06 00:09:44,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2049.3ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:09:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-06-06 00:09:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1818. [2021-06-06 00:09:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-06-06 00:09:44,214 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-06-06 00:09:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:44,214 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-06-06 00:09:44,214 INFO L483 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) [2021-06-06 00:09:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-06-06 00:09:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:44,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:44,216 INFO L554 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] [2021-06-06 00:09:44,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1966 [2021-06-06 00:09:44,416 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-06-06 00:09:44,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:44,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059766015] [2021-06-06 00:09:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:44,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:44,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059766015] [2021-06-06 00:09:44,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059766015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:44,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857599362] [2021-06-06 00:09:44,928 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 [2021-06-06 00:09:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:44,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:45,294 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_161], 5=[v_prenex_163, v_prenex_159]} [2021-06-06 00:09:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:45,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:45,302 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:09:45,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:45,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-06-06 00:09:45,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,393 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-06-06 00:09:45,394 INFO L518 ElimStorePlain]: Eliminatee v_prenex_161 vanished before elimination [2021-06-06 00:09:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:45,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:09:45,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:45,431 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 [2021-06-06 00:09:45,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:45,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:09:45,459 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:43 [2021-06-06 00:09:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:45,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857599362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:45,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:45,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:09:45,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25019609] [2021-06-06 00:09:45,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:45,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:45,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:45,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:45,512 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 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) [2021-06-06 00:09:46,108 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-06-06 00:09:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:47,497 INFO L93 Difference]: Finished difference Result 2473 states and 8184 transitions. [2021-06-06 00:09:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:09:47,497 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 [2021-06-06 00:09:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:47,500 INFO L225 Difference]: With dead ends: 2473 [2021-06-06 00:09:47,501 INFO L226 Difference]: Without dead ends: 2458 [2021-06-06 00:09:47,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2240.6ms TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:09:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-06-06 00:09:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1818. [2021-06-06 00:09:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-06-06 00:09:47,523 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-06-06 00:09:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:47,524 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-06-06 00:09:47,524 INFO L483 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) [2021-06-06 00:09:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-06-06 00:09:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:47,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:47,526 INFO L554 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] [2021-06-06 00:09:47,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-06-06 00:09:47,726 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:47,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:47,727 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-06-06 00:09:47,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:47,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813328926] [2021-06-06 00:09:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:48,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:48,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813328926] [2021-06-06 00:09:48,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813328926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:48,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078577401] [2021-06-06 00:09:48,190 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 [2021-06-06 00:09:48,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:48,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:48,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:09:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:48,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:48,850 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:48,851 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-06 00:09:48,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:48,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:48,912 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-06-06 00:09:48,913 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 40 [2021-06-06 00:09:48,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:48,974 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-06 00:09:48,974 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 [2021-06-06 00:09:48,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,026 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:49,027 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-06-06 00:09:49,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,080 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:49,080 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 [2021-06-06 00:09:49,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,127 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:49,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:49,135 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,186 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:49,186 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-06 00:09:49,196 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,245 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-06 00:09:49,245 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 [2021-06-06 00:09:49,249 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:49,286 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 [2021-06-06 00:09:49,305 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,357 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:49,358 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-06 00:09:49,364 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:49,403 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 63 [2021-06-06 00:09:49,416 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,438 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:49,438 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 [2021-06-06 00:09:49,439 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,483 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:49,483 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-06-06 00:09:49,488 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,509 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:49,509 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 [2021-06-06 00:09:49,510 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,548 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-06-06 00:09:49,548 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 [2021-06-06 00:09:49,549 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,562 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:49,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:49,563 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:50,036 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-06-06 00:09:50,037 INFO L628 ElimStorePlain]: treesize reduction 411, result has 45.1 percent of original size [2021-06-06 00:09:50,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:50,044 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:389 [2021-06-06 00:09:50,348 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-06-06 00:09:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:50,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078577401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:50,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:50,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:09:50,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475175459] [2021-06-06 00:09:50,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:09:50,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:09:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:09:50,455 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:51,146 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-06-06 00:09:51,708 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-06 00:09:52,239 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-06-06 00:09:52,472 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-06 00:09:52,780 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-06 00:09:53,239 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-06 00:09:53,384 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-06 00:09:53,982 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-06 00:09:54,313 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-06 00:09:54,537 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-06 00:09:54,792 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-06-06 00:09:54,987 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-06 00:09:55,126 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-06 00:09:55,455 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-06 00:09:55,735 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-06 00:09:55,990 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-06 00:09:56,515 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-06 00:09:56,648 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-06 00:09:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:57,248 INFO L93 Difference]: Finished difference Result 3328 states and 10546 transitions. [2021-06-06 00:09:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:09:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:09:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:57,253 INFO L225 Difference]: With dead ends: 3328 [2021-06-06 00:09:57,253 INFO L226 Difference]: Without dead ends: 3272 [2021-06-06 00:09:57,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 6722.6ms TimeCoverageRelationStatistics Valid=856, Invalid=4400, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:09:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-06-06 00:09:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 1831. [2021-06-06 00:09:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.40327868852459) internal successors, (6228), 1830 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6228 transitions. [2021-06-06 00:09:57,283 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6228 transitions. Word has length 26 [2021-06-06 00:09:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:57,283 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6228 transitions. [2021-06-06 00:09:57,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6228 transitions. [2021-06-06 00:09:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:57,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:57,285 INFO L554 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] [2021-06-06 00:09:57,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2070,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:57,487 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-06-06 00:09:57,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:57,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901134964] [2021-06-06 00:09:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:57,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:57,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901134964] [2021-06-06 00:09:57,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901134964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:57,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927762782] [2021-06-06 00:09:57,977 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 [2021-06-06 00:09:58,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:09:58,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:09:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:58,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,600 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:58,600 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-06 00:09:58,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,671 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:58,672 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 [2021-06-06 00:09:58,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,733 INFO L354 Elim1Store]: treesize reduction 4, result has 91.1 percent of original size [2021-06-06 00:09:58,733 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 59 [2021-06-06 00:09:58,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,794 INFO L354 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2021-06-06 00:09:58,794 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 32 [2021-06-06 00:09:58,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,816 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:58,817 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 [2021-06-06 00:09:58,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,862 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:58,862 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 [2021-06-06 00:09:58,869 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:58,909 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 [2021-06-06 00:09:58,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,986 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:58,987 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 [2021-06-06 00:09:58,996 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,040 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-06 00:09:59,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 42 [2021-06-06 00:09:59,043 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,088 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:59,088 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 [2021-06-06 00:09:59,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,113 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:59,114 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 1 [2021-06-06 00:09:59,114 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,149 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-06 00:09:59,150 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 29 [2021-06-06 00:09:59,151 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,171 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:59,171 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 1 [2021-06-06 00:09:59,172 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,191 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:59,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:09:59,192 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,237 INFO L354 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2021-06-06 00:09:59,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 48 [2021-06-06 00:09:59,240 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:59,252 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:59,252 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 [2021-06-06 00:09:59,253 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:59,768 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-06 00:09:59,768 INFO L628 ElimStorePlain]: treesize reduction 166, result has 70.4 percent of original size [2021-06-06 00:09:59,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-06 00:09:59,775 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:461 [2021-06-06 00:10:00,094 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-06 00:10:00,400 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-06 00:10:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927762782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:00,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:00,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-06 00:10:00,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267214794] [2021-06-06 00:10:00,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:10:00,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:00,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:10:00,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:10:00,540 INFO L87 Difference]: Start difference. First operand 1831 states and 6228 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) [2021-06-06 00:10:01,354 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-06-06 00:10:01,571 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-06 00:10:01,712 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-06-06 00:10:02,620 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-06 00:10:03,043 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-06 00:10:03,176 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-06 00:10:03,346 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-06 00:10:03,486 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-06 00:10:03,692 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-06 00:10:04,142 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-06 00:10:04,668 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-06 00:10:04,988 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-06 00:10:05,313 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-06 00:10:05,677 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2021-06-06 00:10:06,223 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-06-06 00:10:06,411 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 39 [2021-06-06 00:10:06,545 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-06 00:10:07,206 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-06-06 00:10:07,632 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-06 00:10:08,007 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-06 00:10:08,496 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-06 00:10:08,802 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-06-06 00:10:09,335 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-06-06 00:10:09,473 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 32 [2021-06-06 00:10:09,643 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 37 [2021-06-06 00:10:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:09,775 INFO L93 Difference]: Finished difference Result 3152 states and 10146 transitions. [2021-06-06 00:10:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:10:09,776 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 [2021-06-06 00:10:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:09,781 INFO L225 Difference]: With dead ends: 3152 [2021-06-06 00:10:09,782 INFO L226 Difference]: Without dead ends: 3089 [2021-06-06 00:10:09,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 9562.0ms TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:10:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-06 00:10:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1811. [2021-06-06 00:10:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.4027624309392266) internal successors, (6159), 1810 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6159 transitions. [2021-06-06 00:10:09,811 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6159 transitions. Word has length 26 [2021-06-06 00:10:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:09,811 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6159 transitions. [2021-06-06 00:10:09,811 INFO L483 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) [2021-06-06 00:10:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6159 transitions. [2021-06-06 00:10:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:09,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:09,814 INFO L554 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] [2021-06-06 00:10:10,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2244 [2021-06-06 00:10:10,022 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:10,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:10,022 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-06-06 00:10:10,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:10,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718003247] [2021-06-06 00:10:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:10,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:10,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718003247] [2021-06-06 00:10:10,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718003247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:10,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514379778] [2021-06-06 00:10:10,466 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 [2021-06-06 00:10:10,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:10,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:10,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:10,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:11,238 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-06 00:10:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,465 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 21 treesize of output 37 [2021-06-06 00:10:11,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,507 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:10:11,507 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 26 treesize of output 32 [2021-06-06 00:10:11,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,817 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-06 00:10:11,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,858 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-06 00:10:11,858 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 31 treesize of output 39 [2021-06-06 00:10:11,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:11,894 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-06 00:10:11,895 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 26 treesize of output 36 [2021-06-06 00:10:11,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:12,178 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-06 00:10:12,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,209 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-06 00:10:12,210 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 24 [2021-06-06 00:10:12,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,237 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-06 00:10:12,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 28 [2021-06-06 00:10:12,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:12,710 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2021-06-06 00:10:12,710 INFO L628 ElimStorePlain]: treesize reduction 38, result has 92.7 percent of original size [2021-06-06 00:10:12,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:12,741 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 43 [2021-06-06 00:10:12,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:12,780 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-06 00:10:12,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 39 [2021-06-06 00:10:12,793 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:13,231 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2021-06-06 00:10:13,232 INFO L628 ElimStorePlain]: treesize reduction 47, result has 90.4 percent of original size [2021-06-06 00:10:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:13,273 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 43 [2021-06-06 00:10:13,284 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,312 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:10:13,313 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 26 [2021-06-06 00:10:13,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:13,518 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-06 00:10:13,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,549 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-06 00:10:13,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 31 [2021-06-06 00:10:13,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,566 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-06-06 00:10:13,566 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 1 [2021-06-06 00:10:13,573 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:13,727 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:10:13,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:13,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:10:13,740 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:621, output treesize:257 [2021-06-06 00:10:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:13,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514379778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:13,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:13,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:10:13,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712351706] [2021-06-06 00:10:13,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:10:13,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:10:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:10:13,906 INFO L87 Difference]: Start difference. First operand 1811 states and 6159 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) [2021-06-06 00:10:14,231 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-06 00:10:15,119 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-06 00:10:15,989 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-06 00:10:16,110 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-06 00:10:16,515 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-06-06 00:10:17,042 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2021-06-06 00:10:17,177 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-06 00:10:17,439 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-06-06 00:10:17,604 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-06 00:10:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:18,033 INFO L93 Difference]: Finished difference Result 3034 states and 9904 transitions. [2021-06-06 00:10:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:10:18,033 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 [2021-06-06 00:10:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:18,037 INFO L225 Difference]: With dead ends: 3034 [2021-06-06 00:10:18,037 INFO L226 Difference]: Without dead ends: 2983 [2021-06-06 00:10:18,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 4470.2ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:10:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-06-06 00:10:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1871. [2021-06-06 00:10:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.411229946524064) internal successors, (6379), 1870 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6379 transitions. [2021-06-06 00:10:18,065 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6379 transitions. Word has length 26 [2021-06-06 00:10:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:18,065 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6379 transitions. [2021-06-06 00:10:18,065 INFO L483 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) [2021-06-06 00:10:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6379 transitions. [2021-06-06 00:10:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:18,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:18,067 INFO L554 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] [2021-06-06 00:10:18,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2410 [2021-06-06 00:10:18,269 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash 227092556, now seen corresponding path program 53 times [2021-06-06 00:10:18,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:18,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042393706] [2021-06-06 00:10:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:18,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:18,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042393706] [2021-06-06 00:10:18,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042393706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:18,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853550359] [2021-06-06 00:10:18,827 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 [2021-06-06 00:10:18,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:10:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:18,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:19,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,374 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 [2021-06-06 00:10:19,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,383 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 36 treesize of output 16 [2021-06-06 00:10:19,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,393 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 [2021-06-06 00:10:19,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,405 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 [2021-06-06 00:10:19,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,417 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 [2021-06-06 00:10:19,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,429 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 [2021-06-06 00:10:19,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,440 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 [2021-06-06 00:10:19,441 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,451 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 45 treesize of output 16 [2021-06-06 00:10:19,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,462 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 [2021-06-06 00:10:19,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:10:19,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,485 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 [2021-06-06 00:10:19,486 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,496 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 [2021-06-06 00:10:19,497 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:10:19,507 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,516 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 [2021-06-06 00:10:19,517 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,526 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 [2021-06-06 00:10:19,527 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:19,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:19,555 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 [2021-06-06 00:10:19,556 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:19,604 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-06 00:10:19,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:10:19,605 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-06-06 00:10:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:19,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853550359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:19,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:19,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:10:19,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764619912] [2021-06-06 00:10:19,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:19,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:19,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:19,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:19,644 INFO L87 Difference]: Start difference. First operand 1871 states and 6379 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) [2021-06-06 00:10:20,759 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-06 00:10:20,897 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-06 00:10:21,029 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-06 00:10:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:21,147 INFO L93 Difference]: Finished difference Result 2487 states and 8126 transitions. [2021-06-06 00:10:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:10:21,147 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 [2021-06-06 00:10:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:21,150 INFO L225 Difference]: With dead ends: 2487 [2021-06-06 00:10:21,150 INFO L226 Difference]: Without dead ends: 2449 [2021-06-06 00:10:21,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1865.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:10:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-06 00:10:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1871. [2021-06-06 00:10:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.409090909090909) internal successors, (6375), 1870 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6375 transitions. [2021-06-06 00:10:21,174 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6375 transitions. Word has length 26 [2021-06-06 00:10:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:21,174 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6375 transitions. [2021-06-06 00:10:21,174 INFO L483 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) [2021-06-06 00:10:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6375 transitions. [2021-06-06 00:10:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:21,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:21,177 INFO L554 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] [2021-06-06 00:10:21,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:21,377 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:21,378 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 54 times [2021-06-06 00:10:21,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:21,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456612191] [2021-06-06 00:10:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:21,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:21,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456612191] [2021-06-06 00:10:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456612191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:21,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109481041] [2021-06-06 00:10:21,753 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 [2021-06-06 00:10:21,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:10:21,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:21,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:21,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:22,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,032 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:10:22,032 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 [2021-06-06 00:10:22,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,065 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-06 00:10:22,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-06-06 00:10:22,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,092 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:10:22,092 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 28 [2021-06-06 00:10:22,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,112 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:22,113 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 [2021-06-06 00:10:22,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,137 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:10:22,137 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 28 [2021-06-06 00:10:22,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,163 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:10:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 28 [2021-06-06 00:10:22,164 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,179 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:22,179 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 [2021-06-06 00:10:22,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,195 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:22,195 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 [2021-06-06 00:10:22,196 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,220 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-06 00:10:22,220 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 26 [2021-06-06 00:10:22,221 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,237 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:22,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:10:22,238 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,253 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:22,253 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 [2021-06-06 00:10:22,254 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,277 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-06 00:10:22,277 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 24 [2021-06-06 00:10:22,279 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,302 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-06 00:10:22,303 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 24 [2021-06-06 00:10:22,304 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:22,326 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 39 [2021-06-06 00:10:22,333 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,356 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:10:22,356 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 [2021-06-06 00:10:22,358 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:22,367 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:22,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:10:22,367 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:22,491 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-06-06 00:10:22,491 INFO L628 ElimStorePlain]: treesize reduction 128, result has 42.1 percent of original size [2021-06-06 00:10:22,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:10:22,492 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:93 [2021-06-06 00:10:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:22,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109481041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:22,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:22,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:10:22,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248545443] [2021-06-06 00:10:22,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:22,605 INFO L87 Difference]: Start difference. First operand 1871 states and 6375 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) [2021-06-06 00:10:23,077 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-06 00:10:23,511 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-06-06 00:10:23,930 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-06 00:10:24,057 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-06 00:10:24,371 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-06 00:10:25,059 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-06 00:10:25,383 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-06 00:10:25,571 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-06 00:10:25,877 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-06 00:10:26,057 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-06-06 00:10:26,276 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-06-06 00:10:26,531 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-06-06 00:10:26,804 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-06 00:10:27,029 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-06-06 00:10:27,321 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-06-06 00:10:27,648 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2021-06-06 00:10:27,954 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-06 00:10:28,297 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-06 00:10:28,503 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-06 00:10:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:28,707 INFO L93 Difference]: Finished difference Result 3107 states and 9967 transitions. [2021-06-06 00:10:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:10:28,707 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 [2021-06-06 00:10:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:28,711 INFO L225 Difference]: With dead ends: 3107 [2021-06-06 00:10:28,711 INFO L226 Difference]: Without dead ends: 3069 [2021-06-06 00:10:28,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 5925.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2913, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:10:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-06 00:10:28,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1881. [2021-06-06 00:10:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 3.4159574468085108) internal successors, (6422), 1880 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6422 transitions. [2021-06-06 00:10:28,762 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6422 transitions. Word has length 26 [2021-06-06 00:10:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:28,762 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 6422 transitions. [2021-06-06 00:10:28,762 INFO L483 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) [2021-06-06 00:10:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6422 transitions. [2021-06-06 00:10:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:28,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:28,765 INFO L554 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] [2021-06-06 00:10:28,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2591,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:28,965 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-06-06 00:10:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:28,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814445006] [2021-06-06 00:10:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:29,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814445006] [2021-06-06 00:10:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814445006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:29,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143646578] [2021-06-06 00:10:29,313 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:29,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:10:29,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:10:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:29,720 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:10:29,902 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-06 00:10:29,952 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_191, v_prenex_189], 2=[v_prenex_190, A]} [2021-06-06 00:10:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:29,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:10:29,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:29,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:29,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:10:29,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:30,120 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-06 00:10:30,120 INFO L628 ElimStorePlain]: treesize reduction 118, result has 55.1 percent of original size [2021-06-06 00:10:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:10:30,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:30,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:30,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:30,180 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 [2021-06-06 00:10:30,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:30,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:30,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:30,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:30,233 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 [2021-06-06 00:10:30,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:30,237 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 [2021-06-06 00:10:30,238 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:30,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:30,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:10:30,280 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:51 [2021-06-06 00:10:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:30,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143646578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:30,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:30,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:10:30,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826391599] [2021-06-06 00:10:30,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:30,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:30,341 INFO L87 Difference]: Start difference. First operand 1881 states and 6422 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) [2021-06-06 00:10:31,098 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-06 00:10:31,387 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-06 00:10:31,627 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-06 00:10:31,866 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-06 00:10:32,104 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-06 00:10:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:32,235 INFO L93 Difference]: Finished difference Result 2308 states and 7739 transitions. [2021-06-06 00:10:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:10:32,236 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 [2021-06-06 00:10:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:32,239 INFO L225 Difference]: With dead ends: 2308 [2021-06-06 00:10:32,239 INFO L226 Difference]: Without dead ends: 2293 [2021-06-06 00:10:32,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2209.3ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:10:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-06-06 00:10:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1873. [2021-06-06 00:10:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.419337606837607) internal successors, (6401), 1872 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6401 transitions. [2021-06-06 00:10:32,261 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6401 transitions. Word has length 26 [2021-06-06 00:10:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:32,261 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 6401 transitions. [2021-06-06 00:10:32,261 INFO L483 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) [2021-06-06 00:10:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6401 transitions. [2021-06-06 00:10:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:32,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:32,263 INFO L554 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] [2021-06-06 00:10:32,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2616 [2021-06-06 00:10:32,464 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:32,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-06-06 00:10:32,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:32,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343630542] [2021-06-06 00:10:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:32,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:32,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343630542] [2021-06-06 00:10:32,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343630542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:32,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568821295] [2021-06-06 00:10:32,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:32,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,169 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 21 treesize of output 13 [2021-06-06 00:10:33,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,175 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 [2021-06-06 00:10:33,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,181 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 [2021-06-06 00:10:33,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:33,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,193 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 [2021-06-06 00:10:33,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:33,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,206 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 [2021-06-06 00:10:33,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,212 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:33,213 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,218 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 [2021-06-06 00:10:33,218 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,223 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 [2021-06-06 00:10:33,224 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,229 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:33,229 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,234 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 [2021-06-06 00:10:33,235 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,240 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 [2021-06-06 00:10:33,241 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,245 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 [2021-06-06 00:10:33,246 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:33,249 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 [2021-06-06 00:10:33,250 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,329 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:10:33,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:10:33,331 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:10:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:33,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568821295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:33,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:33,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:10:33,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490342823] [2021-06-06 00:10:33,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:10:33,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:33,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:10:33,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:10:33,391 INFO L87 Difference]: Start difference. First operand 1873 states and 6401 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) [2021-06-06 00:10:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:33,803 INFO L93 Difference]: Finished difference Result 2211 states and 7445 transitions. [2021-06-06 00:10:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:10:33,804 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 [2021-06-06 00:10:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:33,807 INFO L225 Difference]: With dead ends: 2211 [2021-06-06 00:10:33,807 INFO L226 Difference]: Without dead ends: 2196 [2021-06-06 00:10:33,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-06-06 00:10:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1867. [2021-06-06 00:10:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4190782422293675) internal successors, (6380), 1866 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6380 transitions. [2021-06-06 00:10:33,831 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6380 transitions. Word has length 26 [2021-06-06 00:10:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:33,831 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6380 transitions. [2021-06-06 00:10:33,831 INFO L483 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) [2021-06-06 00:10:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6380 transitions. [2021-06-06 00:10:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:33,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:33,834 INFO L554 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] [2021-06-06 00:10:34,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:34,056 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-06-06 00:10:34,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:34,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522546142] [2021-06-06 00:10:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:34,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:34,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522546142] [2021-06-06 00:10:34,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522546142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:34,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735479902] [2021-06-06 00:10:34,465 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:34,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:10:34,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:34,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:34,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:34,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,766 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:34,767 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 21 treesize of output 17 [2021-06-06 00:10:34,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,777 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:34,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,786 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,787 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 31 treesize of output 19 [2021-06-06 00:10:34,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,799 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:34,799 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 [2021-06-06 00:10:34,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,809 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:34,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,822 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 [2021-06-06 00:10:34,826 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,835 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 [2021-06-06 00:10:34,836 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,848 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 [2021-06-06 00:10:34,849 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,859 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 [2021-06-06 00:10:34,859 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,871 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 33 treesize of output 27 [2021-06-06 00:10:34,874 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,896 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,896 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 [2021-06-06 00:10:34,897 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,906 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,906 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 [2021-06-06 00:10:34,907 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,919 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 [2021-06-06 00:10:34,920 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,932 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:34,932 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 [2021-06-06 00:10:34,934 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,940 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:34,940 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 [2021-06-06 00:10:34,941 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:35,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:35,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:35,033 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-06-06 00:10:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735479902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:35,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:35,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:10:35,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670828482] [2021-06-06 00:10:35,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:10:35,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:10:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:10:35,222 INFO L87 Difference]: Start difference. First operand 1867 states and 6380 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) [2021-06-06 00:10:35,788 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-06-06 00:10:36,371 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2021-06-06 00:10:36,753 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-06 00:10:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:36,903 INFO L93 Difference]: Finished difference Result 2784 states and 9269 transitions. [2021-06-06 00:10:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:10:36,904 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 [2021-06-06 00:10:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:36,908 INFO L225 Difference]: With dead ends: 2784 [2021-06-06 00:10:36,908 INFO L226 Difference]: Without dead ends: 2769 [2021-06-06 00:10:36,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1985.7ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:10:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-06-06 00:10:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1864. [2021-06-06 00:10:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.416532474503489) internal successors, (6365), 1863 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6365 transitions. [2021-06-06 00:10:36,937 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6365 transitions. Word has length 26 [2021-06-06 00:10:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:36,937 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 6365 transitions. [2021-06-06 00:10:36,937 INFO L483 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) [2021-06-06 00:10:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6365 transitions. [2021-06-06 00:10:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:36,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:36,940 INFO L554 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] [2021-06-06 00:10:37,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2657 [2021-06-06 00:10:37,141 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 33 times [2021-06-06 00:10:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:37,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246535176] [2021-06-06 00:10:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:37,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:37,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246535176] [2021-06-06 00:10:37,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246535176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:37,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982189230] [2021-06-06 00:10:37,605 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:37,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:10:37,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:37,926 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:10:38,169 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-06 00:10:38,268 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_201], 2=[v_prenex_199, v_prenex_200]} [2021-06-06 00:10:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:10:38,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:38,409 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-06 00:10:38,409 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.9 percent of original size [2021-06-06 00:10:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:38,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:10:38,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:38,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:38,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:38,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:38,470 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 [2021-06-06 00:10:38,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:38,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:38,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:38,475 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 21 treesize of output 13 [2021-06-06 00:10:38,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:38,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:38,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:38,523 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:38,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:38,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:38,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:10:38,567 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:217, output treesize:51 [2021-06-06 00:10:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:38,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982189230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:38,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:38,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:10:38,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153014618] [2021-06-06 00:10:38,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:10:38,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:38,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:10:38,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:10:38,626 INFO L87 Difference]: Start difference. First operand 1864 states and 6365 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) [2021-06-06 00:10:39,859 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-06 00:10:40,274 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-06 00:10:40,622 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-06 00:10:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:40,777 INFO L93 Difference]: Finished difference Result 2480 states and 8310 transitions. [2021-06-06 00:10:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:10:40,778 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 [2021-06-06 00:10:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:40,781 INFO L225 Difference]: With dead ends: 2480 [2021-06-06 00:10:40,781 INFO L226 Difference]: Without dead ends: 2465 [2021-06-06 00:10:40,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2592.8ms TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:10:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-06 00:10:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1863. [2021-06-06 00:10:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4162191192266382) internal successors, (6361), 1862 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6361 transitions. [2021-06-06 00:10:40,805 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6361 transitions. Word has length 26 [2021-06-06 00:10:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:40,805 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6361 transitions. [2021-06-06 00:10:40,805 INFO L483 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) [2021-06-06 00:10:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6361 transitions. [2021-06-06 00:10:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:40,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:40,807 INFO L554 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] [2021-06-06 00:10:41,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2694 [2021-06-06 00:10:41,008 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:41,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1946185846, now seen corresponding path program 34 times [2021-06-06 00:10:41,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:41,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410757677] [2021-06-06 00:10:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:41,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:41,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410757677] [2021-06-06 00:10:41,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410757677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:41,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315592575] [2021-06-06 00:10:41,324 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:41,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:41,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:41,630 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:10:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:41,757 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:41,757 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 [2021-06-06 00:10:41,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,877 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:10:41,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:41,890 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:41,890 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 [2021-06-06 00:10:41,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,001 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-06 00:10:42,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,013 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 [2021-06-06 00:10:42,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,124 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-06 00:10:42,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,136 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 [2021-06-06 00:10:42,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,245 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-06 00:10:42,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,256 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 [2021-06-06 00:10:42,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,371 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 [2021-06-06 00:10:42,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,484 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 [2021-06-06 00:10:42,485 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,592 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:42,592 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 [2021-06-06 00:10:42,594 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:42,691 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-06 00:10:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:42,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315592575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:42,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:42,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:10:42,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16777099] [2021-06-06 00:10:42,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:10:42,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:42,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:10:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:10:42,889 INFO L87 Difference]: Start difference. First operand 1863 states and 6361 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) [2021-06-06 00:10:43,490 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2021-06-06 00:10:43,958 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-06 00:10:44,453 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-06 00:10:44,841 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-06-06 00:10:45,046 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-06 00:10:45,352 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-06 00:10:45,501 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-06 00:10:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:45,587 INFO L93 Difference]: Finished difference Result 2968 states and 9767 transitions. [2021-06-06 00:10:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:10:45,587 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 [2021-06-06 00:10:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:45,591 INFO L225 Difference]: With dead ends: 2968 [2021-06-06 00:10:45,591 INFO L226 Difference]: Without dead ends: 2938 [2021-06-06 00:10:45,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2903.8ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:10:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-06-06 00:10:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1863. [2021-06-06 00:10:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4183673469387754) internal successors, (6365), 1862 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6365 transitions. [2021-06-06 00:10:45,618 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6365 transitions. Word has length 26 [2021-06-06 00:10:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:45,618 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6365 transitions. [2021-06-06 00:10:45,618 INFO L483 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) [2021-06-06 00:10:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6365 transitions. [2021-06-06 00:10:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:45,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:45,620 INFO L554 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] [2021-06-06 00:10:45,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2703,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:45,821 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 35 times [2021-06-06 00:10:45,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:45,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725498485] [2021-06-06 00:10:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:46,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:46,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725498485] [2021-06-06 00:10:46,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725498485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:46,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203711612] [2021-06-06 00:10:46,224 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:46,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:10:46,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:10:46,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,653 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 21 treesize of output 13 [2021-06-06 00:10:46,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:46,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,666 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 [2021-06-06 00:10:46,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,673 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 [2021-06-06 00:10:46,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,679 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 [2021-06-06 00:10:46,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,686 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 [2021-06-06 00:10:46,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,692 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 [2021-06-06 00:10:46,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,698 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:46,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:10:46,705 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,711 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 33 treesize of output 19 [2021-06-06 00:10:46,712 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,717 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 [2021-06-06 00:10:46,719 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,724 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 [2021-06-06 00:10:46,725 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,730 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 [2021-06-06 00:10:46,731 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,736 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 [2021-06-06 00:10:46,737 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:46,740 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 [2021-06-06 00:10:46,741 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,818 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:10:46,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:10:46,819 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:10:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:46,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203711612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:46,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:46,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:10:46,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132626309] [2021-06-06 00:10:46,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:10:46,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:46,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:10:46,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:10:46,873 INFO L87 Difference]: Start difference. First operand 1863 states and 6365 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) [2021-06-06 00:10:47,403 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-06 00:10:47,717 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-06 00:10:47,872 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-06 00:10:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:48,054 INFO L93 Difference]: Finished difference Result 2374 states and 7932 transitions. [2021-06-06 00:10:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:10:48,055 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 [2021-06-06 00:10:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:48,058 INFO L225 Difference]: With dead ends: 2374 [2021-06-06 00:10:48,058 INFO L226 Difference]: Without dead ends: 2353 [2021-06-06 00:10:48,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1534.8ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:10:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-06 00:10:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1878. [2021-06-06 00:10:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.4214171550346295) internal successors, (6422), 1877 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 6422 transitions. [2021-06-06 00:10:48,081 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 6422 transitions. Word has length 26 [2021-06-06 00:10:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:48,082 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 6422 transitions. [2021-06-06 00:10:48,082 INFO L483 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) [2021-06-06 00:10:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 6422 transitions. [2021-06-06 00:10:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:48,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:48,084 INFO L554 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] [2021-06-06 00:10:48,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:48,284 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 36 times [2021-06-06 00:10:48,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:48,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107639209] [2021-06-06 00:10:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:48,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:48,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107639209] [2021-06-06 00:10:48,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107639209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:48,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338674283] [2021-06-06 00:10:48,527 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:48,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:10:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:10:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:48,910 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:48,910 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 [2021-06-06 00:10:48,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:48,924 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:48,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:10:48,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:48,944 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:48,944 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 [2021-06-06 00:10:48,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:48,965 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:48,965 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 [2021-06-06 00:10:48,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:48,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:48,982 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 [2021-06-06 00:10:48,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:48,994 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:48,994 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 36 treesize of output 22 [2021-06-06 00:10:48,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,004 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:49,004 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 19 [2021-06-06 00:10:49,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,024 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:49,024 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:10:49,027 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,036 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:49,036 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 19 [2021-06-06 00:10:49,037 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,046 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:49,046 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 31 treesize of output 19 [2021-06-06 00:10:49,047 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,055 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:49,055 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 16 [2021-06-06 00:10:49,056 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,065 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:49,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-06-06 00:10:49,065 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,074 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:49,074 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 16 [2021-06-06 00:10:49,075 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:49,089 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 [2021-06-06 00:10:49,095 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:49,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:49,111 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,125 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:49,125 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 [2021-06-06 00:10:49,126 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:49,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:49,236 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:255 [2021-06-06 00:10:49,408 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-06 00:10:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:49,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338674283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:49,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:49,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:10:49,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643797441] [2021-06-06 00:10:49,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:49,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:49,507 INFO L87 Difference]: Start difference. First operand 1878 states and 6422 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) [2021-06-06 00:10:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:51,449 INFO L93 Difference]: Finished difference Result 2454 states and 8038 transitions. [2021-06-06 00:10:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:10:51,449 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 [2021-06-06 00:10:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:51,452 INFO L225 Difference]: With dead ends: 2454 [2021-06-06 00:10:51,452 INFO L226 Difference]: Without dead ends: 2416 [2021-06-06 00:10:51,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1951.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:10:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-06 00:10:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1866. [2021-06-06 00:10:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.420911528150134) internal successors, (6380), 1865 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6380 transitions. [2021-06-06 00:10:51,483 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6380 transitions. Word has length 26 [2021-06-06 00:10:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:51,484 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6380 transitions. [2021-06-06 00:10:51,484 INFO L483 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) [2021-06-06 00:10:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6380 transitions. [2021-06-06 00:10:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:51,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:51,487 INFO L554 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] [2021-06-06 00:10:51,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2746,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:51,701 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 37 times [2021-06-06 00:10:51,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:51,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742073893] [2021-06-06 00:10:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:52,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:52,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742073893] [2021-06-06 00:10:52,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742073893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:52,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49360326] [2021-06-06 00:10:52,040 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:52,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:52,339 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 [2021-06-06 00:10:52,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,348 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,348 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 28 treesize of output 16 [2021-06-06 00:10:52,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:52,360 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 [2021-06-06 00:10:52,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:52,375 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 [2021-06-06 00:10:52,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,389 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:52,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,402 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:52,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:52,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,413 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:52,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,425 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,425 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 [2021-06-06 00:10:52,425 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,437 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:52,437 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 [2021-06-06 00:10:52,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,447 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,447 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 [2021-06-06 00:10:52,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,457 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,457 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 36 treesize of output 22 [2021-06-06 00:10:52,458 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:52,469 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 [2021-06-06 00:10:52,472 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,481 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,481 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 33 treesize of output 19 [2021-06-06 00:10:52,482 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:52,492 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 [2021-06-06 00:10:52,494 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,502 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,502 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 [2021-06-06 00:10:52,503 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:52,508 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:52,508 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 [2021-06-06 00:10:52,509 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:52,611 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-06 00:10:52,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:52,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:52,617 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-06-06 00:10:52,781 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-06 00:10:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:52,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49360326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:52,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:52,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:10:52,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255921228] [2021-06-06 00:10:52,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:10:52,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:52,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:10:52,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:10:52,891 INFO L87 Difference]: Start difference. First operand 1866 states and 6380 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) [2021-06-06 00:10:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:53,381 INFO L93 Difference]: Finished difference Result 2282 states and 7604 transitions. [2021-06-06 00:10:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:10:53,381 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 [2021-06-06 00:10:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:53,384 INFO L225 Difference]: With dead ends: 2282 [2021-06-06 00:10:53,384 INFO L226 Difference]: Without dead ends: 2257 [2021-06-06 00:10:53,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:10:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-06 00:10:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1857. [2021-06-06 00:10:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.4132543103448274) internal successors, (6335), 1856 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6335 transitions. [2021-06-06 00:10:53,405 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6335 transitions. Word has length 26 [2021-06-06 00:10:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:53,405 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6335 transitions. [2021-06-06 00:10:53,405 INFO L483 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) [2021-06-06 00:10:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6335 transitions. [2021-06-06 00:10:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:53,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:53,407 INFO L554 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] [2021-06-06 00:10:53,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2797 [2021-06-06 00:10:53,608 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:53,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 38 times [2021-06-06 00:10:53,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:53,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986721921] [2021-06-06 00:10:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:53,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:53,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986721921] [2021-06-06 00:10:53,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986721921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:53,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750224378] [2021-06-06 00:10:53,912 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:10:53,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,246 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 [2021-06-06 00:10:54,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:10:54,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,257 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 [2021-06-06 00:10:54,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,262 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 [2021-06-06 00:10:54,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,268 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 [2021-06-06 00:10:54,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,274 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 [2021-06-06 00:10:54,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,279 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 [2021-06-06 00:10:54,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,286 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 [2021-06-06 00:10:54,287 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:54,293 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,298 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 [2021-06-06 00:10:54,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,303 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 [2021-06-06 00:10:54,304 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,309 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 [2021-06-06 00:10:54,309 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:54,315 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,320 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 [2021-06-06 00:10:54,320 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,323 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:54,324 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,401 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:10:54,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:10:54,403 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:10:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:54,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750224378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:54,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:54,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:10:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425879043] [2021-06-06 00:10:54,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:10:54,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:10:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:10:54,460 INFO L87 Difference]: Start difference. First operand 1857 states and 6335 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) [2021-06-06 00:10:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:54,788 INFO L93 Difference]: Finished difference Result 1943 states and 6537 transitions. [2021-06-06 00:10:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:10:54,788 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 [2021-06-06 00:10:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:54,791 INFO L225 Difference]: With dead ends: 1943 [2021-06-06 00:10:54,791 INFO L226 Difference]: Without dead ends: 1924 [2021-06-06 00:10:54,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:10:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-06-06 00:10:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1834. [2021-06-06 00:10:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.413529732678669) internal successors, (6257), 1833 states have internal predecessors, (6257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6257 transitions. [2021-06-06 00:10:54,812 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6257 transitions. Word has length 26 [2021-06-06 00:10:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:54,812 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6257 transitions. [2021-06-06 00:10:54,812 INFO L483 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) [2021-06-06 00:10:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6257 transitions. [2021-06-06 00:10:54,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:54,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:54,814 INFO L554 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] [2021-06-06 00:10:55,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2838,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:55,015 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-06-06 00:10:55,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:55,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727127575] [2021-06-06 00:10:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:55,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:55,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727127575] [2021-06-06 00:10:55,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727127575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:55,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945800741] [2021-06-06 00:10:55,247 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:55,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:10:55,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:55,686 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:55,686 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 [2021-06-06 00:10:55,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:55,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:55,710 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:55,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:55,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:55,862 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-06 00:10:55,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:55,884 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:55,884 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 [2021-06-06 00:10:55,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:55,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:55,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:55,901 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 [2021-06-06 00:10:55,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,186 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-06 00:10:56,186 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-06 00:10:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:56,212 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 [2021-06-06 00:10:56,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,235 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:56,235 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 [2021-06-06 00:10:56,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,499 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-06 00:10:56,499 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.1 percent of original size [2021-06-06 00:10:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,519 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:56,519 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 21 treesize of output 21 [2021-06-06 00:10:56,520 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:56,545 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 [2021-06-06 00:10:56,550 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,670 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-06 00:10:56,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:56,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:56,687 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-06-06 00:10:56,885 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-06 00:10:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:56,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945800741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:56,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:56,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:10:56,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079369004] [2021-06-06 00:10:56,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:56,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:56,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:56,983 INFO L87 Difference]: Start difference. First operand 1834 states and 6257 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) [2021-06-06 00:10:57,642 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-06 00:10:57,814 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-06-06 00:10:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:57,855 INFO L93 Difference]: Finished difference Result 2041 states and 6856 transitions. [2021-06-06 00:10:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:10:57,855 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 [2021-06-06 00:10:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:57,858 INFO L225 Difference]: With dead ends: 2041 [2021-06-06 00:10:57,858 INFO L226 Difference]: Without dead ends: 2016 [2021-06-06 00:10:57,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1252.5ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:10:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-06-06 00:10:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1816. [2021-06-06 00:10:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.41763085399449) internal successors, (6203), 1815 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6203 transitions. [2021-06-06 00:10:57,888 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6203 transitions. Word has length 26 [2021-06-06 00:10:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:57,888 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6203 transitions. [2021-06-06 00:10:57,888 INFO L483 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) [2021-06-06 00:10:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6203 transitions. [2021-06-06 00:10:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:57,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:57,890 INFO L554 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] [2021-06-06 00:10:58,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2866 [2021-06-06 00:10:58,091 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-06-06 00:10:58,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:58,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974513541] [2021-06-06 00:10:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:58,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:58,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974513541] [2021-06-06 00:10:58,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974513541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:58,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950047254] [2021-06-06 00:10:58,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:58,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:58,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:10:58,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:58,733 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-06 00:10:58,827 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_232], 3=[v_prenex_233, v_prenex_234]} [2021-06-06 00:10:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:58,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:58,841 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 33 treesize of output 27 [2021-06-06 00:10:58,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:58,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:58,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:10:58,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:58,995 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-06 00:10:58,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,008 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 [2021-06-06 00:10:59,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,020 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:59,020 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 [2021-06-06 00:10:59,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,164 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:10:59,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,178 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:10:59,179 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 [2021-06-06 00:10:59,180 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,190 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 30 treesize of output 26 [2021-06-06 00:10:59,194 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,308 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-06 00:10:59,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,320 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 [2021-06-06 00:10:59,324 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,334 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:10:59,334 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 [2021-06-06 00:10:59,335 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,436 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-06 00:10:59,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:59,442 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:361, output treesize:194 [2021-06-06 00:10:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:59,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950047254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:59,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:59,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:10:59,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685980967] [2021-06-06 00:10:59,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:10:59,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:59,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:10:59,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:10:59,638 INFO L87 Difference]: Start difference. First operand 1816 states and 6203 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) [2021-06-06 00:10:59,944 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-06 00:11:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:00,499 INFO L93 Difference]: Finished difference Result 2323 states and 7788 transitions. [2021-06-06 00:11:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:11:00,500 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 [2021-06-06 00:11:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:00,503 INFO L225 Difference]: With dead ends: 2323 [2021-06-06 00:11:00,503 INFO L226 Difference]: Without dead ends: 2298 [2021-06-06 00:11:00,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1166.6ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:11:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-06 00:11:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1804. [2021-06-06 00:11:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4170826400443706) internal successors, (6161), 1803 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6161 transitions. [2021-06-06 00:11:00,535 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6161 transitions. Word has length 26 [2021-06-06 00:11:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:00,535 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6161 transitions. [2021-06-06 00:11:00,535 INFO L483 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) [2021-06-06 00:11:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6161 transitions. [2021-06-06 00:11:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:00,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:00,537 INFO L554 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] [2021-06-06 00:11:00,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:00,737 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:00,738 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-06-06 00:11:00,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:00,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190763694] [2021-06-06 00:11:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:01,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:01,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190763694] [2021-06-06 00:11:01,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190763694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:01,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243958255] [2021-06-06 00:11:01,025 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:01,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:11:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:01,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:11:01,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,424 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 [2021-06-06 00:11:01,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,430 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 [2021-06-06 00:11:01,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,436 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 21 treesize of output 13 [2021-06-06 00:11:01,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,441 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 [2021-06-06 00:11:01,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,447 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 [2021-06-06 00:11:01,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,454 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 [2021-06-06 00:11:01,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,459 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 [2021-06-06 00:11:01,460 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:01,466 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,471 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 [2021-06-06 00:11:01,472 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,477 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 [2021-06-06 00:11:01,478 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,483 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 36 treesize of output 19 [2021-06-06 00:11:01,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,489 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 [2021-06-06 00:11:01,490 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,495 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 [2021-06-06 00:11:01,496 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:01,501 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:01,505 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 33 treesize of output 19 [2021-06-06 00:11:01,505 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,583 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:11:01,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:01,585 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:11:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:01,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243958255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:01,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:01,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:11:01,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401116185] [2021-06-06 00:11:01,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:11:01,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:11:01,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:11:01,638 INFO L87 Difference]: Start difference. First operand 1804 states and 6161 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) [2021-06-06 00:11:02,363 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-06 00:11:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:02,566 INFO L93 Difference]: Finished difference Result 2327 states and 7784 transitions. [2021-06-06 00:11:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:11:02,566 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 [2021-06-06 00:11:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:02,570 INFO L225 Difference]: With dead ends: 2327 [2021-06-06 00:11:02,570 INFO L226 Difference]: Without dead ends: 2312 [2021-06-06 00:11:02,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:11:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-06-06 00:11:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1849. [2021-06-06 00:11:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-06-06 00:11:02,591 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-06-06 00:11:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:02,591 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-06-06 00:11:02,591 INFO L483 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) [2021-06-06 00:11:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-06-06 00:11:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:02,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:02,594 INFO L554 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] [2021-06-06 00:11:02,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2955,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:02,794 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-06-06 00:11:02,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:02,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748114886] [2021-06-06 00:11:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:03,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748114886] [2021-06-06 00:11:03,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748114886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204863247] [2021-06-06 00:11:03,115 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:03,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:11:03,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:03,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:11:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:03,515 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,516 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 36 treesize of output 22 [2021-06-06 00:11:03,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,526 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-06-06 00:11:03,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,536 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,536 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 16 [2021-06-06 00:11:03,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,546 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:11:03,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,559 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,559 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 31 treesize of output 19 [2021-06-06 00:11:03,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:03,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:03,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,585 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-06-06 00:11:03,585 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,594 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,594 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 19 [2021-06-06 00:11:03,595 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:03,611 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 [2021-06-06 00:11:03,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,631 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:03,631 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 [2021-06-06 00:11:03,633 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:03,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:03,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,673 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:03,673 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 [2021-06-06 00:11:03,674 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,693 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:03,697 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,706 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:03,706 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 31 treesize of output 19 [2021-06-06 00:11:03,706 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,723 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:03,723 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 [2021-06-06 00:11:03,725 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,741 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:03,741 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:11:03,745 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:03,846 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-06 00:11:03,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:03,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:03,858 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:247 [2021-06-06 00:11:04,032 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-06 00:11:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:04,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204863247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:04,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:04,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:11:04,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946818158] [2021-06-06 00:11:04,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:11:04,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:04,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:11:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:11:04,143 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 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) [2021-06-06 00:11:04,853 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-06 00:11:05,034 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-06 00:11:05,164 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-06 00:11:05,316 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-06 00:11:05,721 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-06 00:11:05,909 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-06 00:11:06,156 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-06-06 00:11:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:06,190 INFO L93 Difference]: Finished difference Result 2674 states and 8821 transitions. [2021-06-06 00:11:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:11:06,191 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 [2021-06-06 00:11:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:06,194 INFO L225 Difference]: With dead ends: 2674 [2021-06-06 00:11:06,194 INFO L226 Difference]: Without dead ends: 2644 [2021-06-06 00:11:06,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2415.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:11:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-06-06 00:11:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1849. [2021-06-06 00:11:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-06-06 00:11:06,219 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-06-06 00:11:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:06,220 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-06-06 00:11:06,220 INFO L483 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) [2021-06-06 00:11:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-06-06 00:11:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:06,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:06,222 INFO L554 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] [2021-06-06 00:11:06,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2987 [2021-06-06 00:11:06,435 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:06,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-06-06 00:11:06,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:06,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424442899] [2021-06-06 00:11:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:06,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424442899] [2021-06-06 00:11:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424442899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400032905] [2021-06-06 00:11:06,755 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:11:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:07,128 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[A, v_prenex_240, v_prenex_236]} [2021-06-06 00:11:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:07,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:07,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:07,136 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 [2021-06-06 00:11:07,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:07,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:07,143 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 [2021-06-06 00:11:07,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:07,298 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-06 00:11:07,299 INFO L628 ElimStorePlain]: treesize reduction 158, result has 46.4 percent of original size [2021-06-06 00:11:07,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:07,303 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 [2021-06-06 00:11:07,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:07,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:07,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:11:07,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:07,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:07,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:11:07,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:07,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:07,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:07,443 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:335, output treesize:51 [2021-06-06 00:11:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400032905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:07,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:07,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777709945] [2021-06-06 00:11:07,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:07,503 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 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) [2021-06-06 00:11:08,213 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-06 00:11:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:08,331 INFO L93 Difference]: Finished difference Result 2432 states and 8093 transitions. [2021-06-06 00:11:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:11:08,331 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 [2021-06-06 00:11:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:08,334 INFO L225 Difference]: With dead ends: 2432 [2021-06-06 00:11:08,334 INFO L226 Difference]: Without dead ends: 2402 [2021-06-06 00:11:08,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1144.5ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:11:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-06 00:11:08,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1851. [2021-06-06 00:11:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1850 states have (on average 3.4135135135135135) internal successors, (6315), 1850 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 6315 transitions. [2021-06-06 00:11:08,357 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 6315 transitions. Word has length 26 [2021-06-06 00:11:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:08,357 INFO L482 AbstractCegarLoop]: Abstraction has 1851 states and 6315 transitions. [2021-06-06 00:11:08,357 INFO L483 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) [2021-06-06 00:11:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 6315 transitions. [2021-06-06 00:11:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:08,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:08,359 INFO L554 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] [2021-06-06 00:11:08,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:08,560 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:08,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-06-06 00:11:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:08,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728777990] [2021-06-06 00:11:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:08,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728777990] [2021-06-06 00:11:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728777990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672474624] [2021-06-06 00:11:08,891 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:08,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:08,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:08,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:11:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:09,117 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-06 00:11:09,265 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-06 00:11:09,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:09,493 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:09,493 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:11:09,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:09,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:09,515 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:09,516 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 [2021-06-06 00:11:09,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:09,677 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-06 00:11:09,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:09,704 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:09,705 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 35 treesize of output 33 [2021-06-06 00:11:09,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:09,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:09,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:09,722 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 35 treesize of output 37 [2021-06-06 00:11:09,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,035 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-06-06 00:11:10,035 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-06-06 00:11:10,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,055 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:10,055 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 [2021-06-06 00:11:10,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:10,071 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 [2021-06-06 00:11:10,076 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,216 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-06 00:11:10,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:10,233 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 [2021-06-06 00:11:10,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,255 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:10,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:10,256 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,514 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-06 00:11:10,514 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-06-06 00:11:10,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:10,531 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:385, output treesize:286 [2021-06-06 00:11:10,743 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-06 00:11:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:10,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672474624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:10,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:10,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:11:10,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571803341] [2021-06-06 00:11:10,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:10,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:10,841 INFO L87 Difference]: Start difference. First operand 1851 states and 6315 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:11,126 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-06 00:11:11,402 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-06 00:11:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:11,861 INFO L93 Difference]: Finished difference Result 2442 states and 8174 transitions. [2021-06-06 00:11:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:11:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:11:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:11,865 INFO L225 Difference]: With dead ends: 2442 [2021-06-06 00:11:11,865 INFO L226 Difference]: Without dead ends: 2427 [2021-06-06 00:11:11,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1637.5ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:11:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-06 00:11:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1869. [2021-06-06 00:11:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.4095289079229123) internal successors, (6369), 1868 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6369 transitions. [2021-06-06 00:11:11,889 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6369 transitions. Word has length 26 [2021-06-06 00:11:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:11,889 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6369 transitions. [2021-06-06 00:11:11,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6369 transitions. [2021-06-06 00:11:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:11,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:11,892 INFO L554 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] [2021-06-06 00:11:12,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:12,097 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-06-06 00:11:12,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:12,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230219282] [2021-06-06 00:11:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:12,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:12,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230219282] [2021-06-06 00:11:12,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230219282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:12,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811854575] [2021-06-06 00:11:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:12,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:11:12,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:12,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:11:12,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:12,806 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:11:13,053 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-06 00:11:13,136 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_256, v_prenex_257], 2=[A, v_prenex_258]} [2021-06-06 00:11:13,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:13,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:11:13,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:13,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:11:13,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:13,289 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-06 00:11:13,289 INFO L628 ElimStorePlain]: treesize reduction 130, result has 54.7 percent of original size [2021-06-06 00:11:13,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:13,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:11:13,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:13,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:13,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:13,353 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 [2021-06-06 00:11:13,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:13,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:13,359 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:13,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:13,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:13,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:13,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:13,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:13,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:13,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:13,452 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:317, output treesize:51 [2021-06-06 00:11:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:13,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811854575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:13,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:13,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:11:13,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523000241] [2021-06-06 00:11:13,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:11:13,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:11:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:11:13,510 INFO L87 Difference]: Start difference. First operand 1869 states and 6369 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,187 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:11:14,437 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-06-06 00:11:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:14,569 INFO L93 Difference]: Finished difference Result 1982 states and 6684 transitions. [2021-06-06 00:11:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:11:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:11:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:14,572 INFO L225 Difference]: With dead ends: 1982 [2021-06-06 00:11:14,572 INFO L226 Difference]: Without dead ends: 1967 [2021-06-06 00:11:14,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1506.0ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:11:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-06-06 00:11:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1890. [2021-06-06 00:11:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4060349391212283) internal successors, (6434), 1889 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6434 transitions. [2021-06-06 00:11:14,594 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6434 transitions. Word has length 26 [2021-06-06 00:11:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:14,594 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6434 transitions. [2021-06-06 00:11:14,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6434 transitions. [2021-06-06 00:11:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:14,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:14,596 INFO L554 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] [2021-06-06 00:11:14,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-06-06 00:11:14,796 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-06-06 00:11:14,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:14,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072495446] [2021-06-06 00:11:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:15,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:15,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072495446] [2021-06-06 00:11:15,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072495446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:15,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223068492] [2021-06-06 00:11:15,019 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:15,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:15,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:11:15,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:15,492 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:11:15,543 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_270, v_prenex_264, v_prenex_266], 3=[v_prenex_271, v_prenex_273, v_prenex_265, v_prenex_268]} [2021-06-06 00:11:15,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:15,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:15,557 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 [2021-06-06 00:11:15,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,682 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-06 00:11:15,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:15,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:15,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:15,696 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 [2021-06-06 00:11:15,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,821 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-06 00:11:15,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:15,834 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:15,834 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 [2021-06-06 00:11:15,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,954 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-06 00:11:15,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:15,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:15,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:15,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:15,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:16,084 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-06 00:11:16,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:16,097 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 [2021-06-06 00:11:16,100 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:16,211 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:11:16,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:16,224 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 [2021-06-06 00:11:16,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:16,335 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-06 00:11:16,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,348 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:11:16,348 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 25 treesize of output 19 [2021-06-06 00:11:16,349 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:16,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:16,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:16,460 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:11:16,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:16,462 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:16,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:16,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:16,564 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:194 [2021-06-06 00:11:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223068492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:16,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:16,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:11:16,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23154720] [2021-06-06 00:11:16,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:16,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:16,798 INFO L87 Difference]: Start difference. First operand 1890 states and 6434 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) [2021-06-06 00:11:17,521 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:11:17,908 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-06 00:11:18,123 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-06 00:11:18,341 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-06-06 00:11:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:18,445 INFO L93 Difference]: Finished difference Result 2744 states and 9064 transitions. [2021-06-06 00:11:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:11:18,445 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 [2021-06-06 00:11:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:18,449 INFO L225 Difference]: With dead ends: 2744 [2021-06-06 00:11:18,449 INFO L226 Difference]: Without dead ends: 2714 [2021-06-06 00:11:18,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2071.8ms TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:11:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-06 00:11:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1888. [2021-06-06 00:11:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.408055113937467) internal successors, (6431), 1887 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6431 transitions. [2021-06-06 00:11:18,474 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6431 transitions. Word has length 26 [2021-06-06 00:11:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:18,474 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6431 transitions. [2021-06-06 00:11:18,474 INFO L483 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) [2021-06-06 00:11:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6431 transitions. [2021-06-06 00:11:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:18,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:18,477 INFO L554 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] [2021-06-06 00:11:18,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:18,677 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-06-06 00:11:18,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:18,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678409027] [2021-06-06 00:11:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:19,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678409027] [2021-06-06 00:11:19,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678409027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490783799] [2021-06-06 00:11:19,059 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:19,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:11:19,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:11:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:19,486 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-06 00:11:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:19,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:19,620 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 [2021-06-06 00:11:19,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:19,638 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:19,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:19,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:19,789 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-06 00:11:19,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:19,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:19,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:19,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:19,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:19,815 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 [2021-06-06 00:11:19,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:19,935 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:11:19,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:19,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:19,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:19,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:19,961 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:19,961 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 [2021-06-06 00:11:19,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:20,070 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:11:20,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:20,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:20,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:20,082 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 [2021-06-06 00:11:20,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:20,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:20,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:20,093 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 [2021-06-06 00:11:20,094 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:20,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:20,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:20,207 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-06-06 00:11:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:20,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490783799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:20,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:20,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:11:20,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345371718] [2021-06-06 00:11:20,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:20,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:20,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:20,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:20,404 INFO L87 Difference]: Start difference. First operand 1888 states and 6431 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) [2021-06-06 00:11:21,294 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-06 00:11:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:21,350 INFO L93 Difference]: Finished difference Result 2422 states and 8105 transitions. [2021-06-06 00:11:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:11:21,350 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 [2021-06-06 00:11:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:21,353 INFO L225 Difference]: With dead ends: 2422 [2021-06-06 00:11:21,353 INFO L226 Difference]: Without dead ends: 2397 [2021-06-06 00:11:21,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1428.3ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:11:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-06-06 00:11:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1888. [2021-06-06 00:11:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-06-06 00:11:21,376 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-06-06 00:11:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:21,376 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-06-06 00:11:21,376 INFO L483 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) [2021-06-06 00:11:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-06-06 00:11:21,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:21,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:21,379 INFO L554 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] [2021-06-06 00:11:21,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3141 [2021-06-06 00:11:21,581 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-06-06 00:11:21,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:21,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074881507] [2021-06-06 00:11:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:21,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:21,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074881507] [2021-06-06 00:11:21,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074881507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:21,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176827952] [2021-06-06 00:11:21,985 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:22,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:11:22,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:22,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:11:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:22,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,211 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,211 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 [2021-06-06 00:11:22,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,220 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,220 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 26 treesize of output 16 [2021-06-06 00:11:22,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:22,231 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 [2021-06-06 00:11:22,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,242 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 [2021-06-06 00:11:22,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:22,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:22,257 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:22,268 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 [2021-06-06 00:11:22,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,278 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 [2021-06-06 00:11:22,278 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:22,289 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 [2021-06-06 00:11:22,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,303 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 [2021-06-06 00:11:22,303 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:22,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:22,316 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,325 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,325 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 [2021-06-06 00:11:22,325 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,334 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,334 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 [2021-06-06 00:11:22,335 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:22,346 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 [2021-06-06 00:11:22,348 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,358 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:22,358 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 [2021-06-06 00:11:22,360 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,371 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:22,371 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 [2021-06-06 00:11:22,372 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:22,378 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:22,378 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 31 treesize of output 19 [2021-06-06 00:11:22,378 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:22,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:22,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:22,454 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:11:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:22,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176827952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:22,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:22,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:22,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012172062] [2021-06-06 00:11:22,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:22,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:22,676 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 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) [2021-06-06 00:11:23,502 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-06 00:11:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:23,566 INFO L93 Difference]: Finished difference Result 2430 states and 8144 transitions. [2021-06-06 00:11:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:11:23,566 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 [2021-06-06 00:11:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:23,569 INFO L225 Difference]: With dead ends: 2430 [2021-06-06 00:11:23,569 INFO L226 Difference]: Without dead ends: 2415 [2021-06-06 00:11:23,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1232.9ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:11:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-06 00:11:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1888. [2021-06-06 00:11:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-06-06 00:11:23,593 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-06-06 00:11:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:23,593 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-06-06 00:11:23,593 INFO L483 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) [2021-06-06 00:11:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-06-06 00:11:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:23,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:23,595 INFO L554 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] [2021-06-06 00:11:23,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3174 [2021-06-06 00:11:23,796 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-06-06 00:11:23,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:23,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638501914] [2021-06-06 00:11:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:24,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:24,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638501914] [2021-06-06 00:11:24,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638501914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:24,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486491965] [2021-06-06 00:11:24,289 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:24,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:11:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:24,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,904 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 [2021-06-06 00:11:24,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,913 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 41 treesize of output 13 [2021-06-06 00:11:24,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,923 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 [2021-06-06 00:11:24,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,932 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 39 treesize of output 13 [2021-06-06 00:11:24,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,943 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 [2021-06-06 00:11:24,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,953 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 [2021-06-06 00:11:24,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,963 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 [2021-06-06 00:11:24,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,973 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 28 treesize of output 13 [2021-06-06 00:11:24,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:11:24,983 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,991 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 [2021-06-06 00:11:24,992 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:24,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:24,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:24,999 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 [2021-06-06 00:11:25,000 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:25,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:25,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,007 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 33 treesize of output 13 [2021-06-06 00:11:25,008 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:25,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,014 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 [2021-06-06 00:11:25,015 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:25,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:25,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,021 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 [2021-06-06 00:11:25,022 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:25,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:25,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:25,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:11:25,027 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:25,053 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-06 00:11:25,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:11:25,055 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:11:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:25,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486491965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:25,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:25,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:11:25,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913158339] [2021-06-06 00:11:25,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:25,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:25,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:25,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:25,084 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:25,780 INFO L93 Difference]: Finished difference Result 2457 states and 7898 transitions. [2021-06-06 00:11:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:11:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:11:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:25,784 INFO L225 Difference]: With dead ends: 2457 [2021-06-06 00:11:25,784 INFO L226 Difference]: Without dead ends: 2420 [2021-06-06 00:11:25,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1068.4ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:11:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-06-06 00:11:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1914. [2021-06-06 00:11:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.410350235232619) internal successors, (6524), 1913 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) [2021-06-06 00:11:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6524 transitions. [2021-06-06 00:11:25,809 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6524 transitions. Word has length 26 [2021-06-06 00:11:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:25,809 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6524 transitions. [2021-06-06 00:11:25,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6524 transitions. [2021-06-06 00:11:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:25,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:25,811 INFO L554 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] [2021-06-06 00:11:26,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3191 [2021-06-06 00:11:26,012 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-06-06 00:11:26,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:26,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093616657] [2021-06-06 00:11:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:26,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:26,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093616657] [2021-06-06 00:11:26,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093616657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:26,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889830775] [2021-06-06 00:11:26,295 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:26,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:26,582 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-06 00:11:26,633 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_283, v_prenex_285], 6=[A, v_prenex_287]} [2021-06-06 00:11:26,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:26,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:26,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-06 00:11:26,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:26,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:11:26,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,755 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-06 00:11:26,755 INFO L628 ElimStorePlain]: treesize reduction 166, result has 44.9 percent of original size [2021-06-06 00:11:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:11:26,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,800 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 [2021-06-06 00:11:26,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:26,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:26,837 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 [2021-06-06 00:11:26,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:26,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:11:26,869 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-06-06 00:11:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:26,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889830775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:26,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:26,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:11:26,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130761464] [2021-06-06 00:11:26,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:11:26,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:11:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:11:26,916 INFO L87 Difference]: Start difference. First operand 1914 states and 6524 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:27,841 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-06 00:11:28,010 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-06 00:11:28,158 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-06 00:11:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:28,276 INFO L93 Difference]: Finished difference Result 2392 states and 7936 transitions. [2021-06-06 00:11:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:11:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:11:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:28,280 INFO L225 Difference]: With dead ends: 2392 [2021-06-06 00:11:28,280 INFO L226 Difference]: Without dead ends: 2346 [2021-06-06 00:11:28,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1445.2ms TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:11:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-06 00:11:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1910. [2021-06-06 00:11:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.4038763750654795) internal successors, (6498), 1909 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6498 transitions. [2021-06-06 00:11:28,302 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6498 transitions. Word has length 26 [2021-06-06 00:11:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:28,303 INFO L482 AbstractCegarLoop]: Abstraction has 1910 states and 6498 transitions. [2021-06-06 00:11:28,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6498 transitions. [2021-06-06 00:11:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:28,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:28,305 INFO L554 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] [2021-06-06 00:11:28,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3305 [2021-06-06 00:11:28,505 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-06-06 00:11:28,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:28,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578657115] [2021-06-06 00:11:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:28,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578657115] [2021-06-06 00:11:28,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578657115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301935520] [2021-06-06 00:11:28,886 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:28,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:11:28,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:28,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:28,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:29,349 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:11:29,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,652 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-06 00:11:29,652 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 [2021-06-06 00:11:29,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,684 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:11:29,684 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 [2021-06-06 00:11:29,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:30,060 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-06 00:11:30,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,098 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:11:30,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:11:30,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,126 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:11:30,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:11:30,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:30,500 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-06 00:11:30,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:30,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:30,534 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 [2021-06-06 00:11:30,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,555 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:11:30,555 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 [2021-06-06 00:11:30,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:30,877 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-06 00:11:30,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,911 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:11:30,911 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 [2021-06-06 00:11:30,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:30,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:30,937 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:11:30,937 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 [2021-06-06 00:11:30,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,242 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-06 00:11:31,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:31,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:11:31,296 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,324 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:11:31,324 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 [2021-06-06 00:11:31,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:32,180 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 124 [2021-06-06 00:11:32,181 INFO L628 ElimStorePlain]: treesize reduction 40, result has 93.4 percent of original size [2021-06-06 00:11:32,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,214 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:11:32,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:11:32,218 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,232 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:11:32,232 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 [2021-06-06 00:11:32,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:32,461 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-06 00:11:32,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:32,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,508 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:11:32,508 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 28 [2021-06-06 00:11:32,510 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,542 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:11:32,542 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 [2021-06-06 00:11:32,548 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:32,956 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-06-06 00:11:32,957 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.7 percent of original size [2021-06-06 00:11:32,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,983 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:11:32,983 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 [2021-06-06 00:11:32,985 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:32,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:33,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:33,005 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 [2021-06-06 00:11:33,013 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:33,191 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-06 00:11:33,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:33,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-06 00:11:33,215 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-06-06 00:11:33,384 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-06-06 00:11:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:33,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301935520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:33,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:33,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:11:33,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511646198] [2021-06-06 00:11:33,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:33,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:33,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:33,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:33,412 INFO L87 Difference]: Start difference. First operand 1910 states and 6498 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-06 00:11:34,646 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-06 00:11:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:34,940 INFO L93 Difference]: Finished difference Result 2172 states and 7282 transitions. [2021-06-06 00:11:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:11:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-06 00:11:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:34,943 INFO L225 Difference]: With dead ends: 2172 [2021-06-06 00:11:34,943 INFO L226 Difference]: Without dead ends: 2157 [2021-06-06 00:11:34,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1737.9ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:11:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-06-06 00:11:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1922. [2021-06-06 00:11:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.407600208224883) internal successors, (6546), 1921 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6546 transitions. [2021-06-06 00:11:34,976 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6546 transitions. Word has length 26 [2021-06-06 00:11:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:34,976 INFO L482 AbstractCegarLoop]: Abstraction has 1922 states and 6546 transitions. [2021-06-06 00:11:34,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-06 00:11:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6546 transitions. [2021-06-06 00:11:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:34,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:34,979 INFO L554 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] [2021-06-06 00:11:35,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-06-06 00:11:35,179 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:35,179 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-06-06 00:11:35,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:35,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595352552] [2021-06-06 00:11:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:35,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:35,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595352552] [2021-06-06 00:11:35,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595352552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:35,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123087364] [2021-06-06 00:11:35,610 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:35,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:36,000 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-06 00:11:36,033 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_307, v_prenex_309]} [2021-06-06 00:11:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:36,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:11:36,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:36,150 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-06 00:11:36,150 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-06 00:11:36,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:36,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:36,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:36,156 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 [2021-06-06 00:11:36,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:36,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:36,161 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:11:36,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:36,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:36,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:36,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:36,206 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 [2021-06-06 00:11:36,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:36,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:36,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:36,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-06 00:11:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:36,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123087364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:36,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:36,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:11:36,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711898795] [2021-06-06 00:11:36,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:36,309 INFO L87 Difference]: Start difference. First operand 1922 states and 6546 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) [2021-06-06 00:11:36,918 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-06 00:11:37,268 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-06 00:11:37,437 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-06 00:11:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:37,614 INFO L93 Difference]: Finished difference Result 2493 states and 8257 transitions. [2021-06-06 00:11:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:11:37,614 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 [2021-06-06 00:11:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:37,617 INFO L225 Difference]: With dead ends: 2493 [2021-06-06 00:11:37,617 INFO L226 Difference]: Without dead ends: 2478 [2021-06-06 00:11:37,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1627.1ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:11:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-06 00:11:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1933. [2021-06-06 00:11:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.4078674948240164) internal successors, (6584), 1932 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) [2021-06-06 00:11:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6584 transitions. [2021-06-06 00:11:37,641 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6584 transitions. Word has length 26 [2021-06-06 00:11:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:37,641 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6584 transitions. [2021-06-06 00:11:37,641 INFO L483 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) [2021-06-06 00:11:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6584 transitions. [2021-06-06 00:11:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:37,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:37,643 INFO L554 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] [2021-06-06 00:11:37,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:37,844 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:37,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-06-06 00:11:37,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:37,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342763874] [2021-06-06 00:11:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:38,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342763874] [2021-06-06 00:11:38,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342763874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894123654] [2021-06-06 00:11:38,184 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:38,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:38,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:38,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:38,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:38,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,722 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 [2021-06-06 00:11:38,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,730 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 [2021-06-06 00:11:38,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:11:38,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,757 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 39 treesize of output 13 [2021-06-06 00:11:38,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,765 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 [2021-06-06 00:11:38,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,772 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 [2021-06-06 00:11:38,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,780 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 28 treesize of output 13 [2021-06-06 00:11:38,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,788 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 [2021-06-06 00:11:38,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,795 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 [2021-06-06 00:11:38,796 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,803 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 [2021-06-06 00:11:38,803 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,810 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 [2021-06-06 00:11:38,811 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,817 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 [2021-06-06 00:11:38,818 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,824 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 37 treesize of output 19 [2021-06-06 00:11:38,825 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,831 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 [2021-06-06 00:11:38,832 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:38,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:38,835 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 [2021-06-06 00:11:38,837 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:38,862 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-06-06 00:11:38,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:11:38,864 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:11:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:38,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894123654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:38,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:38,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-06 00:11:38,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749097896] [2021-06-06 00:11:38,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:38,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:38,893 INFO L87 Difference]: Start difference. First operand 1933 states and 6584 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2021-06-06 00:11:39,407 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-06 00:11:39,749 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-06 00:11:40,300 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-06 00:11:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:40,696 INFO L93 Difference]: Finished difference Result 3085 states and 9838 transitions. [2021-06-06 00:11:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:11:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 [2021-06-06 00:11:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:40,701 INFO L225 Difference]: With dead ends: 3085 [2021-06-06 00:11:40,701 INFO L226 Difference]: Without dead ends: 3042 [2021-06-06 00:11:40,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1799.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:11:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-06-06 00:11:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2025. [2021-06-06 00:11:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4234189723320156) internal successors, (6929), 2024 states have internal predecessors, (6929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6929 transitions. [2021-06-06 00:11:40,730 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6929 transitions. Word has length 26 [2021-06-06 00:11:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:40,730 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 6929 transitions. [2021-06-06 00:11:40,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2021-06-06 00:11:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6929 transitions. [2021-06-06 00:11:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:40,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:40,732 INFO L554 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] [2021-06-06 00:11:40,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-06 00:11:40,932 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:40,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-06-06 00:11:40,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:40,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16461860] [2021-06-06 00:11:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:41,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:41,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16461860] [2021-06-06 00:11:41,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16461860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:41,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358975991] [2021-06-06 00:11:41,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:41,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:41,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:11:41,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:41,946 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-06 00:11:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,612 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:42,612 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:11:42,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,791 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-06 00:11:42,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,813 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 [2021-06-06 00:11:42,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,980 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-06 00:11:42,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,006 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:43,007 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 [2021-06-06 00:11:43,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,170 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-06 00:11:43,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,192 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 [2021-06-06 00:11:43,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,354 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-06 00:11:43,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,377 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:43,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:43,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,537 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-06 00:11:43,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,562 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:43,562 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 [2021-06-06 00:11:43,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,718 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-06 00:11:43,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,743 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 16 treesize of output 26 [2021-06-06 00:11:43,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,894 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-06 00:11:43,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,918 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:43,918 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:11:43,920 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,076 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:11:44,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:44,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:44,099 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:513 [2021-06-06 00:11:44,477 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-06 00:11:44,759 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-06 00:11:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:44,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358975991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:44,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:44,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:11:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230439178] [2021-06-06 00:11:44,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:11:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:44,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:11:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:11:44,874 INFO L87 Difference]: Start difference. First operand 2025 states and 6929 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) [2021-06-06 00:11:45,323 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-06 00:11:45,839 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-06-06 00:11:46,234 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-06 00:11:46,606 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-06-06 00:11:47,276 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-06-06 00:11:47,534 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-06 00:11:48,040 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 120 [2021-06-06 00:11:48,548 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2021-06-06 00:11:49,053 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2021-06-06 00:11:49,587 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 138 [2021-06-06 00:11:50,004 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-06 00:11:50,556 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2021-06-06 00:11:50,906 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 84 [2021-06-06 00:11:51,402 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-06-06 00:11:51,891 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-06-06 00:11:52,194 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-06 00:11:52,840 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 91 [2021-06-06 00:11:53,172 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-06-06 00:11:53,642 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 57 [2021-06-06 00:11:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:53,747 INFO L93 Difference]: Finished difference Result 2870 states and 9420 transitions. [2021-06-06 00:11:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:11:53,748 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 [2021-06-06 00:11:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:53,752 INFO L225 Difference]: With dead ends: 2870 [2021-06-06 00:11:53,752 INFO L226 Difference]: Without dead ends: 2855 [2021-06-06 00:11:53,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 9290.7ms TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:11:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-06-06 00:11:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2033. [2021-06-06 00:11:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4247047244094486) internal successors, (6959), 2032 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6959 transitions. [2021-06-06 00:11:53,779 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6959 transitions. Word has length 26 [2021-06-06 00:11:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:53,779 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6959 transitions. [2021-06-06 00:11:53,779 INFO L483 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) [2021-06-06 00:11:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6959 transitions. [2021-06-06 00:11:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:53,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:53,781 INFO L554 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] [2021-06-06 00:11:53,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3503,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:53,983 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash 719147274, now seen corresponding path program 51 times [2021-06-06 00:11:53,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:53,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709531497] [2021-06-06 00:11:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:54,259 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-06 00:11:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:54,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:54,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709531497] [2021-06-06 00:11:54,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709531497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:54,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175529778] [2021-06-06 00:11:54,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:54,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:11:54,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:54,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:54,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:54,808 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:11:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:54,865 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 33 treesize of output 27 [2021-06-06 00:11:54,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,986 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-06 00:11:54,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:55,000 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:55,000 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 [2021-06-06 00:11:55,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:55,117 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-06 00:11:55,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:55,131 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:55,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:55,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:55,244 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-06 00:11:55,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:55,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:55,257 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 [2021-06-06 00:11:55,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:55,367 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-06 00:11:55,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:55,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,379 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 [2021-06-06 00:11:55,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:55,486 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-06 00:11:55,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:55,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,498 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 [2021-06-06 00:11:55,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:55,606 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:11:55,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:55,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,616 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 [2021-06-06 00:11:55,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:55,729 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-06 00:11:55,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:55,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:11:55,743 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:55,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:55,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:55,840 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-06 00:11:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:56,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175529778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:56,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:56,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:11:56,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331750714] [2021-06-06 00:11:56,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:56,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:56,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:56,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:56,026 INFO L87 Difference]: Start difference. First operand 2033 states and 6959 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) [2021-06-06 00:11:56,433 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-06 00:11:56,917 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-06 00:11:57,431 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-06 00:11:57,586 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-06 00:11:57,798 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-06 00:11:57,988 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-06-06 00:11:58,374 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-06 00:11:58,583 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-06 00:11:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:58,707 INFO L93 Difference]: Finished difference Result 2982 states and 9848 transitions. [2021-06-06 00:11:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:11:58,707 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 [2021-06-06 00:11:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:58,711 INFO L225 Difference]: With dead ends: 2982 [2021-06-06 00:11:58,712 INFO L226 Difference]: Without dead ends: 2967 [2021-06-06 00:11:58,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2871.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:11:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-06 00:11:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2028. [2021-06-06 00:11:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 3.4257523433645782) internal successors, (6944), 2027 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 6944 transitions. [2021-06-06 00:11:58,750 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 6944 transitions. Word has length 26 [2021-06-06 00:11:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:58,750 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 6944 transitions. [2021-06-06 00:11:58,750 INFO L483 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) [2021-06-06 00:11:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 6944 transitions. [2021-06-06 00:11:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:58,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:58,752 INFO L554 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] [2021-06-06 00:11:58,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3569 [2021-06-06 00:11:58,953 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-06-06 00:11:58,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:58,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478550238] [2021-06-06 00:11:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:59,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:59,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478550238] [2021-06-06 00:11:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478550238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:59,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566688227] [2021-06-06 00:11:59,263 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:59,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:11:59,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:59,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:11:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:59,741 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-06 00:12:00,115 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-06-06 00:12:00,363 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-06-06 00:12:00,593 INFO L446 ElimStorePlain]: Different costs {20=[v_prenex_385], 27=[A]} [2021-06-06 00:12:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:00,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,614 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 [2021-06-06 00:12:00,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,625 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 21 treesize of output 13 [2021-06-06 00:12:00,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:00,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,635 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 30 treesize of output 13 [2021-06-06 00:12:00,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:00,774 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-06 00:12:00,774 INFO L628 ElimStorePlain]: treesize reduction 114, result has 56.3 percent of original size [2021-06-06 00:12:00,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:12:00,781 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:00,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:00,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:00,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:12:00,786 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:00,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:00,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:12:00,837 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:399, output treesize:89 [2021-06-06 00:12:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:00,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566688227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:00,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:00,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-06 00:12:00,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202069686] [2021-06-06 00:12:00,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:12:00,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:12:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:00,920 INFO L87 Difference]: Start difference. First operand 2028 states and 6944 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) [2021-06-06 00:12:01,763 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-06 00:12:02,224 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-06-06 00:12:02,437 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-06 00:12:02,811 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 71 [2021-06-06 00:12:03,210 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-06 00:12:03,523 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-06-06 00:12:03,936 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2021-06-06 00:12:04,328 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2021-06-06 00:12:04,591 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 47 [2021-06-06 00:12:05,046 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-06-06 00:12:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:05,169 INFO L93 Difference]: Finished difference Result 3633 states and 11658 transitions. [2021-06-06 00:12:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:12:05,170 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 [2021-06-06 00:12:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:05,174 INFO L225 Difference]: With dead ends: 3633 [2021-06-06 00:12:05,174 INFO L226 Difference]: Without dead ends: 3546 [2021-06-06 00:12:05,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 4546.7ms TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:12:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-06 00:12:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2151. [2021-06-06 00:12:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.4288372093023254) internal successors, (7372), 2150 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7372 transitions. [2021-06-06 00:12:05,207 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7372 transitions. Word has length 26 [2021-06-06 00:12:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:05,207 INFO L482 AbstractCegarLoop]: Abstraction has 2151 states and 7372 transitions. [2021-06-06 00:12:05,207 INFO L483 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) [2021-06-06 00:12:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7372 transitions. [2021-06-06 00:12:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:05,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:05,209 INFO L554 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] [2021-06-06 00:12:05,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-06-06 00:12:05,410 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-06-06 00:12:05,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:05,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935458833] [2021-06-06 00:12:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:05,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:05,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935458833] [2021-06-06 00:12:05,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935458833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124964210] [2021-06-06 00:12:05,692 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:05,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:12:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:05,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:12:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:05,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:05,981 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 29 treesize of output 53 [2021-06-06 00:12:05,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:12:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,029 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:12:06,029 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 44 [2021-06-06 00:12:06,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,072 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:12:06,072 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 40 [2021-06-06 00:12:06,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,118 INFO L354 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2021-06-06 00:12:06,118 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 49 [2021-06-06 00:12:06,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,155 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-06 00:12:06,155 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 27 [2021-06-06 00:12:06,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,175 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,175 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 [2021-06-06 00:12:06,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,194 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-06 00:12:06,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,214 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-06 00:12:06,214 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,233 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,233 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 [2021-06-06 00:12:06,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,253 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,253 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 [2021-06-06 00:12:06,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,272 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,272 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 [2021-06-06 00:12:06,273 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,291 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,291 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 38 treesize of output 1 [2021-06-06 00:12:06,292 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,309 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:12:06,309 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 [2021-06-06 00:12:06,310 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,356 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-06 00:12:06,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 20 [2021-06-06 00:12:06,359 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:06,381 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:12:06,381 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 1 [2021-06-06 00:12:06,382 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-06 00:12:06,387 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:06,535 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-06-06 00:12:06,536 INFO L628 ElimStorePlain]: treesize reduction 130, result has 42.2 percent of original size [2021-06-06 00:12:06,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:12:06,537 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:95 [2021-06-06 00:12:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:06,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124964210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:06,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:06,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:12:06,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572623604] [2021-06-06 00:12:06,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:12:06,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:06,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:12:06,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:12:06,751 INFO L87 Difference]: Start difference. First operand 2151 states and 7372 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-06-06 00:12:08,130 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-06-06 00:12:08,528 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-06 00:12:08,750 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-06 00:12:08,882 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-06 00:12:09,097 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-06 00:12:09,397 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-06 00:12:09,847 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-06 00:12:10,038 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-06-06 00:12:10,362 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-06-06 00:12:10,543 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-06 00:12:10,891 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-06-06 00:12:11,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:11,010 INFO L93 Difference]: Finished difference Result 3952 states and 12614 transitions. [2021-06-06 00:12:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:12:11,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 [2021-06-06 00:12:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:11,016 INFO L225 Difference]: With dead ends: 3952 [2021-06-06 00:12:11,016 INFO L226 Difference]: Without dead ends: 3864 [2021-06-06 00:12:11,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 3923.5ms TimeCoverageRelationStatistics Valid=560, Invalid=2980, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:12:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-06 00:12:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 2137. [2021-06-06 00:12:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.431179775280899) internal successors, (7329), 2136 states have internal predecessors, (7329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7329 transitions. [2021-06-06 00:12:11,050 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7329 transitions. Word has length 26 [2021-06-06 00:12:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:11,050 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7329 transitions. [2021-06-06 00:12:11,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-06-06 00:12:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7329 transitions. [2021-06-06 00:12:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:11,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:11,053 INFO L554 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] [2021-06-06 00:12:11,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3606 [2021-06-06 00:12:11,275 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:11,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1912368818, now seen corresponding path program 52 times [2021-06-06 00:12:11,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:11,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710312585] [2021-06-06 00:12:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:11,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:11,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710312585] [2021-06-06 00:12:11,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710312585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:11,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251744904] [2021-06-06 00:12:11,767 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:11,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:11,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:11,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:12,146 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:12:12,320 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2021-06-06 00:12:12,382 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_397, v_prenex_398]} [2021-06-06 00:12:12,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:12,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:12:12,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:12,496 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-06 00:12:12,496 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-06 00:12:12,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:12,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:12:12,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:12,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:12,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:12,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:12,569 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 [2021-06-06 00:12:12,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:12,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:12,573 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 [2021-06-06 00:12:12,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:12,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:12,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:12:12,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-06 00:12:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:12,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251744904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:12,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:12,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992665125] [2021-06-06 00:12:12,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:12,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:12,672 INFO L87 Difference]: Start difference. First operand 2137 states and 7329 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) [2021-06-06 00:12:13,600 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-06 00:12:13,777 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-06 00:12:14,179 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-06 00:12:14,408 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-06 00:12:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:14,541 INFO L93 Difference]: Finished difference Result 2703 states and 9088 transitions. [2021-06-06 00:12:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:12:14,542 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 [2021-06-06 00:12:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:14,545 INFO L225 Difference]: With dead ends: 2703 [2021-06-06 00:12:14,545 INFO L226 Difference]: Without dead ends: 2688 [2021-06-06 00:12:14,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2253.8ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:12:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-06 00:12:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2150. [2021-06-06 00:12:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 3.4290367612843182) internal successors, (7369), 2149 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 7369 transitions. [2021-06-06 00:12:14,568 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 7369 transitions. Word has length 26 [2021-06-06 00:12:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:14,568 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 7369 transitions. [2021-06-06 00:12:14,568 INFO L483 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) [2021-06-06 00:12:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 7369 transitions. [2021-06-06 00:12:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:14,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:14,571 INFO L554 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] [2021-06-06 00:12:14,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3641,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:14,771 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:14,772 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 53 times [2021-06-06 00:12:14,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:14,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399344036] [2021-06-06 00:12:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:15,071 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-06 00:12:15,197 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-06 00:12:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:15,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399344036] [2021-06-06 00:12:15,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399344036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187689445] [2021-06-06 00:12:15,314 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:15,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:12:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:15,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:12:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:15,920 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-06 00:12:16,025 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_421, v_prenex_410, v_prenex_412], 6=[v_prenex_415, v_prenex_405, v_prenex_418, v_prenex_408]} [2021-06-06 00:12:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,054 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:16,054 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 [2021-06-06 00:12:16,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,425 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-06-06 00:12:16,426 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-06-06 00:12:16,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,451 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:16,452 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 [2021-06-06 00:12:16,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,606 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-06 00:12:16,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,632 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:16,632 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 [2021-06-06 00:12:16,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,807 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-06 00:12:16,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:16,829 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 [2021-06-06 00:12:16,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:17,115 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2021-06-06 00:12:17,115 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-06-06 00:12:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:17,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:17,134 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 16 treesize of output 26 [2021-06-06 00:12:17,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:17,275 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-06 00:12:17,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:17,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:17,295 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 32 [2021-06-06 00:12:17,301 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:17,558 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2021-06-06 00:12:17,559 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.0 percent of original size [2021-06-06 00:12:17,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:17,580 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:17,580 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 [2021-06-06 00:12:17,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:17,705 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-06 00:12:17,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:17,726 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:17,726 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 24 [2021-06-06 00:12:17,728 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:17,847 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-06 00:12:17,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:17,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:12:17,866 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:334 [2021-06-06 00:12:18,087 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-06 00:12:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:18,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187689445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:18,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:18,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:12:18,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100405272] [2021-06-06 00:12:18,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:12:18,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:18,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:12:18,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:18,238 INFO L87 Difference]: Start difference. First operand 2150 states and 7369 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) [2021-06-06 00:12:18,905 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2021-06-06 00:12:19,385 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-06 00:12:19,609 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-06 00:12:19,962 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-06 00:12:20,196 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-06 00:12:20,582 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-06 00:12:20,831 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-06 00:12:21,264 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-06-06 00:12:21,645 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-06-06 00:12:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:21,715 INFO L93 Difference]: Finished difference Result 3064 states and 10226 transitions. [2021-06-06 00:12:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:12:21,715 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 [2021-06-06 00:12:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:21,719 INFO L225 Difference]: With dead ends: 3064 [2021-06-06 00:12:21,720 INFO L226 Difference]: Without dead ends: 3049 [2021-06-06 00:12:21,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3934.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:12:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-06 00:12:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2147. [2021-06-06 00:12:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.428238583410997) internal successors, (7357), 2146 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7357 transitions. [2021-06-06 00:12:21,747 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7357 transitions. Word has length 26 [2021-06-06 00:12:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:21,747 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7357 transitions. [2021-06-06 00:12:21,747 INFO L483 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) [2021-06-06 00:12:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7357 transitions. [2021-06-06 00:12:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:21,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:21,762 INFO L554 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] [2021-06-06 00:12:21,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3651,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:21,962 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 54 times [2021-06-06 00:12:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:21,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349051648] [2021-06-06 00:12:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:22,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349051648] [2021-06-06 00:12:22,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349051648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531169698] [2021-06-06 00:12:22,382 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:22,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:12:22,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:22,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:12:22,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:22,764 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-06 00:12:22,818 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_426, v_prenex_425], 6=[A, v_prenex_427]} [2021-06-06 00:12:22,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:22,833 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 34 treesize of output 30 [2021-06-06 00:12:22,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:22,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,847 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:12:22,847 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 27 treesize of output 23 [2021-06-06 00:12:22,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:22,993 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-06 00:12:22,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:22,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,007 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 22 treesize of output 24 [2021-06-06 00:12:23,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,023 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:12:23,023 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 29 treesize of output 23 [2021-06-06 00:12:23,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,175 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-06 00:12:23,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:23,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,191 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 38 treesize of output 28 [2021-06-06 00:12:23,195 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,208 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:12:23,208 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 38 treesize of output 24 [2021-06-06 00:12:23,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,325 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:12:23,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:23,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,341 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 43 treesize of output 31 [2021-06-06 00:12:23,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,354 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 43 treesize of output 31 [2021-06-06 00:12:23,355 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,462 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-06 00:12:23,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:12:23,469 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:409, output treesize:246 [2021-06-06 00:12:23,637 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-06 00:12:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531169698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:23,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:23,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913130390] [2021-06-06 00:12:23,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:23,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:23,733 INFO L87 Difference]: Start difference. First operand 2147 states and 7357 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) [2021-06-06 00:12:24,474 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-06 00:12:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:25,296 INFO L93 Difference]: Finished difference Result 2844 states and 9528 transitions. [2021-06-06 00:12:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:12:25,296 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 [2021-06-06 00:12:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:25,300 INFO L225 Difference]: With dead ends: 2844 [2021-06-06 00:12:25,300 INFO L226 Difference]: Without dead ends: 2819 [2021-06-06 00:12:25,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1958.8ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:12:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-06-06 00:12:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2143. [2021-06-06 00:12:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.429971988795518) internal successors, (7347), 2142 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7347 transitions. [2021-06-06 00:12:25,325 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7347 transitions. Word has length 26 [2021-06-06 00:12:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:25,325 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7347 transitions. [2021-06-06 00:12:25,325 INFO L483 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) [2021-06-06 00:12:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7347 transitions. [2021-06-06 00:12:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:25,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:25,328 INFO L554 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] [2021-06-06 00:12:25,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:25,528 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-06-06 00:12:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:25,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61351510] [2021-06-06 00:12:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:25,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:25,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61351510] [2021-06-06 00:12:25,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61351510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:25,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357687004] [2021-06-06 00:12:25,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:26,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,436 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 [2021-06-06 00:12:26,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:26,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,451 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 41 treesize of output 13 [2021-06-06 00:12:26,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:26,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,466 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 [2021-06-06 00:12:26,467 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:26,474 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:26,482 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:26,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:26,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,505 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 30 treesize of output 16 [2021-06-06 00:12:26,506 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,512 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 32 treesize of output 16 [2021-06-06 00:12:26,513 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,520 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 [2021-06-06 00:12:26,520 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,527 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 [2021-06-06 00:12:26,528 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,534 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 [2021-06-06 00:12:26,535 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:26,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:26,539 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 [2021-06-06 00:12:26,539 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:26,566 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-06 00:12:26,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:12:26,567 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:12:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:26,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357687004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:26,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:26,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:12:26,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790262226] [2021-06-06 00:12:26,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:12:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:26,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:12:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:12:26,584 INFO L87 Difference]: Start difference. First operand 2143 states and 7347 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:27,965 INFO L93 Difference]: Finished difference Result 2873 states and 9612 transitions. [2021-06-06 00:12:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:12:27,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:12:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:27,969 INFO L225 Difference]: With dead ends: 2873 [2021-06-06 00:12:27,969 INFO L226 Difference]: Without dead ends: 2851 [2021-06-06 00:12:27,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1398.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:12:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-06 00:12:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2169. [2021-06-06 00:12:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.4321955719557193) internal successors, (7441), 2168 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7441 transitions. [2021-06-06 00:12:27,997 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7441 transitions. Word has length 26 [2021-06-06 00:12:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:27,997 INFO L482 AbstractCegarLoop]: Abstraction has 2169 states and 7441 transitions. [2021-06-06 00:12:27,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7441 transitions. [2021-06-06 00:12:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:27,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:28,000 INFO L554 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] [2021-06-06 00:12:28,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3718 [2021-06-06 00:12:28,200 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:28,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-06-06 00:12:28,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:28,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257961331] [2021-06-06 00:12:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:28,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257961331] [2021-06-06 00:12:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257961331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110107595] [2021-06-06 00:12:28,466 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:28,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:28,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:28,816 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-06 00:12:28,867 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_428, v_prenex_432], 5=[A, v_prenex_430]} [2021-06-06 00:12:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,875 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 13 [2021-06-06 00:12:28,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:28,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,881 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 [2021-06-06 00:12:28,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:28,969 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.6 percent of original size [2021-06-06 00:12:28,970 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-06-06 00:12:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,975 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 [2021-06-06 00:12:28,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:29,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:29,009 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 29 treesize of output 13 [2021-06-06 00:12:29,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:29,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:29,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:12:29,039 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:33 [2021-06-06 00:12:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:29,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110107595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:29,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:29,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:12:29,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951248323] [2021-06-06 00:12:29,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:29,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:29,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:29,087 INFO L87 Difference]: Start difference. First operand 2169 states and 7441 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) [2021-06-06 00:12:30,642 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-06 00:12:30,770 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-06 00:12:30,924 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-06 00:12:31,077 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-06 00:12:31,214 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-06 00:12:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:31,472 INFO L93 Difference]: Finished difference Result 3222 states and 10652 transitions. [2021-06-06 00:12:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:12:31,472 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 [2021-06-06 00:12:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:31,476 INFO L225 Difference]: With dead ends: 3222 [2021-06-06 00:12:31,476 INFO L226 Difference]: Without dead ends: 3182 [2021-06-06 00:12:31,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2424.0ms TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:12:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-06 00:12:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2156. [2021-06-06 00:12:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.432018561484919) internal successors, (7396), 2155 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7396 transitions. [2021-06-06 00:12:31,504 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7396 transitions. Word has length 26 [2021-06-06 00:12:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:31,504 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7396 transitions. [2021-06-06 00:12:31,504 INFO L483 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) [2021-06-06 00:12:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7396 transitions. [2021-06-06 00:12:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:31,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:31,506 INFO L554 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] [2021-06-06 00:12:31,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3824,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:31,707 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 55 times [2021-06-06 00:12:31,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:31,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497117503] [2021-06-06 00:12:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:32,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497117503] [2021-06-06 00:12:32,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497117503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175390227] [2021-06-06 00:12:32,114 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:32,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:32,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:32,593 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:12:32,859 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-06 00:12:32,916 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_443, v_prenex_444], 2=[A, v_prenex_445]} [2021-06-06 00:12:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:32,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:12:32,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,036 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-06 00:12:33,037 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.3 percent of original size [2021-06-06 00:12:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:33,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-06 00:12:33,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:33,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:33,093 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 [2021-06-06 00:12:33,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:33,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:33,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:33,144 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:12:33,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:33,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:33,148 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 [2021-06-06 00:12:33,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:12:33,188 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:207, output treesize:51 [2021-06-06 00:12:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:33,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175390227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:33,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:33,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:33,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535904446] [2021-06-06 00:12:33,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:33,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:33,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:33,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:33,246 INFO L87 Difference]: Start difference. First operand 2156 states and 7396 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) [2021-06-06 00:12:34,102 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-06 00:12:34,525 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-06-06 00:12:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:34,645 INFO L93 Difference]: Finished difference Result 2279 states and 7717 transitions. [2021-06-06 00:12:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:12:34,645 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 [2021-06-06 00:12:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:34,649 INFO L225 Difference]: With dead ends: 2279 [2021-06-06 00:12:34,649 INFO L226 Difference]: Without dead ends: 2264 [2021-06-06 00:12:34,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2048.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:12:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-06 00:12:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2159. [2021-06-06 00:12:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 3.4300278035217793) internal successors, (7402), 2158 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 7402 transitions. [2021-06-06 00:12:34,674 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 7402 transitions. Word has length 26 [2021-06-06 00:12:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:34,674 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 7402 transitions. [2021-06-06 00:12:34,674 INFO L483 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) [2021-06-06 00:12:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 7402 transitions. [2021-06-06 00:12:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:34,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:34,677 INFO L554 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] [2021-06-06 00:12:34,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-06-06 00:12:34,877 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash 16138506, now seen corresponding path program 56 times [2021-06-06 00:12:34,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:34,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676090650] [2021-06-06 00:12:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:35,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676090650] [2021-06-06 00:12:35,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676090650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:35,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937508840] [2021-06-06 00:12:35,243 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:35,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:35,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:35,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:12:35,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:35,677 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:12:35,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:35,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:35,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:12:35,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:35,871 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:12:35,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:35,884 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:35,884 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 [2021-06-06 00:12:35,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:35,999 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-06 00:12:35,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:36,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,011 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 [2021-06-06 00:12:36,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:36,123 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-06 00:12:36,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:36,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:36,136 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 [2021-06-06 00:12:36,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:36,242 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:12:36,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:36,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,255 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 26 treesize of output 24 [2021-06-06 00:12:36,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:36,363 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:12:36,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:36,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,374 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 [2021-06-06 00:12:36,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:36,478 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:12:36,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:36,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,490 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 [2021-06-06 00:12:36,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:36,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:36,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,600 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 33 treesize of output 27 [2021-06-06 00:12:36,601 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:36,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:36,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:12:36,698 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-06 00:12:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:36,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937508840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:36,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:36,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:36,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960990930] [2021-06-06 00:12:36,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:36,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:36,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:36,893 INFO L87 Difference]: Start difference. First operand 2159 states and 7402 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) [2021-06-06 00:12:37,235 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-06 00:12:38,052 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-06 00:12:38,544 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-06 00:12:38,884 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-06 00:12:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:39,094 INFO L93 Difference]: Finished difference Result 3021 states and 10110 transitions. [2021-06-06 00:12:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:12:39,094 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 [2021-06-06 00:12:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:39,098 INFO L225 Difference]: With dead ends: 3021 [2021-06-06 00:12:39,098 INFO L226 Difference]: Without dead ends: 3006 [2021-06-06 00:12:39,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2536.7ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:12:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-06-06 00:12:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2153. [2021-06-06 00:12:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.427973977695167) internal successors, (7377), 2152 states have internal predecessors, (7377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7377 transitions. [2021-06-06 00:12:39,126 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7377 transitions. Word has length 26 [2021-06-06 00:12:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:39,126 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7377 transitions. [2021-06-06 00:12:39,126 INFO L483 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) [2021-06-06 00:12:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7377 transitions. [2021-06-06 00:12:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:39,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:39,128 INFO L554 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] [2021-06-06 00:12:39,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3850 [2021-06-06 00:12:39,330 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-06-06 00:12:39,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:39,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368358371] [2021-06-06 00:12:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:39,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368358371] [2021-06-06 00:12:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368358371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768866] [2021-06-06 00:12:39,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:39,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:12:39,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:12:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:40,175 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_469], 3=[v_prenex_467, v_prenex_468]} [2021-06-06 00:12:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:12:40,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,201 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 [2021-06-06 00:12:40,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,349 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-06 00:12:40,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,364 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:40,364 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 21 treesize of output 17 [2021-06-06 00:12:40,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,376 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 [2021-06-06 00:12:40,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,512 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-06 00:12:40,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,526 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 30 treesize of output 26 [2021-06-06 00:12:40,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,541 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:12:40,541 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 [2021-06-06 00:12:40,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,663 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:12:40,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,676 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:12:40,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:12:40,678 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:40,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,687 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 [2021-06-06 00:12:40,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:40,796 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-06 00:12:40,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:40,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:12:40,802 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:365, output treesize:194 [2021-06-06 00:12:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:40,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:40,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:40,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:40,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368247384] [2021-06-06 00:12:40,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:40,995 INFO L87 Difference]: Start difference. First operand 2153 states and 7377 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) [2021-06-06 00:12:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:42,233 INFO L93 Difference]: Finished difference Result 2848 states and 9544 transitions. [2021-06-06 00:12:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:12:42,233 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 [2021-06-06 00:12:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:42,237 INFO L225 Difference]: With dead ends: 2848 [2021-06-06 00:12:42,237 INFO L226 Difference]: Without dead ends: 2823 [2021-06-06 00:12:42,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1563.5ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:12:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-06-06 00:12:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2129. [2021-06-06 00:12:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-06-06 00:12:42,262 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-06-06 00:12:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:42,263 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-06-06 00:12:42,263 INFO L483 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) [2021-06-06 00:12:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-06-06 00:12:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:42,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:42,265 INFO L554 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] [2021-06-06 00:12:42,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3867,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:42,467 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-06 00:12:42,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:42,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002248503] [2021-06-06 00:12:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:42,788 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-06 00:12:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:42,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:42,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002248503] [2021-06-06 00:12:42,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002248503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:42,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792874999] [2021-06-06 00:12:42,897 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:42,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:42,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:42,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:43,268 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-06 00:12:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:12:43,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,401 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:43,402 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 [2021-06-06 00:12:43,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,538 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-06 00:12:43,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-06 00:12:43,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,564 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 [2021-06-06 00:12:43,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,691 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-06 00:12:43,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,705 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:43,705 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 [2021-06-06 00:12:43,707 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,716 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 [2021-06-06 00:12:43,720 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,833 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-06 00:12:43,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,846 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 [2021-06-06 00:12:43,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,859 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:43,859 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 [2021-06-06 00:12:43,860 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,963 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-06 00:12:43,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:12:43,969 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-06-06 00:12:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:44,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792874999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:44,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:44,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:44,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626209601] [2021-06-06 00:12:44,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:44,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:44,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:44,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:44,173 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 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) [2021-06-06 00:12:45,267 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-06 00:12:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:45,337 INFO L93 Difference]: Finished difference Result 2750 states and 9269 transitions. [2021-06-06 00:12:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:12:45,337 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 [2021-06-06 00:12:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:45,340 INFO L225 Difference]: With dead ends: 2750 [2021-06-06 00:12:45,340 INFO L226 Difference]: Without dead ends: 2735 [2021-06-06 00:12:45,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1525.1ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:12:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-06-06 00:12:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2129. [2021-06-06 00:12:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-06-06 00:12:45,367 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-06-06 00:12:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:45,367 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-06-06 00:12:45,367 INFO L483 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) [2021-06-06 00:12:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-06-06 00:12:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:45,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:45,382 INFO L554 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] [2021-06-06 00:12:45,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3900,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:45,582 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:45,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1496131378, now seen corresponding path program 63 times [2021-06-06 00:12:45,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:45,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168937210] [2021-06-06 00:12:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:45,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:45,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168937210] [2021-06-06 00:12:45,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168937210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:45,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267826096] [2021-06-06 00:12:45,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:45,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:12:45,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,512 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:12:46,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:46,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,544 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:12:46,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:46,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,573 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:12:46,573 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 [2021-06-06 00:12:46,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,599 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:12:46,599 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 [2021-06-06 00:12:46,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,626 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-06 00:12:46,626 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 28 [2021-06-06 00:12:46,627 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,652 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:12:46,652 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 [2021-06-06 00:12:46,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:46,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:46,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:46,712 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 [2021-06-06 00:12:46,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,735 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:46,735 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 [2021-06-06 00:12:46,736 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,753 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:46,753 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 1 [2021-06-06 00:12:46,754 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,771 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:46,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:46,772 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,788 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:12:46,789 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,805 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:46,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:46,806 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,831 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:12:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:46,835 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,850 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:46,850 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 [2021-06-06 00:12:46,850 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,859 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:46,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-06 00:12:46,860 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:47,015 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-06-06 00:12:47,015 INFO L628 ElimStorePlain]: treesize reduction 140, result has 39.9 percent of original size [2021-06-06 00:12:47,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:12:47,018 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-06-06 00:12:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267826096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:47,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:47,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:12:47,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250876640] [2021-06-06 00:12:47,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:12:47,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:12:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:12:47,122 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 transitions. Second operand has 20 states, 20 states have (on average 2.45) 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) [2021-06-06 00:12:48,802 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-06-06 00:12:49,532 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-06 00:12:49,825 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-06-06 00:12:50,035 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-06 00:12:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:50,134 INFO L93 Difference]: Finished difference Result 3313 states and 10903 transitions. [2021-06-06 00:12:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:12:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) 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 [2021-06-06 00:12:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:50,139 INFO L225 Difference]: With dead ends: 3313 [2021-06-06 00:12:50,139 INFO L226 Difference]: Without dead ends: 3269 [2021-06-06 00:12:50,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2990.4ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:12:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-06-06 00:12:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2147. [2021-06-06 00:12:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.4221808014911463) internal successors, (7344), 2146 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7344 transitions. [2021-06-06 00:12:50,173 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7344 transitions. Word has length 26 [2021-06-06 00:12:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:50,174 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7344 transitions. [2021-06-06 00:12:50,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) 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) [2021-06-06 00:12:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7344 transitions. [2021-06-06 00:12:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:50,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:50,176 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:50,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-06 00:12:50,376 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-06 00:12:50,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:50,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754201130] [2021-06-06 00:12:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:50,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:50,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754201130] [2021-06-06 00:12:50,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754201130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:50,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337952107] [2021-06-06 00:12:50,432 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:50,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:12:50,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:50,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337952107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:50,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:50,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:12:50,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423229311] [2021-06-06 00:12:50,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:50,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:50,560 INFO L87 Difference]: Start difference. First operand 2147 states and 7344 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-06 00:12:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:51,552 INFO L93 Difference]: Finished difference Result 5131 states and 15966 transitions. [2021-06-06 00:12:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:12:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-06-06 00:12:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:51,559 INFO L225 Difference]: With dead ends: 5131 [2021-06-06 00:12:51,559 INFO L226 Difference]: Without dead ends: 5131 [2021-06-06 00:12:51,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:12:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-06-06 00:12:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 2340. [2021-06-06 00:12:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 3.469431380932022) internal successors, (8115), 2339 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 8115 transitions. [2021-06-06 00:12:51,601 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 8115 transitions. Word has length 28 [2021-06-06 00:12:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:51,602 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 8115 transitions. [2021-06-06 00:12:51,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-06 00:12:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 8115 transitions. [2021-06-06 00:12:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:51,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:51,604 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:51,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4064,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:51,805 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-06 00:12:51,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:51,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183462194] [2021-06-06 00:12:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:51,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:51,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183462194] [2021-06-06 00:12:51,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183462194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:51,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266576613] [2021-06-06 00:12:51,847 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:51,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:12:51,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:51,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266576613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:51,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:51,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:12:51,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260644056] [2021-06-06 00:12:51,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:12:51,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:51,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:12:51,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:12:51,982 INFO L87 Difference]: Start difference. First operand 2340 states and 8115 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:53,238 INFO L93 Difference]: Finished difference Result 6763 states and 20717 transitions. [2021-06-06 00:12:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:12:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:53,247 INFO L225 Difference]: With dead ends: 6763 [2021-06-06 00:12:53,247 INFO L226 Difference]: Without dead ends: 6763 [2021-06-06 00:12:53,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:12:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-06-06 00:12:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 2351. [2021-06-06 00:12:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 3.4761702127659575) internal successors, (8169), 2350 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 8169 transitions. [2021-06-06 00:12:53,305 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 8169 transitions. Word has length 28 [2021-06-06 00:12:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:53,305 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 8169 transitions. [2021-06-06 00:12:53,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 8169 transitions. [2021-06-06 00:12:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:53,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:53,308 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:53,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-06 00:12:53,509 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-06 00:12:53,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:53,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79850587] [2021-06-06 00:12:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:53,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:53,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79850587] [2021-06-06 00:12:53,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79850587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:53,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450698853] [2021-06-06 00:12:53,553 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:53,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:53,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:53,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450698853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:53,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:53,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:12:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878946023] [2021-06-06 00:12:53,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:12:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:12:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:12:53,690 INFO L87 Difference]: Start difference. First operand 2351 states and 8169 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:54,891 INFO L93 Difference]: Finished difference Result 6150 states and 19231 transitions. [2021-06-06 00:12:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:12:54,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:54,900 INFO L225 Difference]: With dead ends: 6150 [2021-06-06 00:12:54,900 INFO L226 Difference]: Without dead ends: 6150 [2021-06-06 00:12:54,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:12:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2021-06-06 00:12:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 2299. [2021-06-06 00:12:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.4538729329852047) internal successors, (7937), 2298 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7937 transitions. [2021-06-06 00:12:54,948 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7937 transitions. Word has length 28 [2021-06-06 00:12:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:54,948 INFO L482 AbstractCegarLoop]: Abstraction has 2299 states and 7937 transitions. [2021-06-06 00:12:54,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7937 transitions. [2021-06-06 00:12:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:54,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:54,951 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:55,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-06 00:12:55,153 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:55,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:55,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-06 00:12:55,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:55,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123714016] [2021-06-06 00:12:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:55,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:55,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123714016] [2021-06-06 00:12:55,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123714016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:55,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585426816] [2021-06-06 00:12:55,210 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:55,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:55,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:55,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585426816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:55,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:55,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:12:55,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046495660] [2021-06-06 00:12:55,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:55,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:55,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:55,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:55,339 INFO L87 Difference]: Start difference. First operand 2299 states and 7937 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:56,458 INFO L93 Difference]: Finished difference Result 5206 states and 16106 transitions. [2021-06-06 00:12:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:12:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:56,467 INFO L225 Difference]: With dead ends: 5206 [2021-06-06 00:12:56,467 INFO L226 Difference]: Without dead ends: 5206 [2021-06-06 00:12:56,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 665.1ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:12:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-06-06 00:12:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 2309. [2021-06-06 00:12:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.450173310225303) internal successors, (7963), 2308 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7963 transitions. [2021-06-06 00:12:56,531 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7963 transitions. Word has length 28 [2021-06-06 00:12:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:56,532 INFO L482 AbstractCegarLoop]: Abstraction has 2309 states and 7963 transitions. [2021-06-06 00:12:56,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7963 transitions. [2021-06-06 00:12:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:56,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:56,535 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:56,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-06 00:12:56,747 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 64 times [2021-06-06 00:12:56,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:56,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564535523] [2021-06-06 00:12:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:56,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564535523] [2021-06-06 00:12:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564535523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294110924] [2021-06-06 00:12:56,797 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:56,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:56,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294110924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:56,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:56,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:12:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927668046] [2021-06-06 00:12:56,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:12:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:12:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:12:56,912 INFO L87 Difference]: Start difference. First operand 2309 states and 7963 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:12:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:57,462 INFO L93 Difference]: Finished difference Result 4633 states and 14522 transitions. [2021-06-06 00:12:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:12:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-06 00:12:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:57,469 INFO L225 Difference]: With dead ends: 4633 [2021-06-06 00:12:57,469 INFO L226 Difference]: Without dead ends: 4633 [2021-06-06 00:12:57,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:12:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-06-06 00:12:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 2379. [2021-06-06 00:12:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.433978132884777) internal successors, (8166), 2378 states have internal predecessors, (8166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8166 transitions. [2021-06-06 00:12:57,515 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8166 transitions. Word has length 28 [2021-06-06 00:12:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:57,515 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8166 transitions. [2021-06-06 00:12:57,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:12:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8166 transitions. [2021-06-06 00:12:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:57,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:57,518 INFO L554 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, 1, 1] [2021-06-06 00:12:57,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-06-06 00:12:57,718 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-06 00:12:57,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:57,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69641983] [2021-06-06 00:12:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:57,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:57,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69641983] [2021-06-06 00:12:57,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69641983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:57,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250763324] [2021-06-06 00:12:57,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:57,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:12:57,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:57,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:12:57,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:57,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250763324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:57,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:57,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:12:57,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417003061] [2021-06-06 00:12:57,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:12:57,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:12:57,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:12:57,837 INFO L87 Difference]: Start difference. First operand 2379 states and 8166 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:58,009 INFO L93 Difference]: Finished difference Result 3856 states and 12614 transitions. [2021-06-06 00:12:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:12:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:58,014 INFO L225 Difference]: With dead ends: 3856 [2021-06-06 00:12:58,014 INFO L226 Difference]: Without dead ends: 3832 [2021-06-06 00:12:58,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:12:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-06-06 00:12:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2739. [2021-06-06 00:12:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 3.50036523009496) internal successors, (9584), 2738 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 9584 transitions. [2021-06-06 00:12:58,076 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 9584 transitions. Word has length 28 [2021-06-06 00:12:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:58,076 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 9584 transitions. [2021-06-06 00:12:58,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 9584 transitions. [2021-06-06 00:12:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:58,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:58,079 INFO L554 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, 1, 1] [2021-06-06 00:12:58,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:58,279 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:58,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:58,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-06 00:12:58,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:58,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402140360] [2021-06-06 00:12:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:58,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:58,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402140360] [2021-06-06 00:12:58,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402140360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:58,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397566778] [2021-06-06 00:12:58,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:58,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:58,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:58,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397566778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:58,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:58,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:12:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577914051] [2021-06-06 00:12:58,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:58,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:58,426 INFO L87 Difference]: Start difference. First operand 2739 states and 9584 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:59,011 INFO L93 Difference]: Finished difference Result 4478 states and 14368 transitions. [2021-06-06 00:12:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:12:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:59,017 INFO L225 Difference]: With dead ends: 4478 [2021-06-06 00:12:59,017 INFO L226 Difference]: Without dead ends: 4431 [2021-06-06 00:12:59,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:12:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-06-06 00:12:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2904. [2021-06-06 00:12:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 3.5177402686875645) internal successors, (10212), 2903 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 10212 transitions. [2021-06-06 00:12:59,060 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 10212 transitions. Word has length 28 [2021-06-06 00:12:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:59,060 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 10212 transitions. [2021-06-06 00:12:59,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 10212 transitions. [2021-06-06 00:12:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:59,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:59,064 INFO L554 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, 1, 1] [2021-06-06 00:12:59,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-06 00:12:59,265 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-06 00:12:59,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:59,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274147075] [2021-06-06 00:12:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:59,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:59,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274147075] [2021-06-06 00:12:59,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274147075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:59,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599017858] [2021-06-06 00:12:59,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:59,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:12:59,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:59,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:59,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599017858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:59,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:59,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:12:59,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389196517] [2021-06-06 00:12:59,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:12:59,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:12:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:12:59,417 INFO L87 Difference]: Start difference. First operand 2904 states and 10212 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:00,098 INFO L93 Difference]: Finished difference Result 4785 states and 15055 transitions. [2021-06-06 00:13:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:13:00,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-06 00:13:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:00,104 INFO L225 Difference]: With dead ends: 4785 [2021-06-06 00:13:00,104 INFO L226 Difference]: Without dead ends: 4759 [2021-06-06 00:13:00,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:13:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-06-06 00:13:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2922. [2021-06-06 00:13:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.5217391304347827) internal successors, (10287), 2921 states have internal predecessors, (10287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10287 transitions. [2021-06-06 00:13:00,154 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10287 transitions. Word has length 28 [2021-06-06 00:13:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:00,155 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10287 transitions. [2021-06-06 00:13:00,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:00,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10287 transitions. [2021-06-06 00:13:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:00,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:00,158 INFO L554 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, 1, 1] [2021-06-06 00:13:00,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4071 [2021-06-06 00:13:00,373 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:00,373 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-06 00:13:00,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:00,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388986542] [2021-06-06 00:13:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:00,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:00,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388986542] [2021-06-06 00:13:00,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388986542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:00,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559741026] [2021-06-06 00:13:00,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:00,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:00,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559741026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:00,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:00,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:00,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349570783] [2021-06-06 00:13:00,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:00,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:00,526 INFO L87 Difference]: Start difference. First operand 2922 states and 10287 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:01,228 INFO L93 Difference]: Finished difference Result 4783 states and 15074 transitions. [2021-06-06 00:13:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:13:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-06 00:13:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:01,234 INFO L225 Difference]: With dead ends: 4783 [2021-06-06 00:13:01,234 INFO L226 Difference]: Without dead ends: 4771 [2021-06-06 00:13:01,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:13:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2021-06-06 00:13:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2922. [2021-06-06 00:13:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.515576857240671) internal successors, (10269), 2921 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10269 transitions. [2021-06-06 00:13:01,282 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10269 transitions. Word has length 28 [2021-06-06 00:13:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:01,282 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10269 transitions. [2021-06-06 00:13:01,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10269 transitions. [2021-06-06 00:13:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:01,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:01,286 INFO L554 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, 1, 1] [2021-06-06 00:13:01,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:01,486 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-06 00:13:01,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:01,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112242352] [2021-06-06 00:13:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:01,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:01,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112242352] [2021-06-06 00:13:01,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112242352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:01,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695434507] [2021-06-06 00:13:01,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:01,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695434507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:01,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:01,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:01,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677795186] [2021-06-06 00:13:01,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:01,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:01,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:01,613 INFO L87 Difference]: Start difference. First operand 2922 states and 10269 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:02,132 INFO L93 Difference]: Finished difference Result 5554 states and 17878 transitions. [2021-06-06 00:13:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:13:02,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:02,140 INFO L225 Difference]: With dead ends: 5554 [2021-06-06 00:13:02,140 INFO L226 Difference]: Without dead ends: 5507 [2021-06-06 00:13:02,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:13:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-06 00:13:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3068. [2021-06-06 00:13:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.5598304532116076) internal successors, (10918), 3067 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10918 transitions. [2021-06-06 00:13:02,217 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10918 transitions. Word has length 28 [2021-06-06 00:13:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:02,217 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10918 transitions. [2021-06-06 00:13:02,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10918 transitions. [2021-06-06 00:13:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:02,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:02,220 INFO L554 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, 1, 1] [2021-06-06 00:13:02,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-06-06 00:13:02,421 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-06 00:13:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104852583] [2021-06-06 00:13:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:02,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:02,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104852583] [2021-06-06 00:13:02,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104852583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:02,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973121738] [2021-06-06 00:13:02,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:02,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:02,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:13:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:02,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973121738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:02,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:02,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:13:02,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586016889] [2021-06-06 00:13:02,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:13:02,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:02,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:13:02,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:13:02,529 INFO L87 Difference]: Start difference. First operand 3068 states and 10918 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-06 00:13:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:02,725 INFO L93 Difference]: Finished difference Result 4356 states and 14401 transitions. [2021-06-06 00:13:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:13:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-06-06 00:13:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:02,731 INFO L225 Difference]: With dead ends: 4356 [2021-06-06 00:13:02,731 INFO L226 Difference]: Without dead ends: 4356 [2021-06-06 00:13:02,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:13:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-06 00:13:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 2879. [2021-06-06 00:13:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.5295343988881167) internal successors, (10158), 2878 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10158 transitions. [2021-06-06 00:13:02,771 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10158 transitions. Word has length 28 [2021-06-06 00:13:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:02,771 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10158 transitions. [2021-06-06 00:13:02,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-06 00:13:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10158 transitions. [2021-06-06 00:13:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:02,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:02,774 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:02,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-06-06 00:13:02,975 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-06 00:13:02,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:02,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878796793] [2021-06-06 00:13:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:03,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878796793] [2021-06-06 00:13:03,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878796793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611552164] [2021-06-06 00:13:03,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:03,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:03,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:03,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:03,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:03,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611552164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:03,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:03,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:03,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300439829] [2021-06-06 00:13:03,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:03,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:03,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:03,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:03,112 INFO L87 Difference]: Start difference. First operand 2879 states and 10158 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:13:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:03,819 INFO L93 Difference]: Finished difference Result 6267 states and 19847 transitions. [2021-06-06 00:13:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:13:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-06 00:13:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:03,829 INFO L225 Difference]: With dead ends: 6267 [2021-06-06 00:13:03,829 INFO L226 Difference]: Without dead ends: 6267 [2021-06-06 00:13:03,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:13:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-06-06 00:13:03,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 2897. [2021-06-06 00:13:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.5293508287292816) internal successors, (10221), 2896 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 10221 transitions. [2021-06-06 00:13:03,901 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 10221 transitions. Word has length 28 [2021-06-06 00:13:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:03,901 INFO L482 AbstractCegarLoop]: Abstraction has 2897 states and 10221 transitions. [2021-06-06 00:13:03,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:13:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 10221 transitions. [2021-06-06 00:13:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:03,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:03,905 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:04,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-06-06 00:13:04,105 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-06 00:13:04,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:04,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734616142] [2021-06-06 00:13:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:04,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734616142] [2021-06-06 00:13:04,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734616142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298462144] [2021-06-06 00:13:04,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:04,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:04,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:04,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298462144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:04,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:04,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:04,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911849556] [2021-06-06 00:13:04,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:04,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:04,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:04,251 INFO L87 Difference]: Start difference. First operand 2897 states and 10221 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:13:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:05,041 INFO L93 Difference]: Finished difference Result 6510 states and 20600 transitions. [2021-06-06 00:13:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:13:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-06 00:13:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:05,050 INFO L225 Difference]: With dead ends: 6510 [2021-06-06 00:13:05,050 INFO L226 Difference]: Without dead ends: 6510 [2021-06-06 00:13:05,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:13:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-06-06 00:13:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 2991. [2021-06-06 00:13:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5210702341137123) internal successors, (10528), 2990 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10528 transitions. [2021-06-06 00:13:05,112 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10528 transitions. Word has length 28 [2021-06-06 00:13:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:05,112 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10528 transitions. [2021-06-06 00:13:05,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:13:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10528 transitions. [2021-06-06 00:13:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:05,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:05,116 INFO L554 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, 1, 1] [2021-06-06 00:13:05,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4076,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:05,316 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-06 00:13:05,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:05,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643040444] [2021-06-06 00:13:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:05,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643040444] [2021-06-06 00:13:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643040444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642231856] [2021-06-06 00:13:05,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:05,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:13:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:05,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:05,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642231856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:05,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:05,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:05,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623627222] [2021-06-06 00:13:05,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:05,462 INFO L87 Difference]: Start difference. First operand 2991 states and 10528 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:06,065 INFO L93 Difference]: Finished difference Result 6652 states and 21097 transitions. [2021-06-06 00:13:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:13:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:06,075 INFO L225 Difference]: With dead ends: 6652 [2021-06-06 00:13:06,075 INFO L226 Difference]: Without dead ends: 6616 [2021-06-06 00:13:06,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:13:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-06-06 00:13:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 3393. [2021-06-06 00:13:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.5474646226415096) internal successors, (12033), 3392 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12033 transitions. [2021-06-06 00:13:06,147 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12033 transitions. Word has length 28 [2021-06-06 00:13:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:06,147 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12033 transitions. [2021-06-06 00:13:06,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12033 transitions. [2021-06-06 00:13:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:06,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:06,151 INFO L554 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, 1, 1] [2021-06-06 00:13:06,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-06-06 00:13:06,352 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:06,352 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-06 00:13:06,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:06,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778845454] [2021-06-06 00:13:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:06,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:06,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778845454] [2021-06-06 00:13:06,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778845454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:06,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331024436] [2021-06-06 00:13:06,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:06,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:13:06,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:06,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331024436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:06,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:06,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:06,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643911548] [2021-06-06 00:13:06,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:06,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:06,500 INFO L87 Difference]: Start difference. First operand 3393 states and 12033 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:07,096 INFO L93 Difference]: Finished difference Result 6827 states and 21583 transitions. [2021-06-06 00:13:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:13:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:07,105 INFO L225 Difference]: With dead ends: 6827 [2021-06-06 00:13:07,105 INFO L226 Difference]: Without dead ends: 6827 [2021-06-06 00:13:07,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:13:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2021-06-06 00:13:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 3104. [2021-06-06 00:13:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 3.5078955849178213) internal successors, (10885), 3103 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 10885 transitions. [2021-06-06 00:13:07,171 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 10885 transitions. Word has length 28 [2021-06-06 00:13:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:07,171 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 10885 transitions. [2021-06-06 00:13:07,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 10885 transitions. [2021-06-06 00:13:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:07,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:07,175 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:07,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-06-06 00:13:07,375 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-06 00:13:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:07,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658541775] [2021-06-06 00:13:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:07,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658541775] [2021-06-06 00:13:07,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658541775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188713691] [2021-06-06 00:13:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:07,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188713691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:07,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:07,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14278509] [2021-06-06 00:13:07,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:07,503 INFO L87 Difference]: Start difference. First operand 3104 states and 10885 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:13:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:08,189 INFO L93 Difference]: Finished difference Result 5999 states and 19332 transitions. [2021-06-06 00:13:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:13:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-06 00:13:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:08,197 INFO L225 Difference]: With dead ends: 5999 [2021-06-06 00:13:08,198 INFO L226 Difference]: Without dead ends: 5995 [2021-06-06 00:13:08,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:13:08,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-06-06 00:13:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 2864. [2021-06-06 00:13:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2863 states have (on average 3.5337059028990567) internal successors, (10117), 2863 states have internal predecessors, (10117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10117 transitions. [2021-06-06 00:13:08,252 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10117 transitions. Word has length 28 [2021-06-06 00:13:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:08,252 INFO L482 AbstractCegarLoop]: Abstraction has 2864 states and 10117 transitions. [2021-06-06 00:13:08,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:13:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10117 transitions. [2021-06-06 00:13:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:08,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:08,255 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:08,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-06 00:13:08,455 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-06 00:13:08,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:08,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755851247] [2021-06-06 00:13:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:08,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:08,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755851247] [2021-06-06 00:13:08,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755851247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:08,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241476333] [2021-06-06 00:13:08,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:08,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:08,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:08,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241476333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:08,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:08,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:08,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073300871] [2021-06-06 00:13:08,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:08,630 INFO L87 Difference]: Start difference. First operand 2864 states and 10117 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:09,644 INFO L93 Difference]: Finished difference Result 9242 states and 30126 transitions. [2021-06-06 00:13:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:13:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:09,658 INFO L225 Difference]: With dead ends: 9242 [2021-06-06 00:13:09,659 INFO L226 Difference]: Without dead ends: 9242 [2021-06-06 00:13:09,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 598.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:13:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-06-06 00:13:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 3043. [2021-06-06 00:13:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.6058514135437214) internal successors, (10969), 3042 states have internal predecessors, (10969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10969 transitions. [2021-06-06 00:13:09,749 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10969 transitions. Word has length 28 [2021-06-06 00:13:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:09,749 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 10969 transitions. [2021-06-06 00:13:09,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10969 transitions. [2021-06-06 00:13:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:09,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:09,753 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:09,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:09,953 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:09,954 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-06 00:13:09,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:09,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376009834] [2021-06-06 00:13:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:09,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:09,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376009834] [2021-06-06 00:13:09,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376009834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:09,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308860980] [2021-06-06 00:13:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:10,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:13:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:10,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308860980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:10,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:10,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:10,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124858965] [2021-06-06 00:13:10,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:10,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:10,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:10,108 INFO L87 Difference]: Start difference. First operand 3043 states and 10969 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:11,106 INFO L93 Difference]: Finished difference Result 9069 states and 29656 transitions. [2021-06-06 00:13:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:13:11,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:11,120 INFO L225 Difference]: With dead ends: 9069 [2021-06-06 00:13:11,120 INFO L226 Difference]: Without dead ends: 9069 [2021-06-06 00:13:11,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:13:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9069 states. [2021-06-06 00:13:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9069 to 3012. [2021-06-06 00:13:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 3.5888409166389903) internal successors, (10806), 3011 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 10806 transitions. [2021-06-06 00:13:11,201 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 10806 transitions. Word has length 28 [2021-06-06 00:13:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:11,201 INFO L482 AbstractCegarLoop]: Abstraction has 3012 states and 10806 transitions. [2021-06-06 00:13:11,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 10806 transitions. [2021-06-06 00:13:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:11,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:11,204 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:11,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:11,405 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:11,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:11,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-06 00:13:11,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:11,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795365391] [2021-06-06 00:13:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:11,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:11,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795365391] [2021-06-06 00:13:11,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795365391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:11,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744250842] [2021-06-06 00:13:11,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:11,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:11,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:11,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:11,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744250842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:11,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:11,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:13:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999534298] [2021-06-06 00:13:11,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:11,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:11,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:11,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:11,552 INFO L87 Difference]: Start difference. First operand 3012 states and 10806 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:12,467 INFO L93 Difference]: Finished difference Result 8513 states and 26929 transitions. [2021-06-06 00:13:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:13:12,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-06 00:13:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:12,480 INFO L225 Difference]: With dead ends: 8513 [2021-06-06 00:13:12,480 INFO L226 Difference]: Without dead ends: 8513 [2021-06-06 00:13:12,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 510.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:13:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2021-06-06 00:13:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 3032. [2021-06-06 00:13:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.5922137908281093) internal successors, (10888), 3031 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10888 transitions. [2021-06-06 00:13:12,555 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10888 transitions. Word has length 28 [2021-06-06 00:13:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:12,555 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 10888 transitions. [2021-06-06 00:13:12,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10888 transitions. [2021-06-06 00:13:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:12,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:12,558 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:12,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4082,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:12,759 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-06 00:13:12,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:12,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249787055] [2021-06-06 00:13:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:12,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:12,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249787055] [2021-06-06 00:13:12,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249787055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:12,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053056158] [2021-06-06 00:13:12,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:12,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:13:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:12,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:12,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053056158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:12,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:12,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:13:12,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866682323] [2021-06-06 00:13:12,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:12,897 INFO L87 Difference]: Start difference. First operand 3032 states and 10888 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:13,774 INFO L93 Difference]: Finished difference Result 8020 states and 25736 transitions. [2021-06-06 00:13:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:13:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-06 00:13:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:13,786 INFO L225 Difference]: With dead ends: 8020 [2021-06-06 00:13:13,786 INFO L226 Difference]: Without dead ends: 8012 [2021-06-06 00:13:13,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:13:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-06-06 00:13:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3014. [2021-06-06 00:13:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5881181546631264) internal successors, (10811), 3013 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10811 transitions. [2021-06-06 00:13:13,853 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10811 transitions. Word has length 28 [2021-06-06 00:13:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:13,853 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10811 transitions. [2021-06-06 00:13:13,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10811 transitions. [2021-06-06 00:13:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:13,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:13,856 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:14,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-06-06 00:13:14,057 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:14,057 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-06 00:13:14,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:14,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41867007] [2021-06-06 00:13:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41867007] [2021-06-06 00:13:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41867007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:14,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962359294] [2021-06-06 00:13:14,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:14,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:13:14,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:14,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:14,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962359294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:14,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:14,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:14,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848327202] [2021-06-06 00:13:14,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:14,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:14,211 INFO L87 Difference]: Start difference. First operand 3014 states and 10811 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:15,163 INFO L93 Difference]: Finished difference Result 7945 states and 25505 transitions. [2021-06-06 00:13:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:13:15,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-06 00:13:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:15,175 INFO L225 Difference]: With dead ends: 7945 [2021-06-06 00:13:15,175 INFO L226 Difference]: Without dead ends: 7945 [2021-06-06 00:13:15,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:13:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-06 00:13:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3030. [2021-06-06 00:13:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.5902938263453286) internal successors, (10875), 3029 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 10875 transitions. [2021-06-06 00:13:15,243 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 10875 transitions. Word has length 28 [2021-06-06 00:13:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:15,243 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 10875 transitions. [2021-06-06 00:13:15,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 10875 transitions. [2021-06-06 00:13:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:15,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:15,247 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:15,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-06-06 00:13:15,448 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:15,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-06 00:13:15,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:15,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232644797] [2021-06-06 00:13:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:15,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232644797] [2021-06-06 00:13:15,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232644797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270420429] [2021-06-06 00:13:15,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270420429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:15,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:15,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:15,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430185049] [2021-06-06 00:13:15,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:15,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:15,597 INFO L87 Difference]: Start difference. First operand 3030 states and 10875 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:16,516 INFO L93 Difference]: Finished difference Result 7613 states and 24721 transitions. [2021-06-06 00:13:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:13:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-06 00:13:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:16,527 INFO L225 Difference]: With dead ends: 7613 [2021-06-06 00:13:16,528 INFO L226 Difference]: Without dead ends: 7605 [2021-06-06 00:13:16,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:13:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2021-06-06 00:13:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 2787. [2021-06-06 00:13:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 3.5078966259870783) internal successors, (9773), 2786 states have internal predecessors, (9773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 9773 transitions. [2021-06-06 00:13:16,609 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 9773 transitions. Word has length 28 [2021-06-06 00:13:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:16,609 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 9773 transitions. [2021-06-06 00:13:16,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:13:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 9773 transitions. [2021-06-06 00:13:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:16,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:16,612 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:16,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:16,817 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-06 00:13:16,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:16,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31240838] [2021-06-06 00:13:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:16,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:16,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31240838] [2021-06-06 00:13:16,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31240838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:16,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375967683] [2021-06-06 00:13:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:16,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:16,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:16,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375967683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:16,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:16,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:13:16,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501643856] [2021-06-06 00:13:16,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:16,977 INFO L87 Difference]: Start difference. First operand 2787 states and 9773 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:17,834 INFO L93 Difference]: Finished difference Result 5810 states and 18592 transitions. [2021-06-06 00:13:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:13:17,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:13:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:17,842 INFO L225 Difference]: With dead ends: 5810 [2021-06-06 00:13:17,843 INFO L226 Difference]: Without dead ends: 5810 [2021-06-06 00:13:17,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:13:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-06-06 00:13:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 2799. [2021-06-06 00:13:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 3.506433166547534) internal successors, (9811), 2798 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 9811 transitions. [2021-06-06 00:13:17,895 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 9811 transitions. Word has length 28 [2021-06-06 00:13:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:17,895 INFO L482 AbstractCegarLoop]: Abstraction has 2799 states and 9811 transitions. [2021-06-06 00:13:17,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 9811 transitions. [2021-06-06 00:13:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:17,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:17,898 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:18,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-06-06 00:13:18,099 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-06 00:13:18,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:18,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461298418] [2021-06-06 00:13:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:18,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:18,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461298418] [2021-06-06 00:13:18,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461298418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:18,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262155307] [2021-06-06 00:13:18,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:18,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:18,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262155307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:18,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:18,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:18,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71044631] [2021-06-06 00:13:18,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:18,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:18,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:18,291 INFO L87 Difference]: Start difference. First operand 2799 states and 9811 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) [2021-06-06 00:13:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:19,407 INFO L93 Difference]: Finished difference Result 6586 states and 20579 transitions. [2021-06-06 00:13:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:13:19,407 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 28 [2021-06-06 00:13:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:19,416 INFO L225 Difference]: With dead ends: 6586 [2021-06-06 00:13:19,417 INFO L226 Difference]: Without dead ends: 6586 [2021-06-06 00:13:19,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:13:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2021-06-06 00:13:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 2865. [2021-06-06 00:13:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 3.5013966480446927) internal successors, (10028), 2864 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 10028 transitions. [2021-06-06 00:13:19,478 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 10028 transitions. Word has length 28 [2021-06-06 00:13:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:19,478 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 10028 transitions. [2021-06-06 00:13:19,478 INFO L483 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) [2021-06-06 00:13:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 10028 transitions. [2021-06-06 00:13:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:19,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:19,482 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:19,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-06-06 00:13:19,682 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-06 00:13:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702806015] [2021-06-06 00:13:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:19,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702806015] [2021-06-06 00:13:19,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702806015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658204371] [2021-06-06 00:13:19,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:19,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:19,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:19,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658204371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:19,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:19,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:19,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780765789] [2021-06-06 00:13:19,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:19,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:19,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:19,842 INFO L87 Difference]: Start difference. First operand 2865 states and 10028 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) [2021-06-06 00:13:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:20,851 INFO L93 Difference]: Finished difference Result 6152 states and 19441 transitions. [2021-06-06 00:13:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:13:20,851 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 28 [2021-06-06 00:13:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:20,859 INFO L225 Difference]: With dead ends: 6152 [2021-06-06 00:13:20,859 INFO L226 Difference]: Without dead ends: 6148 [2021-06-06 00:13:20,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:13:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-06-06 00:13:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 2791. [2021-06-06 00:13:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.4974910394265235) internal successors, (9758), 2790 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9758 transitions. [2021-06-06 00:13:20,916 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9758 transitions. Word has length 28 [2021-06-06 00:13:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:20,916 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9758 transitions. [2021-06-06 00:13:20,916 INFO L483 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) [2021-06-06 00:13:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9758 transitions. [2021-06-06 00:13:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:20,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:20,919 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:21,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-06-06 00:13:21,120 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 65 times [2021-06-06 00:13:21,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:21,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041280573] [2021-06-06 00:13:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:21,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041280573] [2021-06-06 00:13:21,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041280573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197025953] [2021-06-06 00:13:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:21,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:13:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:21,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197025953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:21,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:21,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:21,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73810062] [2021-06-06 00:13:21,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:21,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:21,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:21,270 INFO L87 Difference]: Start difference. First operand 2791 states and 9758 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:21,823 INFO L93 Difference]: Finished difference Result 5291 states and 17008 transitions. [2021-06-06 00:13:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:13:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:21,830 INFO L225 Difference]: With dead ends: 5291 [2021-06-06 00:13:21,830 INFO L226 Difference]: Without dead ends: 5291 [2021-06-06 00:13:21,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:13:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-06-06 00:13:21,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 2791. [2021-06-06 00:13:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.499641577060932) internal successors, (9764), 2790 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9764 transitions. [2021-06-06 00:13:21,877 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9764 transitions. Word has length 28 [2021-06-06 00:13:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:21,877 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9764 transitions. [2021-06-06 00:13:21,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9764 transitions. [2021-06-06 00:13:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:21,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:21,880 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:22,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-06 00:13:22,081 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 66 times [2021-06-06 00:13:22,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:22,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211893175] [2021-06-06 00:13:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:22,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211893175] [2021-06-06 00:13:22,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211893175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229774966] [2021-06-06 00:13:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:22,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:22,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:22,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:22,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229774966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:22,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:22,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:22,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17391244] [2021-06-06 00:13:22,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:22,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:22,226 INFO L87 Difference]: Start difference. First operand 2791 states and 9764 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:22,958 INFO L93 Difference]: Finished difference Result 5642 states and 18000 transitions. [2021-06-06 00:13:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:13:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:22,969 INFO L225 Difference]: With dead ends: 5642 [2021-06-06 00:13:22,969 INFO L226 Difference]: Without dead ends: 5642 [2021-06-06 00:13:22,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:13:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-06-06 00:13:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 2782. [2021-06-06 00:13:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 3.4998202085580727) internal successors, (9733), 2781 states have internal predecessors, (9733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 9733 transitions. [2021-06-06 00:13:23,026 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 9733 transitions. Word has length 28 [2021-06-06 00:13:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:23,026 INFO L482 AbstractCegarLoop]: Abstraction has 2782 states and 9733 transitions. [2021-06-06 00:13:23,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 9733 transitions. [2021-06-06 00:13:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:23,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:23,029 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:23,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:23,230 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 67 times [2021-06-06 00:13:23,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:23,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337557657] [2021-06-06 00:13:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:23,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:23,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337557657] [2021-06-06 00:13:23,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337557657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:23,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993801455] [2021-06-06 00:13:23,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:23,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993801455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:23,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:23,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:23,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130002201] [2021-06-06 00:13:23,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:23,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:23,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:23,376 INFO L87 Difference]: Start difference. First operand 2782 states and 9733 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:24,252 INFO L93 Difference]: Finished difference Result 6106 states and 19261 transitions. [2021-06-06 00:13:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:13:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:24,261 INFO L225 Difference]: With dead ends: 6106 [2021-06-06 00:13:24,261 INFO L226 Difference]: Without dead ends: 6106 [2021-06-06 00:13:24,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:13:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-06 00:13:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 2844. [2021-06-06 00:13:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2843 states have (on average 3.4956032360182907) internal successors, (9938), 2843 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 9938 transitions. [2021-06-06 00:13:24,335 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 9938 transitions. Word has length 28 [2021-06-06 00:13:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:24,336 INFO L482 AbstractCegarLoop]: Abstraction has 2844 states and 9938 transitions. [2021-06-06 00:13:24,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 9938 transitions. [2021-06-06 00:13:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:24,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:24,339 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:24,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4091 [2021-06-06 00:13:24,539 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 68 times [2021-06-06 00:13:24,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:24,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929204468] [2021-06-06 00:13:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:24,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:24,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929204468] [2021-06-06 00:13:24,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929204468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:24,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005127697] [2021-06-06 00:13:24,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:24,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:24,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:24,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:24,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005127697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:24,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:24,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:13:24,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325678215] [2021-06-06 00:13:24,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:24,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:24,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:24,689 INFO L87 Difference]: Start difference. First operand 2844 states and 9938 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:25,216 INFO L93 Difference]: Finished difference Result 6899 states and 23235 transitions. [2021-06-06 00:13:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:13:25,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:25,227 INFO L225 Difference]: With dead ends: 6899 [2021-06-06 00:13:25,227 INFO L226 Difference]: Without dead ends: 6899 [2021-06-06 00:13:25,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:13:25,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-06 00:13:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4080. [2021-06-06 00:13:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 3.613875949987742) internal successors, (14741), 4079 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 14741 transitions. [2021-06-06 00:13:25,304 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 14741 transitions. Word has length 28 [2021-06-06 00:13:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:25,304 INFO L482 AbstractCegarLoop]: Abstraction has 4080 states and 14741 transitions. [2021-06-06 00:13:25,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 14741 transitions. [2021-06-06 00:13:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:25,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:25,309 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:25,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:25,509 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 69 times [2021-06-06 00:13:25,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:25,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184725973] [2021-06-06 00:13:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:25,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:25,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184725973] [2021-06-06 00:13:25,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184725973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:25,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139335509] [2021-06-06 00:13:25,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:25,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:13:25,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:25,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:25,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:25,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139335509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:25,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:25,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:25,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031086019] [2021-06-06 00:13:25,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:25,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:25,646 INFO L87 Difference]: Start difference. First operand 4080 states and 14741 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:26,429 INFO L93 Difference]: Finished difference Result 7418 states and 25100 transitions. [2021-06-06 00:13:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:13:26,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:26,441 INFO L225 Difference]: With dead ends: 7418 [2021-06-06 00:13:26,441 INFO L226 Difference]: Without dead ends: 7414 [2021-06-06 00:13:26,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 470.9ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:13:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2021-06-06 00:13:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 3968. [2021-06-06 00:13:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.623140912528359) internal successors, (14373), 3967 states have internal predecessors, (14373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14373 transitions. [2021-06-06 00:13:26,523 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14373 transitions. Word has length 28 [2021-06-06 00:13:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:26,523 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 14373 transitions. [2021-06-06 00:13:26,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14373 transitions. [2021-06-06 00:13:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:26,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:26,528 INFO L554 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, 1, 1] [2021-06-06 00:13:26,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4093 [2021-06-06 00:13:26,729 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-06 00:13:26,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:26,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222178312] [2021-06-06 00:13:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:26,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:26,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222178312] [2021-06-06 00:13:26,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222178312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:26,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858397656] [2021-06-06 00:13:26,757 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:26,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:13:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:26,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:26,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858397656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:26,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:26,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:13:26,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366784968] [2021-06-06 00:13:26,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:26,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:26,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:26,865 INFO L87 Difference]: Start difference. First operand 3968 states and 14373 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:27,697 INFO L93 Difference]: Finished difference Result 8219 states and 27545 transitions. [2021-06-06 00:13:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:13:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:27,709 INFO L225 Difference]: With dead ends: 8219 [2021-06-06 00:13:27,709 INFO L226 Difference]: Without dead ends: 8207 [2021-06-06 00:13:27,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:13:27,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8207 states. [2021-06-06 00:13:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8207 to 4409. [2021-06-06 00:13:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 3.713475499092559) internal successors, (16369), 4408 states have internal predecessors, (16369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 16369 transitions. [2021-06-06 00:13:27,797 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 16369 transitions. Word has length 28 [2021-06-06 00:13:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:27,797 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 16369 transitions. [2021-06-06 00:13:27,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 16369 transitions. [2021-06-06 00:13:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:27,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:27,802 INFO L554 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, 1, 1] [2021-06-06 00:13:28,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4094,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:28,003 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:28,003 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-06 00:13:28,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:28,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356027875] [2021-06-06 00:13:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:28,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356027875] [2021-06-06 00:13:28,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356027875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812172998] [2021-06-06 00:13:28,031 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:28,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:13:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:28,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:28,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812172998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:28,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:28,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:13:28,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544105675] [2021-06-06 00:13:28,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:28,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:28,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:28,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:28,168 INFO L87 Difference]: Start difference. First operand 4409 states and 16369 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:28,982 INFO L93 Difference]: Finished difference Result 8511 states and 28462 transitions. [2021-06-06 00:13:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:13:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:28,994 INFO L225 Difference]: With dead ends: 8511 [2021-06-06 00:13:28,995 INFO L226 Difference]: Without dead ends: 8511 [2021-06-06 00:13:28,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:13:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-06-06 00:13:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4429. [2021-06-06 00:13:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 3.7007678410117433) internal successors, (16387), 4428 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 16387 transitions. [2021-06-06 00:13:29,084 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 16387 transitions. Word has length 28 [2021-06-06 00:13:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:29,085 INFO L482 AbstractCegarLoop]: Abstraction has 4429 states and 16387 transitions. [2021-06-06 00:13:29,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 16387 transitions. [2021-06-06 00:13:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:29,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:29,090 INFO L554 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, 1, 1] [2021-06-06 00:13:29,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4095,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:29,291 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-06 00:13:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:29,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640907541] [2021-06-06 00:13:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:29,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:29,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640907541] [2021-06-06 00:13:29,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640907541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:29,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149075571] [2021-06-06 00:13:29,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:29,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:29,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149075571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:29,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:29,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:29,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852798937] [2021-06-06 00:13:29,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:29,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:29,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:29,409 INFO L87 Difference]: Start difference. First operand 4429 states and 16387 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) [2021-06-06 00:13:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:29,845 INFO L93 Difference]: Finished difference Result 7882 states and 27809 transitions. [2021-06-06 00:13:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:13:29,846 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 28 [2021-06-06 00:13:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:29,857 INFO L225 Difference]: With dead ends: 7882 [2021-06-06 00:13:29,857 INFO L226 Difference]: Without dead ends: 7799 [2021-06-06 00:13:29,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:13:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2021-06-06 00:13:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 5872. [2021-06-06 00:13:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5871 states have (on average 3.7629024016351558) internal successors, (22092), 5871 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 22092 transitions. [2021-06-06 00:13:29,981 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 22092 transitions. Word has length 28 [2021-06-06 00:13:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:29,981 INFO L482 AbstractCegarLoop]: Abstraction has 5872 states and 22092 transitions. [2021-06-06 00:13:29,981 INFO L483 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) [2021-06-06 00:13:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 22092 transitions. [2021-06-06 00:13:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:29,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:29,990 INFO L554 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, 1, 1] [2021-06-06 00:13:30,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-06 00:13:30,190 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-06 00:13:30,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:30,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102817849] [2021-06-06 00:13:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:30,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:30,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102817849] [2021-06-06 00:13:30,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102817849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:30,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908357430] [2021-06-06 00:13:30,217 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:30,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:30,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:13:30,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:30,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908357430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:30,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:30,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:13:30,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375203341] [2021-06-06 00:13:30,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:13:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:13:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:13:30,309 INFO L87 Difference]: Start difference. First operand 5872 states and 22092 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-06 00:13:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:30,486 INFO L93 Difference]: Finished difference Result 8160 states and 28714 transitions. [2021-06-06 00:13:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:13:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-06 00:13:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:30,498 INFO L225 Difference]: With dead ends: 8160 [2021-06-06 00:13:30,498 INFO L226 Difference]: Without dead ends: 8160 [2021-06-06 00:13:30,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:13:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-06-06 00:13:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 6012. [2021-06-06 00:13:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 3.7394776243553487) internal successors, (22478), 6011 states have internal predecessors, (22478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 22478 transitions. [2021-06-06 00:13:30,596 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 22478 transitions. Word has length 28 [2021-06-06 00:13:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:30,596 INFO L482 AbstractCegarLoop]: Abstraction has 6012 states and 22478 transitions. [2021-06-06 00:13:30,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-06 00:13:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 22478 transitions. [2021-06-06 00:13:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:30,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:30,604 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:30,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:30,804 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-06 00:13:30,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:30,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449668142] [2021-06-06 00:13:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:30,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:30,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449668142] [2021-06-06 00:13:30,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449668142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:30,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124922803] [2021-06-06 00:13:30,847 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:30,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:30,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:30,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:30,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:30,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124922803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:30,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:30,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:13:30,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585830987] [2021-06-06 00:13:30,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:30,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:30,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:30,937 INFO L87 Difference]: Start difference. First operand 6012 states and 22478 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) [2021-06-06 00:13:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:31,670 INFO L93 Difference]: Finished difference Result 12545 states and 43647 transitions. [2021-06-06 00:13:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:13:31,670 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 28 [2021-06-06 00:13:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:31,693 INFO L225 Difference]: With dead ends: 12545 [2021-06-06 00:13:31,693 INFO L226 Difference]: Without dead ends: 12545 [2021-06-06 00:13:31,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:13:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12545 states. [2021-06-06 00:13:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12545 to 6665. [2021-06-06 00:13:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.7554021608643455) internal successors, (25026), 6664 states have internal predecessors, (25026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 25026 transitions. [2021-06-06 00:13:31,874 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 25026 transitions. Word has length 28 [2021-06-06 00:13:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:31,875 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 25026 transitions. [2021-06-06 00:13:31,875 INFO L483 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) [2021-06-06 00:13:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 25026 transitions. [2021-06-06 00:13:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:31,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:31,884 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:32,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-06 00:13:32,084 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-06 00:13:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:32,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113329436] [2021-06-06 00:13:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:32,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:32,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113329436] [2021-06-06 00:13:32,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113329436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:32,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231171573] [2021-06-06 00:13:32,118 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:32,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:32,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:32,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231171573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:32,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:32,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:13:32,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490204372] [2021-06-06 00:13:32,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:32,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:32,206 INFO L87 Difference]: Start difference. First operand 6665 states and 25026 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-06 00:13:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:32,846 INFO L93 Difference]: Finished difference Result 12678 states and 44148 transitions. [2021-06-06 00:13:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:13:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-06-06 00:13:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:32,871 INFO L225 Difference]: With dead ends: 12678 [2021-06-06 00:13:32,871 INFO L226 Difference]: Without dead ends: 12678 [2021-06-06 00:13:32,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:13:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-06-06 00:13:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 6895. [2021-06-06 00:13:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6895 states, 6894 states have (on average 3.7358572671888597) internal successors, (25755), 6894 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 25755 transitions. [2021-06-06 00:13:33,024 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 25755 transitions. Word has length 28 [2021-06-06 00:13:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:33,024 INFO L482 AbstractCegarLoop]: Abstraction has 6895 states and 25755 transitions. [2021-06-06 00:13:33,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-06 00:13:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 25755 transitions. [2021-06-06 00:13:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:33,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:33,034 INFO L554 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, 1, 1] [2021-06-06 00:13:33,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4099 [2021-06-06 00:13:33,234 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:33,234 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-06 00:13:33,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:33,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011371467] [2021-06-06 00:13:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:33,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011371467] [2021-06-06 00:13:33,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011371467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335139703] [2021-06-06 00:13:33,262 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:33,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:13:33,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:33,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335139703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:33,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:33,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:13:33,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902007165] [2021-06-06 00:13:33,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:13:33,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:33,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:13:33,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:13:33,348 INFO L87 Difference]: Start difference. First operand 6895 states and 25755 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-06 00:13:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:33,759 INFO L93 Difference]: Finished difference Result 9371 states and 33680 transitions. [2021-06-06 00:13:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:13:33,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-06 00:13:33,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:33,775 INFO L225 Difference]: With dead ends: 9371 [2021-06-06 00:13:33,775 INFO L226 Difference]: Without dead ends: 9341 [2021-06-06 00:13:33,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:13:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-06 00:13:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7751. [2021-06-06 00:13:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.7625806451612904) internal successors, (29160), 7750 states have internal predecessors, (29160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 29160 transitions. [2021-06-06 00:13:33,908 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 29160 transitions. Word has length 28 [2021-06-06 00:13:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:33,908 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 29160 transitions. [2021-06-06 00:13:33,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-06 00:13:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 29160 transitions. [2021-06-06 00:13:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:33,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:33,919 INFO L554 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, 1, 1] [2021-06-06 00:13:34,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-06-06 00:13:34,120 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-06 00:13:34,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:34,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641162716] [2021-06-06 00:13:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:34,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:34,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641162716] [2021-06-06 00:13:34,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641162716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:34,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027466105] [2021-06-06 00:13:34,148 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:34,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:34,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:34,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:34,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027466105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:13:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001347705] [2021-06-06 00:13:34,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:13:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:13:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:13:34,235 INFO L87 Difference]: Start difference. First operand 7751 states and 29160 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-06 00:13:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:34,583 INFO L93 Difference]: Finished difference Result 9993 states and 35743 transitions. [2021-06-06 00:13:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:13:34,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-06 00:13:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:34,601 INFO L225 Difference]: With dead ends: 9993 [2021-06-06 00:13:34,601 INFO L226 Difference]: Without dead ends: 9993 [2021-06-06 00:13:34,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:13:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9993 states. [2021-06-06 00:13:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9993 to 7791. [2021-06-06 00:13:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.7585365853658534) internal successors, (29279), 7790 states have internal predecessors, (29279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 29279 transitions. [2021-06-06 00:13:34,745 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 29279 transitions. Word has length 28 [2021-06-06 00:13:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:34,745 INFO L482 AbstractCegarLoop]: Abstraction has 7791 states and 29279 transitions. [2021-06-06 00:13:34,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-06 00:13:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 29279 transitions. [2021-06-06 00:13:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:34,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:34,755 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:34,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-06-06 00:13:34,956 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-06 00:13:34,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:34,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351649187] [2021-06-06 00:13:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:34,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:34,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351649187] [2021-06-06 00:13:34,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351649187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:34,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442001591] [2021-06-06 00:13:34,991 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:35,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442001591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:35,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:35,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:13:35,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932036617] [2021-06-06 00:13:35,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:35,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:35,071 INFO L87 Difference]: Start difference. First operand 7791 states and 29279 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-06 00:13:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:35,696 INFO L93 Difference]: Finished difference Result 13376 states and 47489 transitions. [2021-06-06 00:13:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:13:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-06-06 00:13:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:35,721 INFO L225 Difference]: With dead ends: 13376 [2021-06-06 00:13:35,721 INFO L226 Difference]: Without dead ends: 13372 [2021-06-06 00:13:35,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:13:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-06-06 00:13:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 7707. [2021-06-06 00:13:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.7608357124318714) internal successors, (28981), 7706 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 28981 transitions. [2021-06-06 00:13:35,896 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 28981 transitions. Word has length 28 [2021-06-06 00:13:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:35,896 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 28981 transitions. [2021-06-06 00:13:35,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-06 00:13:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 28981 transitions. [2021-06-06 00:13:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:35,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:35,907 INFO L554 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, 1, 1] [2021-06-06 00:13:36,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:36,108 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-06 00:13:36,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:36,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394276341] [2021-06-06 00:13:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:36,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394276341] [2021-06-06 00:13:36,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394276341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324757099] [2021-06-06 00:13:36,151 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:36,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324757099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:36,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:36,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:36,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810843704] [2021-06-06 00:13:36,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:36,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:36,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:36,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:36,238 INFO L87 Difference]: Start difference. First operand 7707 states and 28981 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) [2021-06-06 00:13:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:36,677 INFO L93 Difference]: Finished difference Result 10234 states and 36622 transitions. [2021-06-06 00:13:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:13:36,677 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 28 [2021-06-06 00:13:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:36,694 INFO L225 Difference]: With dead ends: 10234 [2021-06-06 00:13:36,694 INFO L226 Difference]: Without dead ends: 10234 [2021-06-06 00:13:36,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:13:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-06-06 00:13:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 7653. [2021-06-06 00:13:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.753659174072138) internal successors, (28723), 7652 states have internal predecessors, (28723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28723 transitions. [2021-06-06 00:13:36,832 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28723 transitions. Word has length 28 [2021-06-06 00:13:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:36,832 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28723 transitions. [2021-06-06 00:13:36,832 INFO L483 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) [2021-06-06 00:13:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28723 transitions. [2021-06-06 00:13:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:36,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:36,894 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:37,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:37,094 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:37,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-06 00:13:37,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:37,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970820496] [2021-06-06 00:13:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:37,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:37,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970820496] [2021-06-06 00:13:37,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970820496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:37,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466342009] [2021-06-06 00:13:37,135 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:37,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:37,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:37,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:37,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466342009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:37,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:37,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:13:37,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428183518] [2021-06-06 00:13:37,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:37,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:37,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:37,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:37,218 INFO L87 Difference]: Start difference. First operand 7653 states and 28723 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) [2021-06-06 00:13:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:37,884 INFO L93 Difference]: Finished difference Result 13259 states and 46986 transitions. [2021-06-06 00:13:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:13:37,884 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 28 [2021-06-06 00:13:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:37,909 INFO L225 Difference]: With dead ends: 13259 [2021-06-06 00:13:37,909 INFO L226 Difference]: Without dead ends: 13247 [2021-06-06 00:13:37,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:13:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13247 states. [2021-06-06 00:13:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13247 to 7653. [2021-06-06 00:13:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.7526136957658127) internal successors, (28715), 7652 states have internal predecessors, (28715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28715 transitions. [2021-06-06 00:13:38,082 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28715 transitions. Word has length 28 [2021-06-06 00:13:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:38,083 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28715 transitions. [2021-06-06 00:13:38,083 INFO L483 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) [2021-06-06 00:13:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28715 transitions. [2021-06-06 00:13:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:38,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:38,094 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:38,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4104,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:38,294 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-06 00:13:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:38,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940408260] [2021-06-06 00:13:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:38,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940408260] [2021-06-06 00:13:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940408260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397340422] [2021-06-06 00:13:38,336 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:38,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:38,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:38,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397340422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:38,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:38,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:13:38,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571381326] [2021-06-06 00:13:38,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:38,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:38,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:38,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:38,435 INFO L87 Difference]: Start difference. First operand 7653 states and 28715 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:39,654 INFO L93 Difference]: Finished difference Result 20233 states and 70540 transitions. [2021-06-06 00:13:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:13:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:39,696 INFO L225 Difference]: With dead ends: 20233 [2021-06-06 00:13:39,696 INFO L226 Difference]: Without dead ends: 20233 [2021-06-06 00:13:39,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:13:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-06-06 00:13:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 10480. [2021-06-06 00:13:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10480 states, 10479 states have (on average 3.7973089035213285) internal successors, (39792), 10479 states have internal predecessors, (39792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10480 states to 10480 states and 39792 transitions. [2021-06-06 00:13:40,005 INFO L78 Accepts]: Start accepts. Automaton has 10480 states and 39792 transitions. Word has length 28 [2021-06-06 00:13:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:40,005 INFO L482 AbstractCegarLoop]: Abstraction has 10480 states and 39792 transitions. [2021-06-06 00:13:40,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10480 states and 39792 transitions. [2021-06-06 00:13:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:40,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:40,020 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:40,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4105 [2021-06-06 00:13:40,221 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-06 00:13:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:40,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690187436] [2021-06-06 00:13:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:40,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690187436] [2021-06-06 00:13:40,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690187436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381919648] [2021-06-06 00:13:40,261 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:40,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:13:40,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:40,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:40,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:40,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381919648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:40,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:40,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:13:40,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062444759] [2021-06-06 00:13:40,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:40,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:40,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:40,355 INFO L87 Difference]: Start difference. First operand 10480 states and 39792 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:41,403 INFO L93 Difference]: Finished difference Result 19460 states and 68525 transitions. [2021-06-06 00:13:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:13:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:41,440 INFO L225 Difference]: With dead ends: 19460 [2021-06-06 00:13:41,440 INFO L226 Difference]: Without dead ends: 19448 [2021-06-06 00:13:41,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:13:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19448 states. [2021-06-06 00:13:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 10294. [2021-06-06 00:13:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10294 states, 10293 states have (on average 3.8036529680365296) internal successors, (39151), 10293 states have internal predecessors, (39151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10294 states to 10294 states and 39151 transitions. [2021-06-06 00:13:41,712 INFO L78 Accepts]: Start accepts. Automaton has 10294 states and 39151 transitions. Word has length 28 [2021-06-06 00:13:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:41,713 INFO L482 AbstractCegarLoop]: Abstraction has 10294 states and 39151 transitions. [2021-06-06 00:13:41,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10294 states and 39151 transitions. [2021-06-06 00:13:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:41,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:41,727 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:41,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:41,928 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-06 00:13:41,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:41,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625655834] [2021-06-06 00:13:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:41,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:41,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625655834] [2021-06-06 00:13:41,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625655834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:41,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086406982] [2021-06-06 00:13:41,968 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:41,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:13:41,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:41,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:42,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086406982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:42,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:42,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:13:42,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041509934] [2021-06-06 00:13:42,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:42,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:42,061 INFO L87 Difference]: Start difference. First operand 10294 states and 39151 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:43,029 INFO L93 Difference]: Finished difference Result 19263 states and 67830 transitions. [2021-06-06 00:13:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:13:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:43,069 INFO L225 Difference]: With dead ends: 19263 [2021-06-06 00:13:43,069 INFO L226 Difference]: Without dead ends: 19227 [2021-06-06 00:13:43,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 566.6ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:13:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19227 states. [2021-06-06 00:13:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19227 to 10338. [2021-06-06 00:13:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10338 states, 10337 states have (on average 3.8017800135435813) internal successors, (39299), 10337 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10338 states to 10338 states and 39299 transitions. [2021-06-06 00:13:43,388 INFO L78 Accepts]: Start accepts. Automaton has 10338 states and 39299 transitions. Word has length 28 [2021-06-06 00:13:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:43,388 INFO L482 AbstractCegarLoop]: Abstraction has 10338 states and 39299 transitions. [2021-06-06 00:13:43,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 10338 states and 39299 transitions. [2021-06-06 00:13:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:43,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:43,403 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:43,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4107,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:43,624 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:43,624 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-06 00:13:43,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:43,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527058506] [2021-06-06 00:13:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:43,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:43,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527058506] [2021-06-06 00:13:43,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527058506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:43,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166628853] [2021-06-06 00:13:43,665 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:43,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166628853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:43,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:43,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:13:43,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306741493] [2021-06-06 00:13:43,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:43,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:43,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:43,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:43,783 INFO L87 Difference]: Start difference. First operand 10338 states and 39299 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) [2021-06-06 00:13:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:45,137 INFO L93 Difference]: Finished difference Result 19164 states and 67607 transitions. [2021-06-06 00:13:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:13:45,137 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 28 [2021-06-06 00:13:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:45,172 INFO L225 Difference]: With dead ends: 19164 [2021-06-06 00:13:45,172 INFO L226 Difference]: Without dead ends: 19164 [2021-06-06 00:13:45,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 885.6ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:13:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19164 states. [2021-06-06 00:13:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19164 to 10534. [2021-06-06 00:13:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10534 states, 10533 states have (on average 3.79274660590525) internal successors, (39949), 10533 states have internal predecessors, (39949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10534 states to 10534 states and 39949 transitions. [2021-06-06 00:13:45,487 INFO L78 Accepts]: Start accepts. Automaton has 10534 states and 39949 transitions. Word has length 28 [2021-06-06 00:13:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:45,487 INFO L482 AbstractCegarLoop]: Abstraction has 10534 states and 39949 transitions. [2021-06-06 00:13:45,487 INFO L483 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) [2021-06-06 00:13:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 10534 states and 39949 transitions. [2021-06-06 00:13:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:45,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:45,502 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:45,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4108 [2021-06-06 00:13:45,703 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:45,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:45,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-06 00:13:45,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:45,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743901948] [2021-06-06 00:13:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:45,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:45,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743901948] [2021-06-06 00:13:45,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743901948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:45,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450328321] [2021-06-06 00:13:45,743 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:45,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:45,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:45,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:45,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450328321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:45,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:45,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:13:45,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916610411] [2021-06-06 00:13:45,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:45,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:45,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:45,854 INFO L87 Difference]: Start difference. First operand 10534 states and 39949 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) [2021-06-06 00:13:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:47,105 INFO L93 Difference]: Finished difference Result 18787 states and 66570 transitions. [2021-06-06 00:13:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:13:47,105 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 28 [2021-06-06 00:13:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:47,141 INFO L225 Difference]: With dead ends: 18787 [2021-06-06 00:13:47,142 INFO L226 Difference]: Without dead ends: 18775 [2021-06-06 00:13:47,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:13:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-06-06 00:13:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10416. [2021-06-06 00:13:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10416 states, 10415 states have (on average 3.797215554488718) internal successors, (39548), 10415 states have internal predecessors, (39548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10416 states to 10416 states and 39548 transitions. [2021-06-06 00:13:47,487 INFO L78 Accepts]: Start accepts. Automaton has 10416 states and 39548 transitions. Word has length 28 [2021-06-06 00:13:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:47,487 INFO L482 AbstractCegarLoop]: Abstraction has 10416 states and 39548 transitions. [2021-06-06 00:13:47,487 INFO L483 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) [2021-06-06 00:13:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 10416 states and 39548 transitions. [2021-06-06 00:13:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:47,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:47,502 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:47,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:47,702 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-06 00:13:47,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:47,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445828614] [2021-06-06 00:13:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:47,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:47,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445828614] [2021-06-06 00:13:47,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445828614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:47,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017389803] [2021-06-06 00:13:47,748 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:47,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:13:47,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:47,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:47,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:47,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017389803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:47,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:47,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:13:47,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647224627] [2021-06-06 00:13:47,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:47,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:47,863 INFO L87 Difference]: Start difference. First operand 10416 states and 39548 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:48,968 INFO L93 Difference]: Finished difference Result 18027 states and 64486 transitions. [2021-06-06 00:13:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:13:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:13:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:49,003 INFO L225 Difference]: With dead ends: 18027 [2021-06-06 00:13:49,003 INFO L226 Difference]: Without dead ends: 17991 [2021-06-06 00:13:49,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:13:49,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17991 states. [2021-06-06 00:13:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17991 to 10440. [2021-06-06 00:13:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.796149056423029) internal successors, (39628), 10439 states have internal predecessors, (39628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 39628 transitions. [2021-06-06 00:13:49,246 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 39628 transitions. Word has length 28 [2021-06-06 00:13:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:49,246 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 39628 transitions. [2021-06-06 00:13:49,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 39628 transitions. [2021-06-06 00:13:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:49,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:49,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:49,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-06 00:13:49,462 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:49,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-06 00:13:49,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:49,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145081470] [2021-06-06 00:13:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:49,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:49,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145081470] [2021-06-06 00:13:49,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145081470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:49,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841888499] [2021-06-06 00:13:49,497 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:49,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:49,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:49,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:49,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841888499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:49,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:49,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:49,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445684747] [2021-06-06 00:13:49,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:49,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:49,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:49,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:49,661 INFO L87 Difference]: Start difference. First operand 10440 states and 39628 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:51,016 INFO L93 Difference]: Finished difference Result 26119 states and 92958 transitions. [2021-06-06 00:13:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-06 00:13:51,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:51,069 INFO L225 Difference]: With dead ends: 26119 [2021-06-06 00:13:51,069 INFO L226 Difference]: Without dead ends: 26119 [2021-06-06 00:13:51,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 823.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:13:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26119 states. [2021-06-06 00:13:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26119 to 10727. [2021-06-06 00:13:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10727 states, 10726 states have (on average 3.821928025358941) internal successors, (40994), 10726 states have internal predecessors, (40994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10727 states to 10727 states and 40994 transitions. [2021-06-06 00:13:51,402 INFO L78 Accepts]: Start accepts. Automaton has 10727 states and 40994 transitions. Word has length 28 [2021-06-06 00:13:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:51,402 INFO L482 AbstractCegarLoop]: Abstraction has 10727 states and 40994 transitions. [2021-06-06 00:13:51,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 10727 states and 40994 transitions. [2021-06-06 00:13:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:51,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:51,418 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:51,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-06-06 00:13:51,618 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-06 00:13:51,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:51,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742291797] [2021-06-06 00:13:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:51,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742291797] [2021-06-06 00:13:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742291797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510212925] [2021-06-06 00:13:51,654 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:51,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:13:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:51,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510212925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:51,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:51,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031934982] [2021-06-06 00:13:51,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:51,785 INFO L87 Difference]: Start difference. First operand 10727 states and 40994 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:53,080 INFO L93 Difference]: Finished difference Result 25550 states and 91560 transitions. [2021-06-06 00:13:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-06 00:13:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:53,136 INFO L225 Difference]: With dead ends: 25550 [2021-06-06 00:13:53,136 INFO L226 Difference]: Without dead ends: 25550 [2021-06-06 00:13:53,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:13:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25550 states. [2021-06-06 00:13:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25550 to 10629. [2021-06-06 00:13:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 3.8091832894241624) internal successors, (40484), 10628 states have internal predecessors, (40484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 40484 transitions. [2021-06-06 00:13:53,441 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 40484 transitions. Word has length 28 [2021-06-06 00:13:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:53,441 INFO L482 AbstractCegarLoop]: Abstraction has 10629 states and 40484 transitions. [2021-06-06 00:13:53,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 40484 transitions. [2021-06-06 00:13:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:53,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:53,456 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:53,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-06 00:13:53,656 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-06 00:13:53,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:53,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094794791] [2021-06-06 00:13:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:53,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:53,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094794791] [2021-06-06 00:13:53,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094794791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:53,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318897772] [2021-06-06 00:13:53,691 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:53,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:53,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:53,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:53,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318897772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:53,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:53,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:13:53,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158672238] [2021-06-06 00:13:53,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:53,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:53,810 INFO L87 Difference]: Start difference. First operand 10629 states and 40484 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:54,655 INFO L93 Difference]: Finished difference Result 20289 states and 72951 transitions. [2021-06-06 00:13:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:13:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:54,693 INFO L225 Difference]: With dead ends: 20289 [2021-06-06 00:13:54,693 INFO L226 Difference]: Without dead ends: 20289 [2021-06-06 00:13:54,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:13:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20289 states. [2021-06-06 00:13:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20289 to 10638. [2021-06-06 00:13:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 3.8081225909560965) internal successors, (40507), 10637 states have internal predecessors, (40507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 40507 transitions. [2021-06-06 00:13:54,943 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 40507 transitions. Word has length 28 [2021-06-06 00:13:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:54,943 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 40507 transitions. [2021-06-06 00:13:54,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 40507 transitions. [2021-06-06 00:13:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:55,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:55,029 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:55,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:55,230 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-06 00:13:55,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:55,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973899075] [2021-06-06 00:13:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:55,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973899075] [2021-06-06 00:13:55,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973899075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815845467] [2021-06-06 00:13:55,264 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:55,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815845467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:55,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:55,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:13:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078213694] [2021-06-06 00:13:55,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:55,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:55,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:55,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:55,378 INFO L87 Difference]: Start difference. First operand 10638 states and 40507 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:56,120 INFO L93 Difference]: Finished difference Result 18838 states and 68311 transitions. [2021-06-06 00:13:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:13:56,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:13:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:56,157 INFO L225 Difference]: With dead ends: 18838 [2021-06-06 00:13:56,158 INFO L226 Difference]: Without dead ends: 18838 [2021-06-06 00:13:56,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:13:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18838 states. [2021-06-06 00:13:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18838 to 10650. [2021-06-06 00:13:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 3.807399755845619) internal successors, (40545), 10649 states have internal predecessors, (40545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 40545 transitions. [2021-06-06 00:13:56,426 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 40545 transitions. Word has length 28 [2021-06-06 00:13:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:56,426 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 40545 transitions. [2021-06-06 00:13:56,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 40545 transitions. [2021-06-06 00:13:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:56,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:56,442 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:56,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4114,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:56,642 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-06 00:13:56,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:56,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896344927] [2021-06-06 00:13:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:56,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896344927] [2021-06-06 00:13:56,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896344927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158188309] [2021-06-06 00:13:56,677 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:56,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:56,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:56,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:56,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158188309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:56,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:56,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:56,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265272943] [2021-06-06 00:13:56,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:56,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:56,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:56,802 INFO L87 Difference]: Start difference. First operand 10650 states and 40545 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) [2021-06-06 00:13:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:57,970 INFO L93 Difference]: Finished difference Result 19442 states and 70046 transitions. [2021-06-06 00:13:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:13:57,970 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 28 [2021-06-06 00:13:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:58,012 INFO L225 Difference]: With dead ends: 19442 [2021-06-06 00:13:58,012 INFO L226 Difference]: Without dead ends: 19442 [2021-06-06 00:13:58,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:13:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2021-06-06 00:13:58,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 10758. [2021-06-06 00:13:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10758 states, 10757 states have (on average 3.8002231105326763) internal successors, (40879), 10757 states have internal predecessors, (40879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 40879 transitions. [2021-06-06 00:13:58,351 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 40879 transitions. Word has length 28 [2021-06-06 00:13:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:58,351 INFO L482 AbstractCegarLoop]: Abstraction has 10758 states and 40879 transitions. [2021-06-06 00:13:58,351 INFO L483 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) [2021-06-06 00:13:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 40879 transitions. [2021-06-06 00:13:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:58,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:58,367 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:58,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:58,568 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-06 00:13:58,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:58,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236919301] [2021-06-06 00:13:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:58,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:58,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236919301] [2021-06-06 00:13:58,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236919301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:58,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001900361] [2021-06-06 00:13:58,606 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:58,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:13:58,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:58,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001900361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:58,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:58,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:58,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383313310] [2021-06-06 00:13:58,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:58,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:58,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:58,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:58,728 INFO L87 Difference]: Start difference. First operand 10758 states and 40879 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) [2021-06-06 00:13:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:59,657 INFO L93 Difference]: Finished difference Result 19017 states and 68890 transitions. [2021-06-06 00:13:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:13:59,658 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 28 [2021-06-06 00:13:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:59,696 INFO L225 Difference]: With dead ends: 19017 [2021-06-06 00:13:59,696 INFO L226 Difference]: Without dead ends: 19013 [2021-06-06 00:13:59,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 581.4ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:13:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19013 states. [2021-06-06 00:13:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19013 to 10684. [2021-06-06 00:13:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10683 states have (on average 3.804174857249836) internal successors, (40640), 10683 states have internal predecessors, (40640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 40640 transitions. [2021-06-06 00:13:59,967 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 40640 transitions. Word has length 28 [2021-06-06 00:13:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:59,967 INFO L482 AbstractCegarLoop]: Abstraction has 10684 states and 40640 transitions. [2021-06-06 00:13:59,967 INFO L483 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) [2021-06-06 00:13:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 40640 transitions. [2021-06-06 00:13:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:59,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:59,983 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:00,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4116,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:00,183 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:00,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-06 00:14:00,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:00,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791449401] [2021-06-06 00:14:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:00,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:00,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791449401] [2021-06-06 00:14:00,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791449401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:00,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921767821] [2021-06-06 00:14:00,224 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:00,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:00,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:00,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921767821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:00,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:00,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:00,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389435621] [2021-06-06 00:14:00,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:00,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:00,344 INFO L87 Difference]: Start difference. First operand 10684 states and 40640 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:01,436 INFO L93 Difference]: Finished difference Result 18448 states and 66382 transitions. [2021-06-06 00:14:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:14:01,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:14:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:01,475 INFO L225 Difference]: With dead ends: 18448 [2021-06-06 00:14:01,475 INFO L226 Difference]: Without dead ends: 18448 [2021-06-06 00:14:01,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 665.3ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:14:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18448 states. [2021-06-06 00:14:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18448 to 10911. [2021-06-06 00:14:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10911 states, 10910 states have (on average 3.807332722273144) internal successors, (41538), 10910 states have internal predecessors, (41538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10911 states to 10911 states and 41538 transitions. [2021-06-06 00:14:01,745 INFO L78 Accepts]: Start accepts. Automaton has 10911 states and 41538 transitions. Word has length 28 [2021-06-06 00:14:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:01,745 INFO L482 AbstractCegarLoop]: Abstraction has 10911 states and 41538 transitions. [2021-06-06 00:14:01,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 10911 states and 41538 transitions. [2021-06-06 00:14:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:01,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:01,760 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:01,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4117 [2021-06-06 00:14:01,961 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-06 00:14:01,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:01,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014855475] [2021-06-06 00:14:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:02,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:02,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014855475] [2021-06-06 00:14:02,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014855475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:02,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241720634] [2021-06-06 00:14:02,001 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:02,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:14:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:02,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241720634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:02,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:02,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896351244] [2021-06-06 00:14:02,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:02,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:02,114 INFO L87 Difference]: Start difference. First operand 10911 states and 41538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:03,072 INFO L93 Difference]: Finished difference Result 18161 states and 65584 transitions. [2021-06-06 00:14:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:14:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:14:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:03,106 INFO L225 Difference]: With dead ends: 18161 [2021-06-06 00:14:03,107 INFO L226 Difference]: Without dead ends: 18149 [2021-06-06 00:14:03,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:14:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18149 states. [2021-06-06 00:14:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18149 to 11013. [2021-06-06 00:14:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 11012 states have (on average 3.801398474391573) internal successors, (41861), 11012 states have internal predecessors, (41861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 41861 transitions. [2021-06-06 00:14:03,368 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 41861 transitions. Word has length 28 [2021-06-06 00:14:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:03,368 INFO L482 AbstractCegarLoop]: Abstraction has 11013 states and 41861 transitions. [2021-06-06 00:14:03,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 41861 transitions. [2021-06-06 00:14:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:03,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:03,384 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:03,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:03,585 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:03,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 70 times [2021-06-06 00:14:03,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:03,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93392047] [2021-06-06 00:14:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:03,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93392047] [2021-06-06 00:14:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93392047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388125656] [2021-06-06 00:14:03,626 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:03,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:03,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:03,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388125656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:03,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:03,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:14:03,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871385713] [2021-06-06 00:14:03,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:03,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:03,715 INFO L87 Difference]: Start difference. First operand 11013 states and 41861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:04,189 INFO L93 Difference]: Finished difference Result 15676 states and 57990 transitions. [2021-06-06 00:14:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:14:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:14:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:04,221 INFO L225 Difference]: With dead ends: 15676 [2021-06-06 00:14:04,221 INFO L226 Difference]: Without dead ends: 15676 [2021-06-06 00:14:04,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:14:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15676 states. [2021-06-06 00:14:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15676 to 11085. [2021-06-06 00:14:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11085 states, 11084 states have (on average 3.7969144713099965) internal successors, (42085), 11084 states have internal predecessors, (42085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11085 states to 11085 states and 42085 transitions. [2021-06-06 00:14:04,458 INFO L78 Accepts]: Start accepts. Automaton has 11085 states and 42085 transitions. Word has length 28 [2021-06-06 00:14:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:04,458 INFO L482 AbstractCegarLoop]: Abstraction has 11085 states and 42085 transitions. [2021-06-06 00:14:04,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 11085 states and 42085 transitions. [2021-06-06 00:14:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:04,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:04,474 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:04,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4119 [2021-06-06 00:14:04,675 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:04,675 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 71 times [2021-06-06 00:14:04,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:04,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323938546] [2021-06-06 00:14:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:04,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:04,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323938546] [2021-06-06 00:14:04,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323938546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:04,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303315486] [2021-06-06 00:14:04,711 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:04,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:14:04,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:04,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:04,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:04,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303315486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:04,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:04,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:04,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254024528] [2021-06-06 00:14:04,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:04,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:04,801 INFO L87 Difference]: Start difference. First operand 11085 states and 42085 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) [2021-06-06 00:14:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:05,330 INFO L93 Difference]: Finished difference Result 16651 states and 60827 transitions. [2021-06-06 00:14:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:14:05,330 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 28 [2021-06-06 00:14:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:05,362 INFO L225 Difference]: With dead ends: 16651 [2021-06-06 00:14:05,362 INFO L226 Difference]: Without dead ends: 16651 [2021-06-06 00:14:05,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:14:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16651 states. [2021-06-06 00:14:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16651 to 11413. [2021-06-06 00:14:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11413 states, 11412 states have (on average 3.7797932001402033) internal successors, (43135), 11412 states have internal predecessors, (43135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11413 states to 11413 states and 43135 transitions. [2021-06-06 00:14:05,610 INFO L78 Accepts]: Start accepts. Automaton has 11413 states and 43135 transitions. Word has length 28 [2021-06-06 00:14:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:05,610 INFO L482 AbstractCegarLoop]: Abstraction has 11413 states and 43135 transitions. [2021-06-06 00:14:05,610 INFO L483 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) [2021-06-06 00:14:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11413 states and 43135 transitions. [2021-06-06 00:14:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:05,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:05,626 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:05,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-06 00:14:05,827 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:05,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:05,827 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 72 times [2021-06-06 00:14:05,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:05,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788006603] [2021-06-06 00:14:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:05,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788006603] [2021-06-06 00:14:05,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788006603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342483939] [2021-06-06 00:14:05,863 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:05,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:14:05,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:05,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:05,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342483939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:05,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:05,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:05,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609086512] [2021-06-06 00:14:05,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:05,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:05,949 INFO L87 Difference]: Start difference. First operand 11413 states and 43135 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) [2021-06-06 00:14:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:06,381 INFO L93 Difference]: Finished difference Result 16138 states and 59485 transitions. [2021-06-06 00:14:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:14:06,381 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 28 [2021-06-06 00:14:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:06,413 INFO L225 Difference]: With dead ends: 16138 [2021-06-06 00:14:06,413 INFO L226 Difference]: Without dead ends: 16130 [2021-06-06 00:14:06,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:14:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16130 states. [2021-06-06 00:14:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16130 to 11353. [2021-06-06 00:14:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 3.781800563777308) internal successors, (42931), 11352 states have internal predecessors, (42931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 42931 transitions. [2021-06-06 00:14:06,721 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 42931 transitions. Word has length 28 [2021-06-06 00:14:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:06,721 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 42931 transitions. [2021-06-06 00:14:06,721 INFO L483 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) [2021-06-06 00:14:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 42931 transitions. [2021-06-06 00:14:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:06,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:06,738 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:06,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-06-06 00:14:06,938 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 73 times [2021-06-06 00:14:06,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:06,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774653501] [2021-06-06 00:14:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:06,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:06,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774653501] [2021-06-06 00:14:06,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774653501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:06,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546605837] [2021-06-06 00:14:06,984 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:07,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:07,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546605837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:07,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:07,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:14:07,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576320930] [2021-06-06 00:14:07,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:07,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:07,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:07,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:07,066 INFO L87 Difference]: Start difference. First operand 11353 states and 42931 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:07,530 INFO L93 Difference]: Finished difference Result 16038 states and 59197 transitions. [2021-06-06 00:14:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:14:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:14:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:07,565 INFO L225 Difference]: With dead ends: 16038 [2021-06-06 00:14:07,566 INFO L226 Difference]: Without dead ends: 16026 [2021-06-06 00:14:07,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:14:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16026 states. [2021-06-06 00:14:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16026 to 11325. [2021-06-06 00:14:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11324 states have (on average 3.7826739667961853) internal successors, (42835), 11324 states have internal predecessors, (42835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 42835 transitions. [2021-06-06 00:14:07,807 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 42835 transitions. Word has length 28 [2021-06-06 00:14:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:07,807 INFO L482 AbstractCegarLoop]: Abstraction has 11325 states and 42835 transitions. [2021-06-06 00:14:07,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 42835 transitions. [2021-06-06 00:14:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:07,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:07,824 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:08,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-06-06 00:14:08,025 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 74 times [2021-06-06 00:14:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:08,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857129755] [2021-06-06 00:14:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:08,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857129755] [2021-06-06 00:14:08,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857129755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382712344] [2021-06-06 00:14:08,061 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:08,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:08,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:08,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:08,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382712344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:08,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:08,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:14:08,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913310355] [2021-06-06 00:14:08,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:08,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:08,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:08,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:08,180 INFO L87 Difference]: Start difference. First operand 11325 states and 42835 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-06 00:14:09,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:09,111 INFO L93 Difference]: Finished difference Result 21822 states and 77756 transitions. [2021-06-06 00:14:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:14:09,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-06-06 00:14:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:09,153 INFO L225 Difference]: With dead ends: 21822 [2021-06-06 00:14:09,153 INFO L226 Difference]: Without dead ends: 21822 [2021-06-06 00:14:09,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 519.5ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:14:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21822 states. [2021-06-06 00:14:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21822 to 11307. [2021-06-06 00:14:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.7813550327259864) internal successors, (42752), 11306 states have internal predecessors, (42752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 42752 transitions. [2021-06-06 00:14:09,418 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 42752 transitions. Word has length 28 [2021-06-06 00:14:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:09,418 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 42752 transitions. [2021-06-06 00:14:09,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-06 00:14:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 42752 transitions. [2021-06-06 00:14:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:09,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:09,508 INFO L554 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, 1, 1] [2021-06-06 00:14:09,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-06-06 00:14:09,709 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-06 00:14:09,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:09,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620224424] [2021-06-06 00:14:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:09,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:09,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620224424] [2021-06-06 00:14:09,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620224424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:09,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728996198] [2021-06-06 00:14:09,737 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:09,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:14:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:09,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728996198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:09,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:09,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:14:09,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048475768] [2021-06-06 00:14:09,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:09,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:09,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:09,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:09,848 INFO L87 Difference]: Start difference. First operand 11307 states and 42752 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-06 00:14:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:10,537 INFO L93 Difference]: Finished difference Result 17653 states and 63688 transitions. [2021-06-06 00:14:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:14:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-06 00:14:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:10,571 INFO L225 Difference]: With dead ends: 17653 [2021-06-06 00:14:10,572 INFO L226 Difference]: Without dead ends: 17640 [2021-06-06 00:14:10,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:14:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2021-06-06 00:14:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 12618. [2021-06-06 00:14:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.8484584291035904) internal successors, (48556), 12617 states have internal predecessors, (48556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 48556 transitions. [2021-06-06 00:14:10,847 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 48556 transitions. Word has length 28 [2021-06-06 00:14:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:10,848 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 48556 transitions. [2021-06-06 00:14:10,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-06 00:14:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 48556 transitions. [2021-06-06 00:14:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:10,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:10,867 INFO L554 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, 1, 1] [2021-06-06 00:14:11,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:11,068 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:11,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-06 00:14:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:11,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491774844] [2021-06-06 00:14:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:11,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491774844] [2021-06-06 00:14:11,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491774844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110602789] [2021-06-06 00:14:11,095 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:11,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:11,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:11,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110602789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:11,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:11,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:14:11,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577387895] [2021-06-06 00:14:11,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:11,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:11,203 INFO L87 Difference]: Start difference. First operand 12618 states and 48556 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-06 00:14:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:11,956 INFO L93 Difference]: Finished difference Result 17754 states and 63945 transitions. [2021-06-06 00:14:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:14:11,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-06 00:14:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:11,990 INFO L225 Difference]: With dead ends: 17754 [2021-06-06 00:14:11,990 INFO L226 Difference]: Without dead ends: 17748 [2021-06-06 00:14:11,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:14:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17748 states. [2021-06-06 00:14:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17748 to 12591. [2021-06-06 00:14:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12591 states, 12590 states have (on average 3.8476568705321683) internal successors, (48442), 12590 states have internal predecessors, (48442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12591 states to 12591 states and 48442 transitions. [2021-06-06 00:14:12,382 INFO L78 Accepts]: Start accepts. Automaton has 12591 states and 48442 transitions. Word has length 28 [2021-06-06 00:14:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:12,382 INFO L482 AbstractCegarLoop]: Abstraction has 12591 states and 48442 transitions. [2021-06-06 00:14:12,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-06 00:14:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 12591 states and 48442 transitions. [2021-06-06 00:14:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:12,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:12,402 INFO L554 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, 1, 1] [2021-06-06 00:14:12,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:12,603 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:12,603 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-06 00:14:12,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:12,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411277817] [2021-06-06 00:14:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:12,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:12,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411277817] [2021-06-06 00:14:12,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411277817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:12,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558524392] [2021-06-06 00:14:12,630 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:12,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:12,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:12,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558524392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:12,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:12,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:14:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971470972] [2021-06-06 00:14:12,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:12,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:12,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:12,731 INFO L87 Difference]: Start difference. First operand 12591 states and 48442 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:14:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:13,380 INFO L93 Difference]: Finished difference Result 19810 states and 71449 transitions. [2021-06-06 00:14:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:14:13,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-06 00:14:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:13,424 INFO L225 Difference]: With dead ends: 19810 [2021-06-06 00:14:13,424 INFO L226 Difference]: Without dead ends: 19797 [2021-06-06 00:14:13,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:14:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19797 states. [2021-06-06 00:14:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19797 to 12651. [2021-06-06 00:14:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.8523320158102767) internal successors, (48732), 12650 states have internal predecessors, (48732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 48732 transitions. [2021-06-06 00:14:13,725 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 48732 transitions. Word has length 28 [2021-06-06 00:14:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:13,725 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 48732 transitions. [2021-06-06 00:14:13,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:14:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 48732 transitions. [2021-06-06 00:14:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:13,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:13,745 INFO L554 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, 1, 1] [2021-06-06 00:14:13,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:13,945 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-06 00:14:13,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:13,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033653879] [2021-06-06 00:14:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:13,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:13,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033653879] [2021-06-06 00:14:13,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033653879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:13,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739805387] [2021-06-06 00:14:13,972 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:13,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:14:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:13,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:14,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739805387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:14,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:14,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:14:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621777698] [2021-06-06 00:14:14,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:14,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:14,075 INFO L87 Difference]: Start difference. First operand 12651 states and 48732 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:14:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:14,761 INFO L93 Difference]: Finished difference Result 20959 states and 75039 transitions. [2021-06-06 00:14:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:14:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-06 00:14:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:14,801 INFO L225 Difference]: With dead ends: 20959 [2021-06-06 00:14:14,801 INFO L226 Difference]: Without dead ends: 20959 [2021-06-06 00:14:14,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:14:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20959 states. [2021-06-06 00:14:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20959 to 12667. [2021-06-06 00:14:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12667 states, 12666 states have (on average 3.849281541133744) internal successors, (48755), 12666 states have internal predecessors, (48755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12667 states to 12667 states and 48755 transitions. [2021-06-06 00:14:15,195 INFO L78 Accepts]: Start accepts. Automaton has 12667 states and 48755 transitions. Word has length 28 [2021-06-06 00:14:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:15,196 INFO L482 AbstractCegarLoop]: Abstraction has 12667 states and 48755 transitions. [2021-06-06 00:14:15,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-06 00:14:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12667 states and 48755 transitions. [2021-06-06 00:14:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:15,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:15,216 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:15,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:15,417 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 75 times [2021-06-06 00:14:15,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:15,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600825168] [2021-06-06 00:14:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:15,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:15,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600825168] [2021-06-06 00:14:15,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600825168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:15,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749835964] [2021-06-06 00:14:15,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:15,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:14:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:15,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749835964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:15,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:15,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:14:15,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268800481] [2021-06-06 00:14:15,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:15,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:15,563 INFO L87 Difference]: Start difference. First operand 12667 states and 48755 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-06-06 00:14:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:16,548 INFO L93 Difference]: Finished difference Result 22039 states and 80934 transitions. [2021-06-06 00:14:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:14:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-06 00:14:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:16,592 INFO L225 Difference]: With dead ends: 22039 [2021-06-06 00:14:16,592 INFO L226 Difference]: Without dead ends: 22035 [2021-06-06 00:14:16,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:14:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22035 states. [2021-06-06 00:14:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22035 to 12921. [2021-06-06 00:14:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12921 states, 12920 states have (on average 3.8388544891640866) internal successors, (49598), 12920 states have internal predecessors, (49598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12921 states to 12921 states and 49598 transitions. [2021-06-06 00:14:16,928 INFO L78 Accepts]: Start accepts. Automaton has 12921 states and 49598 transitions. Word has length 28 [2021-06-06 00:14:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:16,929 INFO L482 AbstractCegarLoop]: Abstraction has 12921 states and 49598 transitions. [2021-06-06 00:14:16,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-06-06 00:14:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 12921 states and 49598 transitions. [2021-06-06 00:14:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:16,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:16,948 INFO L554 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, 1, 1] [2021-06-06 00:14:17,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:17,149 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-06 00:14:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:17,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872340650] [2021-06-06 00:14:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:17,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:17,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872340650] [2021-06-06 00:14:17,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872340650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:17,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710134360] [2021-06-06 00:14:17,180 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:17,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:17,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710134360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:17,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:17,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:14:17,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298374123] [2021-06-06 00:14:17,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:17,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:17,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:17,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:17,275 INFO L87 Difference]: Start difference. First operand 12921 states and 49598 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) [2021-06-06 00:14:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:17,901 INFO L93 Difference]: Finished difference Result 18745 states and 68634 transitions. [2021-06-06 00:14:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:14:17,902 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 28 [2021-06-06 00:14:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:17,939 INFO L225 Difference]: With dead ends: 18745 [2021-06-06 00:14:17,939 INFO L226 Difference]: Without dead ends: 18722 [2021-06-06 00:14:17,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:14:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18722 states. [2021-06-06 00:14:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18722 to 13216. [2021-06-06 00:14:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 13215 states have (on average 3.855996973136587) internal successors, (50957), 13215 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 50957 transitions. [2021-06-06 00:14:18,221 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 50957 transitions. Word has length 28 [2021-06-06 00:14:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:18,221 INFO L482 AbstractCegarLoop]: Abstraction has 13216 states and 50957 transitions. [2021-06-06 00:14:18,222 INFO L483 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) [2021-06-06 00:14:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 50957 transitions. [2021-06-06 00:14:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:18,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:18,241 INFO L554 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, 1, 1] [2021-06-06 00:14:18,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4129,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:18,441 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:18,442 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-06 00:14:18,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:18,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461438519] [2021-06-06 00:14:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:18,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:18,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461438519] [2021-06-06 00:14:18,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461438519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:18,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731450289] [2021-06-06 00:14:18,473 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:18,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:14:18,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:18,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:18,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:18,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731450289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:18,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:18,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:14:18,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702548220] [2021-06-06 00:14:18,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:18,664 INFO L87 Difference]: Start difference. First operand 13216 states and 50957 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) [2021-06-06 00:14:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:19,384 INFO L93 Difference]: Finished difference Result 18738 states and 67728 transitions. [2021-06-06 00:14:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:14:19,384 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 28 [2021-06-06 00:14:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:19,420 INFO L225 Difference]: With dead ends: 18738 [2021-06-06 00:14:19,421 INFO L226 Difference]: Without dead ends: 18738 [2021-06-06 00:14:19,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:14:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18738 states. [2021-06-06 00:14:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18738 to 13171. [2021-06-06 00:14:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 13170 states have (on average 3.847835990888383) internal successors, (50676), 13170 states have internal predecessors, (50676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 50676 transitions. [2021-06-06 00:14:19,704 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 50676 transitions. Word has length 28 [2021-06-06 00:14:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:19,705 INFO L482 AbstractCegarLoop]: Abstraction has 13171 states and 50676 transitions. [2021-06-06 00:14:19,705 INFO L483 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) [2021-06-06 00:14:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 50676 transitions. [2021-06-06 00:14:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:19,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:19,725 INFO L554 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, 1, 1] [2021-06-06 00:14:19,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4130,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:19,929 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-06 00:14:19,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:19,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905308705] [2021-06-06 00:14:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:19,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:19,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905308705] [2021-06-06 00:14:19,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905308705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:19,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747297672] [2021-06-06 00:14:19,961 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:19,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:14:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747297672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:20,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:20,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:14:20,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710705985] [2021-06-06 00:14:20,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:20,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:20,060 INFO L87 Difference]: Start difference. First operand 13171 states and 50676 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) [2021-06-06 00:14:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:20,718 INFO L93 Difference]: Finished difference Result 20089 states and 73010 transitions. [2021-06-06 00:14:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:14:20,718 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 28 [2021-06-06 00:14:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:20,758 INFO L225 Difference]: With dead ends: 20089 [2021-06-06 00:14:20,758 INFO L226 Difference]: Without dead ends: 20089 [2021-06-06 00:14:20,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:14:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20089 states. [2021-06-06 00:14:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20089 to 13878. [2021-06-06 00:14:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13877 states have (on average 3.834186063270159) internal successors, (53207), 13877 states have internal predecessors, (53207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 53207 transitions. [2021-06-06 00:14:21,055 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 53207 transitions. Word has length 28 [2021-06-06 00:14:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:21,055 INFO L482 AbstractCegarLoop]: Abstraction has 13878 states and 53207 transitions. [2021-06-06 00:14:21,055 INFO L483 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) [2021-06-06 00:14:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 53207 transitions. [2021-06-06 00:14:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:21,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:21,075 INFO L554 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, 1, 1] [2021-06-06 00:14:21,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-06-06 00:14:21,281 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-06 00:14:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:21,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511668229] [2021-06-06 00:14:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:21,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:21,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511668229] [2021-06-06 00:14:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511668229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124751895] [2021-06-06 00:14:21,314 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:21,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124751895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:21,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:21,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:14:21,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18034096] [2021-06-06 00:14:21,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:21,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:21,417 INFO L87 Difference]: Start difference. First operand 13878 states and 53207 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-06-06 00:14:22,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:22,309 INFO L93 Difference]: Finished difference Result 22502 states and 80640 transitions. [2021-06-06 00:14:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:14:22,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-06 00:14:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:22,352 INFO L225 Difference]: With dead ends: 22502 [2021-06-06 00:14:22,352 INFO L226 Difference]: Without dead ends: 22502 [2021-06-06 00:14:22,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:14:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22502 states. [2021-06-06 00:14:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22502 to 14104. [2021-06-06 00:14:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14104 states, 14103 states have (on average 3.8464156562433525) internal successors, (54246), 14103 states have internal predecessors, (54246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14104 states to 14104 states and 54246 transitions. [2021-06-06 00:14:22,676 INFO L78 Accepts]: Start accepts. Automaton has 14104 states and 54246 transitions. Word has length 28 [2021-06-06 00:14:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:22,676 INFO L482 AbstractCegarLoop]: Abstraction has 14104 states and 54246 transitions. [2021-06-06 00:14:22,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-06-06 00:14:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 14104 states and 54246 transitions. [2021-06-06 00:14:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:22,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:22,696 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:22,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-06-06 00:14:22,897 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 76 times [2021-06-06 00:14:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:22,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869680356] [2021-06-06 00:14:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:22,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:22,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869680356] [2021-06-06 00:14:22,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869680356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:22,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502855253] [2021-06-06 00:14:22,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:22,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:22,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:23,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502855253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:23,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:23,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:23,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429579438] [2021-06-06 00:14:23,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:23,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:23,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:23,084 INFO L87 Difference]: Start difference. First operand 14104 states and 54246 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:24,593 INFO L93 Difference]: Finished difference Result 39134 states and 140671 transitions. [2021-06-06 00:14:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:14:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:24,691 INFO L225 Difference]: With dead ends: 39134 [2021-06-06 00:14:24,691 INFO L226 Difference]: Without dead ends: 39134 [2021-06-06 00:14:24,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:14:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39134 states. [2021-06-06 00:14:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39134 to 15340. [2021-06-06 00:14:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15340 states, 15339 states have (on average 3.892887411174131) internal successors, (59713), 15339 states have internal predecessors, (59713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15340 states to 15340 states and 59713 transitions. [2021-06-06 00:14:25,407 INFO L78 Accepts]: Start accepts. Automaton has 15340 states and 59713 transitions. Word has length 28 [2021-06-06 00:14:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:25,407 INFO L482 AbstractCegarLoop]: Abstraction has 15340 states and 59713 transitions. [2021-06-06 00:14:25,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 15340 states and 59713 transitions. [2021-06-06 00:14:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:25,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:25,429 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:25,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-06 00:14:25,629 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 77 times [2021-06-06 00:14:25,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:25,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101546506] [2021-06-06 00:14:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:25,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:25,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101546506] [2021-06-06 00:14:25,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101546506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:25,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978204580] [2021-06-06 00:14:25,667 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:25,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:14:25,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:25,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978204580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:25,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:25,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:25,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258150417] [2021-06-06 00:14:25,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:25,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:25,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:25,800 INFO L87 Difference]: Start difference. First operand 15340 states and 59713 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:27,294 INFO L93 Difference]: Finished difference Result 38160 states and 138109 transitions. [2021-06-06 00:14:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:14:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:27,381 INFO L225 Difference]: With dead ends: 38160 [2021-06-06 00:14:27,382 INFO L226 Difference]: Without dead ends: 38160 [2021-06-06 00:14:27,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 897.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:14:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38160 states. [2021-06-06 00:14:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38160 to 15314. [2021-06-06 00:14:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15314 states, 15313 states have (on average 3.88930973682492) internal successors, (59557), 15313 states have internal predecessors, (59557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15314 states to 15314 states and 59557 transitions. [2021-06-06 00:14:27,905 INFO L78 Accepts]: Start accepts. Automaton has 15314 states and 59557 transitions. Word has length 28 [2021-06-06 00:14:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:27,905 INFO L482 AbstractCegarLoop]: Abstraction has 15314 states and 59557 transitions. [2021-06-06 00:14:27,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 15314 states and 59557 transitions. [2021-06-06 00:14:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:27,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:27,928 INFO L554 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, 1, 1] [2021-06-06 00:14:28,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-06 00:14:28,128 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-06 00:14:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:28,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063869943] [2021-06-06 00:14:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:28,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:28,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063869943] [2021-06-06 00:14:28,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063869943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:28,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196416011] [2021-06-06 00:14:28,163 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:28,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:28,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196416011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:28,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:28,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538484007] [2021-06-06 00:14:28,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:28,241 INFO L87 Difference]: Start difference. First operand 15314 states and 59557 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:28,530 INFO L93 Difference]: Finished difference Result 23675 states and 90680 transitions. [2021-06-06 00:14:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:14:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:28,576 INFO L225 Difference]: With dead ends: 23675 [2021-06-06 00:14:28,576 INFO L226 Difference]: Without dead ends: 23628 [2021-06-06 00:14:28,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:14:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23628 states. [2021-06-06 00:14:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23628 to 20433. [2021-06-06 00:14:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20433 states, 20432 states have (on average 3.903680501174628) internal successors, (79760), 20432 states have internal predecessors, (79760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20433 states to 20433 states and 79760 transitions. [2021-06-06 00:14:29,033 INFO L78 Accepts]: Start accepts. Automaton has 20433 states and 79760 transitions. Word has length 28 [2021-06-06 00:14:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:29,034 INFO L482 AbstractCegarLoop]: Abstraction has 20433 states and 79760 transitions. [2021-06-06 00:14:29,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 20433 states and 79760 transitions. [2021-06-06 00:14:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:29,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:29,063 INFO L554 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, 1, 1] [2021-06-06 00:14:29,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:29,263 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:29,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-06 00:14:29,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:29,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248390905] [2021-06-06 00:14:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:29,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:29,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248390905] [2021-06-06 00:14:29,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248390905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:29,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754449955] [2021-06-06 00:14:29,292 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:29,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:29,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:29,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:29,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:29,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754449955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:29,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:29,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:14:29,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147461665] [2021-06-06 00:14:29,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:29,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:29,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:29,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:29,372 INFO L87 Difference]: Start difference. First operand 20433 states and 79760 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:29,611 INFO L93 Difference]: Finished difference Result 23187 states and 88130 transitions. [2021-06-06 00:14:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:14:29,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:29,659 INFO L225 Difference]: With dead ends: 23187 [2021-06-06 00:14:29,659 INFO L226 Difference]: Without dead ends: 23187 [2021-06-06 00:14:29,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:14:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23187 states. [2021-06-06 00:14:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23187 to 19936. [2021-06-06 00:14:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19936 states, 19935 states have (on average 3.89204915976925) internal successors, (77588), 19935 states have internal predecessors, (77588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19936 states to 19936 states and 77588 transitions. [2021-06-06 00:14:30,061 INFO L78 Accepts]: Start accepts. Automaton has 19936 states and 77588 transitions. Word has length 28 [2021-06-06 00:14:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:30,061 INFO L482 AbstractCegarLoop]: Abstraction has 19936 states and 77588 transitions. [2021-06-06 00:14:30,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 19936 states and 77588 transitions. [2021-06-06 00:14:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:30,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:30,091 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:30,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:30,291 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-06 00:14:30,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:30,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285527666] [2021-06-06 00:14:30,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:30,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285527666] [2021-06-06 00:14:30,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285527666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:30,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894044852] [2021-06-06 00:14:30,334 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:30,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:30,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:30,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894044852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:30,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:30,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:14:30,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707109677] [2021-06-06 00:14:30,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:30,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:30,440 INFO L87 Difference]: Start difference. First operand 19936 states and 77588 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:31,360 INFO L93 Difference]: Finished difference Result 31776 states and 117695 transitions. [2021-06-06 00:14:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:14:31,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:31,433 INFO L225 Difference]: With dead ends: 31776 [2021-06-06 00:14:31,433 INFO L226 Difference]: Without dead ends: 31776 [2021-06-06 00:14:31,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:14:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31776 states. [2021-06-06 00:14:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31776 to 20002. [2021-06-06 00:14:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20002 states, 20001 states have (on average 3.8901054947252636) internal successors, (77806), 20001 states have internal predecessors, (77806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 77806 transitions. [2021-06-06 00:14:32,067 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 77806 transitions. Word has length 28 [2021-06-06 00:14:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:32,067 INFO L482 AbstractCegarLoop]: Abstraction has 20002 states and 77806 transitions. [2021-06-06 00:14:32,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 77806 transitions. [2021-06-06 00:14:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:32,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:32,097 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:32,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:32,298 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:32,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:32,298 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-06 00:14:32,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:32,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434977084] [2021-06-06 00:14:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:32,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:32,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434977084] [2021-06-06 00:14:32,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434977084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:32,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931657443] [2021-06-06 00:14:32,339 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:32,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:14:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:32,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931657443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:32,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:32,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:14:32,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654913830] [2021-06-06 00:14:32,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:32,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:32,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:32,471 INFO L87 Difference]: Start difference. First operand 20002 states and 77806 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:33,920 INFO L93 Difference]: Finished difference Result 40610 states and 148783 transitions. [2021-06-06 00:14:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:14:33,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:34,011 INFO L225 Difference]: With dead ends: 40610 [2021-06-06 00:14:34,012 INFO L226 Difference]: Without dead ends: 40610 [2021-06-06 00:14:34,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:14:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-06-06 00:14:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 20007. [2021-06-06 00:14:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20007 states, 20006 states have (on average 3.892182345296411) internal successors, (77867), 20006 states have internal predecessors, (77867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20007 states to 20007 states and 77867 transitions. [2021-06-06 00:14:34,591 INFO L78 Accepts]: Start accepts. Automaton has 20007 states and 77867 transitions. Word has length 28 [2021-06-06 00:14:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:34,591 INFO L482 AbstractCegarLoop]: Abstraction has 20007 states and 77867 transitions. [2021-06-06 00:14:34,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 20007 states and 77867 transitions. [2021-06-06 00:14:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:34,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:34,621 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:34,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4138 [2021-06-06 00:14:34,822 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-06 00:14:34,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:34,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855653752] [2021-06-06 00:14:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:34,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:34,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855653752] [2021-06-06 00:14:34,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855653752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:34,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275078472] [2021-06-06 00:14:34,859 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:34,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:14:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:35,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275078472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:35,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:35,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:14:35,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990442548] [2021-06-06 00:14:35,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:35,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:35,004 INFO L87 Difference]: Start difference. First operand 20007 states and 77867 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:36,499 INFO L93 Difference]: Finished difference Result 40173 states and 147928 transitions. [2021-06-06 00:14:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:14:36,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:36,595 INFO L225 Difference]: With dead ends: 40173 [2021-06-06 00:14:36,596 INFO L226 Difference]: Without dead ends: 40173 [2021-06-06 00:14:36,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 943.1ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:14:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40173 states. [2021-06-06 00:14:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40173 to 19795. [2021-06-06 00:14:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19795 states, 19794 states have (on average 3.884308376275639) internal successors, (76886), 19794 states have internal predecessors, (76886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19795 states to 19795 states and 76886 transitions. [2021-06-06 00:14:37,169 INFO L78 Accepts]: Start accepts. Automaton has 19795 states and 76886 transitions. Word has length 28 [2021-06-06 00:14:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:37,169 INFO L482 AbstractCegarLoop]: Abstraction has 19795 states and 76886 transitions. [2021-06-06 00:14:37,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 19795 states and 76886 transitions. [2021-06-06 00:14:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:37,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:37,197 INFO L554 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, 1, 1] [2021-06-06 00:14:37,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:37,398 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-06 00:14:37,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:37,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136642873] [2021-06-06 00:14:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:37,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:37,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136642873] [2021-06-06 00:14:37,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136642873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:37,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396805803] [2021-06-06 00:14:37,427 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:14:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:14:37,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396805803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:37,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:37,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:14:37,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482615297] [2021-06-06 00:14:37,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:37,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:37,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:37,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:37,508 INFO L87 Difference]: Start difference. First operand 19795 states and 76886 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-06-06 00:14:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:37,791 INFO L93 Difference]: Finished difference Result 29286 states and 109348 transitions. [2021-06-06 00:14:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:14:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 28 [2021-06-06 00:14:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:37,858 INFO L225 Difference]: With dead ends: 29286 [2021-06-06 00:14:37,858 INFO L226 Difference]: Without dead ends: 29269 [2021-06-06 00:14:37,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:14:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29269 states. [2021-06-06 00:14:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29269 to 20063. [2021-06-06 00:14:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20063 states, 20062 states have (on average 3.8898414913767323) internal successors, (78038), 20062 states have internal predecessors, (78038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20063 states to 20063 states and 78038 transitions. [2021-06-06 00:14:38,307 INFO L78 Accepts]: Start accepts. Automaton has 20063 states and 78038 transitions. Word has length 28 [2021-06-06 00:14:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:38,307 INFO L482 AbstractCegarLoop]: Abstraction has 20063 states and 78038 transitions. [2021-06-06 00:14:38,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-06-06 00:14:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 20063 states and 78038 transitions. [2021-06-06 00:14:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:38,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:38,336 INFO L554 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, 1, 1] [2021-06-06 00:14:38,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4140,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:38,536 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-06 00:14:38,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:38,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862520214] [2021-06-06 00:14:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:38,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862520214] [2021-06-06 00:14:38,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862520214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603680160] [2021-06-06 00:14:38,582 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:38,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:38,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:14:38,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:14:38,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603680160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:38,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:38,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:14:38,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662767403] [2021-06-06 00:14:38,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:38,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:38,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:38,669 INFO L87 Difference]: Start difference. First operand 20063 states and 78038 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-06-06 00:14:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:39,052 INFO L93 Difference]: Finished difference Result 31067 states and 114897 transitions. [2021-06-06 00:14:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:14:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 28 [2021-06-06 00:14:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:39,118 INFO L225 Difference]: With dead ends: 31067 [2021-06-06 00:14:39,118 INFO L226 Difference]: Without dead ends: 31067 [2021-06-06 00:14:39,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:14:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31067 states. [2021-06-06 00:14:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31067 to 19732. [2021-06-06 00:14:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19732 states, 19731 states have (on average 3.874714915615022) internal successors, (76452), 19731 states have internal predecessors, (76452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19732 states to 19732 states and 76452 transitions. [2021-06-06 00:14:39,536 INFO L78 Accepts]: Start accepts. Automaton has 19732 states and 76452 transitions. Word has length 28 [2021-06-06 00:14:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:39,536 INFO L482 AbstractCegarLoop]: Abstraction has 19732 states and 76452 transitions. [2021-06-06 00:14:39,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-06-06 00:14:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 19732 states and 76452 transitions. [2021-06-06 00:14:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:39,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:39,565 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:39,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-06-06 00:14:39,768 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-06 00:14:39,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:39,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330725068] [2021-06-06 00:14:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:39,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330725068] [2021-06-06 00:14:39,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330725068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538085955] [2021-06-06 00:14:39,810 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:39,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:39,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538085955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:39,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:39,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:14:39,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638224219] [2021-06-06 00:14:39,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:39,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:39,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:39,911 INFO L87 Difference]: Start difference. First operand 19732 states and 76452 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:14:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:40,671 INFO L93 Difference]: Finished difference Result 29306 states and 108910 transitions. [2021-06-06 00:14:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:14:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:14:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:40,732 INFO L225 Difference]: With dead ends: 29306 [2021-06-06 00:14:40,732 INFO L226 Difference]: Without dead ends: 29306 [2021-06-06 00:14:40,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:14:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29306 states. [2021-06-06 00:14:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29306 to 19780. [2021-06-06 00:14:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 3.8734010819556093) internal successors, (76612), 19779 states have internal predecessors, (76612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 76612 transitions. [2021-06-06 00:14:41,206 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 76612 transitions. Word has length 28 [2021-06-06 00:14:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:41,206 INFO L482 AbstractCegarLoop]: Abstraction has 19780 states and 76612 transitions. [2021-06-06 00:14:41,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:14:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 76612 transitions. [2021-06-06 00:14:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:41,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:41,238 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:41,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4142 [2021-06-06 00:14:41,438 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-06 00:14:41,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:41,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316331027] [2021-06-06 00:14:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:41,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:41,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316331027] [2021-06-06 00:14:41,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316331027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:41,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210667947] [2021-06-06 00:14:41,476 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:41,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:41,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:41,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:41,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210667947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:41,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:41,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:14:41,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927873084] [2021-06-06 00:14:41,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:41,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:41,574 INFO L87 Difference]: Start difference. First operand 19780 states and 76612 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:14:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:42,554 INFO L93 Difference]: Finished difference Result 30838 states and 113300 transitions. [2021-06-06 00:14:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:14:42,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:14:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:42,736 INFO L225 Difference]: With dead ends: 30838 [2021-06-06 00:14:42,737 INFO L226 Difference]: Without dead ends: 30838 [2021-06-06 00:14:42,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:14:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30838 states. [2021-06-06 00:14:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30838 to 20326. [2021-06-06 00:14:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20326 states, 20325 states have (on average 3.8521525215252153) internal successors, (78295), 20325 states have internal predecessors, (78295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 78295 transitions. [2021-06-06 00:14:43,175 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 78295 transitions. Word has length 28 [2021-06-06 00:14:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:43,175 INFO L482 AbstractCegarLoop]: Abstraction has 20326 states and 78295 transitions. [2021-06-06 00:14:43,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:14:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 78295 transitions. [2021-06-06 00:14:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:43,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:43,203 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:43,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-06 00:14:43,404 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-06 00:14:43,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:43,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777220904] [2021-06-06 00:14:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:43,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:43,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777220904] [2021-06-06 00:14:43,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777220904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:43,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227339131] [2021-06-06 00:14:43,447 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:43,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:14:43,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:43,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:43,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227339131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:43,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:43,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:14:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749590295] [2021-06-06 00:14:43,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:43,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:43,542 INFO L87 Difference]: Start difference. First operand 20326 states and 78295 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:14:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:44,408 INFO L93 Difference]: Finished difference Result 29955 states and 110977 transitions. [2021-06-06 00:14:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:14:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:14:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:44,470 INFO L225 Difference]: With dead ends: 29955 [2021-06-06 00:14:44,471 INFO L226 Difference]: Without dead ends: 29951 [2021-06-06 00:14:44,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:14:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2021-06-06 00:14:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 20218. [2021-06-06 00:14:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20218 states, 20217 states have (on average 3.854825147153386) internal successors, (77933), 20217 states have internal predecessors, (77933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20218 states to 20218 states and 77933 transitions. [2021-06-06 00:14:44,957 INFO L78 Accepts]: Start accepts. Automaton has 20218 states and 77933 transitions. Word has length 28 [2021-06-06 00:14:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:44,958 INFO L482 AbstractCegarLoop]: Abstraction has 20218 states and 77933 transitions. [2021-06-06 00:14:44,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:14:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20218 states and 77933 transitions. [2021-06-06 00:14:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:44,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:44,986 INFO L554 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, 1, 1] [2021-06-06 00:14:45,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-06-06 00:14:45,187 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:45,187 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-06 00:14:45,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:45,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225460672] [2021-06-06 00:14:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:45,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225460672] [2021-06-06 00:14:45,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225460672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139872015] [2021-06-06 00:14:45,215 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:45,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:14:45,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:14:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:14:45,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139872015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:45,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:45,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:14:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132015106] [2021-06-06 00:14:45,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:14:45,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:14:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:14:45,293 INFO L87 Difference]: Start difference. First operand 20218 states and 77933 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:45,517 INFO L93 Difference]: Finished difference Result 25214 states and 93817 transitions. [2021-06-06 00:14:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:14:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:45,572 INFO L225 Difference]: With dead ends: 25214 [2021-06-06 00:14:45,573 INFO L226 Difference]: Without dead ends: 25214 [2021-06-06 00:14:45,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:14:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25214 states. [2021-06-06 00:14:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25214 to 20528. [2021-06-06 00:14:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20528 states, 20527 states have (on average 3.8459589808544843) internal successors, (78946), 20527 states have internal predecessors, (78946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20528 states to 20528 states and 78946 transitions. [2021-06-06 00:14:46,049 INFO L78 Accepts]: Start accepts. Automaton has 20528 states and 78946 transitions. Word has length 28 [2021-06-06 00:14:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:46,049 INFO L482 AbstractCegarLoop]: Abstraction has 20528 states and 78946 transitions. [2021-06-06 00:14:46,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20528 states and 78946 transitions. [2021-06-06 00:14:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:46,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:46,078 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:46,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4145 [2021-06-06 00:14:46,279 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:46,279 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-06 00:14:46,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:46,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097514482] [2021-06-06 00:14:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:46,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:46,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097514482] [2021-06-06 00:14:46,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097514482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:46,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324212009] [2021-06-06 00:14:46,331 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:14:46,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324212009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:46,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:46,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:14:46,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235689507] [2021-06-06 00:14:46,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:46,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:46,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:46,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:46,436 INFO L87 Difference]: Start difference. First operand 20528 states and 78946 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:47,276 INFO L93 Difference]: Finished difference Result 30964 states and 113417 transitions. [2021-06-06 00:14:47,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:14:47,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:47,344 INFO L225 Difference]: With dead ends: 30964 [2021-06-06 00:14:47,344 INFO L226 Difference]: Without dead ends: 30964 [2021-06-06 00:14:47,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 457.0ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:14:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30964 states. [2021-06-06 00:14:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30964 to 22146. [2021-06-06 00:14:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22146 states, 22145 states have (on average 3.8581169564235718) internal successors, (85438), 22145 states have internal predecessors, (85438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22146 states to 22146 states and 85438 transitions. [2021-06-06 00:14:47,853 INFO L78 Accepts]: Start accepts. Automaton has 22146 states and 85438 transitions. Word has length 28 [2021-06-06 00:14:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:47,853 INFO L482 AbstractCegarLoop]: Abstraction has 22146 states and 85438 transitions. [2021-06-06 00:14:47,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22146 states and 85438 transitions. [2021-06-06 00:14:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:47,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:47,886 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:48,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4146,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:48,086 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-06 00:14:48,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:48,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483620210] [2021-06-06 00:14:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:48,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:48,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483620210] [2021-06-06 00:14:48,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483620210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:48,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511527768] [2021-06-06 00:14:48,123 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:48,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:48,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:48,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:14:48,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511527768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:48,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:48,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:14:48,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973563407] [2021-06-06 00:14:48,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:48,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:48,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:48,240 INFO L87 Difference]: Start difference. First operand 22146 states and 85438 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:48,950 INFO L93 Difference]: Finished difference Result 29203 states and 108883 transitions. [2021-06-06 00:14:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:14:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:49,011 INFO L225 Difference]: With dead ends: 29203 [2021-06-06 00:14:49,011 INFO L226 Difference]: Without dead ends: 29191 [2021-06-06 00:14:49,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:14:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2021-06-06 00:14:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 22298. [2021-06-06 00:14:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22298 states, 22297 states have (on average 3.8527156119657353) internal successors, (85904), 22297 states have internal predecessors, (85904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22298 states to 22298 states and 85904 transitions. [2021-06-06 00:14:49,674 INFO L78 Accepts]: Start accepts. Automaton has 22298 states and 85904 transitions. Word has length 28 [2021-06-06 00:14:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:49,674 INFO L482 AbstractCegarLoop]: Abstraction has 22298 states and 85904 transitions. [2021-06-06 00:14:49,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 22298 states and 85904 transitions. [2021-06-06 00:14:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:49,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:49,710 INFO L554 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, 1, 1] [2021-06-06 00:14:49,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4147,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:49,911 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:49,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-06 00:14:49,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:49,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441162259] [2021-06-06 00:14:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:49,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:49,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441162259] [2021-06-06 00:14:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441162259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:49,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97293644] [2021-06-06 00:14:49,942 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:49,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:14:49,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:14:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:50,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97293644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:50,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:50,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:14:50,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280572065] [2021-06-06 00:14:50,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:14:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:14:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:14:50,028 INFO L87 Difference]: Start difference. First operand 22298 states and 85904 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-06 00:14:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:50,293 INFO L93 Difference]: Finished difference Result 25557 states and 96861 transitions. [2021-06-06 00:14:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:14:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-06-06 00:14:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:50,356 INFO L225 Difference]: With dead ends: 25557 [2021-06-06 00:14:50,357 INFO L226 Difference]: Without dead ends: 25557 [2021-06-06 00:14:50,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:14:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25557 states. [2021-06-06 00:14:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25557 to 23101. [2021-06-06 00:14:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23101 states, 23100 states have (on average 3.847748917748918) internal successors, (88883), 23100 states have internal predecessors, (88883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23101 states to 23101 states and 88883 transitions. [2021-06-06 00:14:50,841 INFO L78 Accepts]: Start accepts. Automaton has 23101 states and 88883 transitions. Word has length 28 [2021-06-06 00:14:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:50,841 INFO L482 AbstractCegarLoop]: Abstraction has 23101 states and 88883 transitions. [2021-06-06 00:14:50,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-06 00:14:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23101 states and 88883 transitions. [2021-06-06 00:14:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:50,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:50,877 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:51,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4148 [2021-06-06 00:14:51,086 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-06 00:14:51,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:51,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344903853] [2021-06-06 00:14:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:51,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:51,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344903853] [2021-06-06 00:14:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344903853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:51,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980668499] [2021-06-06 00:14:51,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:51,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:51,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:51,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980668499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:51,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:51,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:14:51,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674489870] [2021-06-06 00:14:51,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:51,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:51,245 INFO L87 Difference]: Start difference. First operand 23101 states and 88883 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:52,020 INFO L93 Difference]: Finished difference Result 30944 states and 114247 transitions. [2021-06-06 00:14:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:14:52,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:14:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:52,088 INFO L225 Difference]: With dead ends: 30944 [2021-06-06 00:14:52,089 INFO L226 Difference]: Without dead ends: 30944 [2021-06-06 00:14:52,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:14:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30944 states. [2021-06-06 00:14:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30944 to 24307. [2021-06-06 00:14:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24307 states, 24306 states have (on average 3.8156010861515677) internal successors, (92742), 24306 states have internal predecessors, (92742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24307 states to 24307 states and 92742 transitions. [2021-06-06 00:14:52,639 INFO L78 Accepts]: Start accepts. Automaton has 24307 states and 92742 transitions. Word has length 28 [2021-06-06 00:14:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:52,639 INFO L482 AbstractCegarLoop]: Abstraction has 24307 states and 92742 transitions. [2021-06-06 00:14:52,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 24307 states and 92742 transitions. [2021-06-06 00:14:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:52,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:52,676 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:52,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:52,876 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-06 00:14:52,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:52,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874640528] [2021-06-06 00:14:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:52,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874640528] [2021-06-06 00:14:52,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874640528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209232531] [2021-06-06 00:14:52,910 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:52,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:14:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:52,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209232531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:52,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:52,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:52,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744468195] [2021-06-06 00:14:52,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:52,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:52,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:52,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:52,991 INFO L87 Difference]: Start difference. First operand 24307 states and 92742 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) [2021-06-06 00:14:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:53,570 INFO L93 Difference]: Finished difference Result 30042 states and 111856 transitions. [2021-06-06 00:14:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:14:53,570 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 28 [2021-06-06 00:14:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:53,641 INFO L225 Difference]: With dead ends: 30042 [2021-06-06 00:14:53,641 INFO L226 Difference]: Without dead ends: 30034 [2021-06-06 00:14:53,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:14:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30034 states. [2021-06-06 00:14:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30034 to 24129. [2021-06-06 00:14:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24129 states, 24128 states have (on average 3.821742374005305) internal successors, (92211), 24128 states have internal predecessors, (92211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24129 states to 24129 states and 92211 transitions. [2021-06-06 00:14:54,238 INFO L78 Accepts]: Start accepts. Automaton has 24129 states and 92211 transitions. Word has length 28 [2021-06-06 00:14:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:54,238 INFO L482 AbstractCegarLoop]: Abstraction has 24129 states and 92211 transitions. [2021-06-06 00:14:54,238 INFO L483 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) [2021-06-06 00:14:54,238 INFO L276 IsEmpty]: Start isEmpty. Operand 24129 states and 92211 transitions. [2021-06-06 00:14:54,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:54,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:54,275 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:54,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-06-06 00:14:54,475 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-06 00:14:54,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:54,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468076939] [2021-06-06 00:14:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:54,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:54,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468076939] [2021-06-06 00:14:54,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468076939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:54,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071296674] [2021-06-06 00:14:54,507 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:54,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:14:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:54,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071296674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:54,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:54,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:54,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622640961] [2021-06-06 00:14:54,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:54,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:54,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:54,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:54,611 INFO L87 Difference]: Start difference. First operand 24129 states and 92211 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) [2021-06-06 00:14:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:55,338 INFO L93 Difference]: Finished difference Result 31875 states and 117476 transitions. [2021-06-06 00:14:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:14:55,338 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 28 [2021-06-06 00:14:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:55,408 INFO L225 Difference]: With dead ends: 31875 [2021-06-06 00:14:55,408 INFO L226 Difference]: Without dead ends: 31875 [2021-06-06 00:14:55,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:14:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-06-06 00:14:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 25163. [2021-06-06 00:14:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25163 states, 25162 states have (on average 3.797631348859391) internal successors, (95556), 25162 states have internal predecessors, (95556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25163 states to 25163 states and 95556 transitions. [2021-06-06 00:14:55,973 INFO L78 Accepts]: Start accepts. Automaton has 25163 states and 95556 transitions. Word has length 28 [2021-06-06 00:14:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:55,973 INFO L482 AbstractCegarLoop]: Abstraction has 25163 states and 95556 transitions. [2021-06-06 00:14:55,973 INFO L483 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) [2021-06-06 00:14:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 25163 states and 95556 transitions. [2021-06-06 00:14:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:56,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:56,008 INFO L554 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, 1, 1] [2021-06-06 00:14:56,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4151 [2021-06-06 00:14:56,209 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-06 00:14:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488044688] [2021-06-06 00:14:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:56,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488044688] [2021-06-06 00:14:56,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488044688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523232303] [2021-06-06 00:14:56,244 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:56,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523232303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:56,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:56,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:14:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119154333] [2021-06-06 00:14:56,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:56,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:56,316 INFO L87 Difference]: Start difference. First operand 25163 states and 95556 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:56,655 INFO L93 Difference]: Finished difference Result 30826 states and 116166 transitions. [2021-06-06 00:14:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:14:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:56,726 INFO L225 Difference]: With dead ends: 30826 [2021-06-06 00:14:56,726 INFO L226 Difference]: Without dead ends: 30813 [2021-06-06 00:14:56,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:14:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30813 states. [2021-06-06 00:14:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30813 to 29259. [2021-06-06 00:14:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 3.81594777496753) internal successors, (111647), 29258 states have internal predecessors, (111647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 111647 transitions. [2021-06-06 00:14:57,501 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 111647 transitions. Word has length 28 [2021-06-06 00:14:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:57,501 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 111647 transitions. [2021-06-06 00:14:57,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 111647 transitions. [2021-06-06 00:14:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:57,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:57,554 INFO L554 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, 1, 1] [2021-06-06 00:14:57,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4152,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:57,754 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:57,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-06 00:14:57,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:57,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917955577] [2021-06-06 00:14:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:57,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:57,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917955577] [2021-06-06 00:14:57,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917955577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:57,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308445895] [2021-06-06 00:14:57,798 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:57,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:57,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:57,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308445895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:57,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:57,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:14:57,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011402605] [2021-06-06 00:14:57,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:57,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:57,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:57,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:57,874 INFO L87 Difference]: Start difference. First operand 29259 states and 111647 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:58,249 INFO L93 Difference]: Finished difference Result 32262 states and 120978 transitions. [2021-06-06 00:14:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:14:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:58,325 INFO L225 Difference]: With dead ends: 32262 [2021-06-06 00:14:58,325 INFO L226 Difference]: Without dead ends: 32262 [2021-06-06 00:14:58,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:14:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32262 states. [2021-06-06 00:14:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32262 to 29004. [2021-06-06 00:14:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29004 states, 29003 states have (on average 3.8122952797986414) internal successors, (110568), 29003 states have internal predecessors, (110568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29004 states to 29004 states and 110568 transitions. [2021-06-06 00:14:59,150 INFO L78 Accepts]: Start accepts. Automaton has 29004 states and 110568 transitions. Word has length 28 [2021-06-06 00:14:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:59,150 INFO L482 AbstractCegarLoop]: Abstraction has 29004 states and 110568 transitions. [2021-06-06 00:14:59,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 29004 states and 110568 transitions. [2021-06-06 00:14:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:59,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:59,195 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:59,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4153 [2021-06-06 00:14:59,396 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:59,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:59,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-06 00:14:59,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:59,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077806953] [2021-06-06 00:14:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:59,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:59,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077806953] [2021-06-06 00:14:59,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077806953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:59,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168945187] [2021-06-06 00:14:59,654 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:59,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:59,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:59,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:59,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168945187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:59,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:59,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:59,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658218365] [2021-06-06 00:14:59,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:59,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:59,751 INFO L87 Difference]: Start difference. First operand 29004 states and 110568 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) [2021-06-06 00:15:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:00,467 INFO L93 Difference]: Finished difference Result 35430 states and 131896 transitions. [2021-06-06 00:15:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:15:00,467 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 28 [2021-06-06 00:15:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:00,557 INFO L225 Difference]: With dead ends: 35430 [2021-06-06 00:15:00,558 INFO L226 Difference]: Without dead ends: 35422 [2021-06-06 00:15:00,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:15:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-06-06 00:15:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28970. [2021-06-06 00:15:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28970 states, 28969 states have (on average 3.8127308502191997) internal successors, (110451), 28969 states have internal predecessors, (110451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28970 states to 28970 states and 110451 transitions. [2021-06-06 00:15:01,409 INFO L78 Accepts]: Start accepts. Automaton has 28970 states and 110451 transitions. Word has length 28 [2021-06-06 00:15:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:01,409 INFO L482 AbstractCegarLoop]: Abstraction has 28970 states and 110451 transitions. [2021-06-06 00:15:01,409 INFO L483 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) [2021-06-06 00:15:01,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28970 states and 110451 transitions. [2021-06-06 00:15:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:01,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:01,454 INFO L554 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, 1, 1] [2021-06-06 00:15:01,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4154,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:01,655 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:01,655 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-06 00:15:01,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:01,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373981940] [2021-06-06 00:15:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:01,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373981940] [2021-06-06 00:15:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373981940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265696567] [2021-06-06 00:15:01,696 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:01,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:01,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:01,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265696567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:01,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:01,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:15:01,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991369190] [2021-06-06 00:15:01,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:15:01,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:15:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:15:01,788 INFO L87 Difference]: Start difference. First operand 28970 states and 110451 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:02,398 INFO L93 Difference]: Finished difference Result 31816 states and 119913 transitions. [2021-06-06 00:15:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:15:02,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:02,481 INFO L225 Difference]: With dead ends: 31816 [2021-06-06 00:15:02,481 INFO L226 Difference]: Without dead ends: 31816 [2021-06-06 00:15:02,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:15:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31816 states. [2021-06-06 00:15:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31816 to 29502. [2021-06-06 00:15:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29502 states, 29501 states have (on average 3.8112267380766753) internal successors, (112435), 29501 states have internal predecessors, (112435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29502 states to 29502 states and 112435 transitions. [2021-06-06 00:15:03,268 INFO L78 Accepts]: Start accepts. Automaton has 29502 states and 112435 transitions. Word has length 28 [2021-06-06 00:15:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:03,268 INFO L482 AbstractCegarLoop]: Abstraction has 29502 states and 112435 transitions. [2021-06-06 00:15:03,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 29502 states and 112435 transitions. [2021-06-06 00:15:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:03,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:03,457 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:03,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-06-06 00:15:03,673 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-06 00:15:03,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:03,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018727725] [2021-06-06 00:15:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:03,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:03,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018727725] [2021-06-06 00:15:03,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018727725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:03,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301997399] [2021-06-06 00:15:03,716 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:03,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:15:03,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:03,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301997399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:03,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:03,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:15:03,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306607796] [2021-06-06 00:15:03,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:03,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:03,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:03,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:03,798 INFO L87 Difference]: Start difference. First operand 29502 states and 112435 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) [2021-06-06 00:15:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:04,506 INFO L93 Difference]: Finished difference Result 36375 states and 135365 transitions. [2021-06-06 00:15:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:15:04,506 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 28 [2021-06-06 00:15:04,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:04,597 INFO L225 Difference]: With dead ends: 36375 [2021-06-06 00:15:04,597 INFO L226 Difference]: Without dead ends: 36351 [2021-06-06 00:15:04,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:15:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36351 states. [2021-06-06 00:15:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36351 to 29684. [2021-06-06 00:15:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29684 states, 29683 states have (on average 3.806960212916484) internal successors, (113002), 29683 states have internal predecessors, (113002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29684 states to 29684 states and 113002 transitions. [2021-06-06 00:15:05,427 INFO L78 Accepts]: Start accepts. Automaton has 29684 states and 113002 transitions. Word has length 28 [2021-06-06 00:15:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:05,427 INFO L482 AbstractCegarLoop]: Abstraction has 29684 states and 113002 transitions. [2021-06-06 00:15:05,427 INFO L483 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) [2021-06-06 00:15:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 29684 states and 113002 transitions. [2021-06-06 00:15:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:05,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:05,482 INFO L554 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, 1, 1] [2021-06-06 00:15:05,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4156 [2021-06-06 00:15:05,683 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:05,683 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-06 00:15:05,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:05,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450406830] [2021-06-06 00:15:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:05,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450406830] [2021-06-06 00:15:05,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450406830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998821869] [2021-06-06 00:15:05,744 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:05,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:15:05,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:05,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998821869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:05,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:05,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-06 00:15:05,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201223972] [2021-06-06 00:15:05,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:05,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:05,842 INFO L87 Difference]: Start difference. First operand 29684 states and 113002 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:06,552 INFO L93 Difference]: Finished difference Result 32240 states and 121414 transitions. [2021-06-06 00:15:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:15:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:06,637 INFO L225 Difference]: With dead ends: 32240 [2021-06-06 00:15:06,637 INFO L226 Difference]: Without dead ends: 32240 [2021-06-06 00:15:06,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:15:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-06-06 00:15:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 29610. [2021-06-06 00:15:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29610 states, 29609 states have (on average 3.8078287007328853) internal successors, (112746), 29609 states have internal predecessors, (112746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29610 states to 29610 states and 112746 transitions. [2021-06-06 00:15:07,417 INFO L78 Accepts]: Start accepts. Automaton has 29610 states and 112746 transitions. Word has length 28 [2021-06-06 00:15:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:07,417 INFO L482 AbstractCegarLoop]: Abstraction has 29610 states and 112746 transitions. [2021-06-06 00:15:07,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29610 states and 112746 transitions. [2021-06-06 00:15:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:07,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:07,468 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:07,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:07,668 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-06 00:15:07,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:07,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93632951] [2021-06-06 00:15:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:07,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93632951] [2021-06-06 00:15:07,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93632951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318494655] [2021-06-06 00:15:07,711 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:07,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318494655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:07,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:07,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:15:07,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987074981] [2021-06-06 00:15:07,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:07,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:07,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:07,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:07,798 INFO L87 Difference]: Start difference. First operand 29610 states and 112746 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:15:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:08,639 INFO L93 Difference]: Finished difference Result 36298 states and 135106 transitions. [2021-06-06 00:15:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:15:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:15:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:08,729 INFO L225 Difference]: With dead ends: 36298 [2021-06-06 00:15:08,729 INFO L226 Difference]: Without dead ends: 36258 [2021-06-06 00:15:08,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:15:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36258 states. [2021-06-06 00:15:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36258 to 29776. [2021-06-06 00:15:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29776 states, 29775 states have (on average 3.803761544920235) internal successors, (113257), 29775 states have internal predecessors, (113257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29776 states to 29776 states and 113257 transitions. [2021-06-06 00:15:09,797 INFO L78 Accepts]: Start accepts. Automaton has 29776 states and 113257 transitions. Word has length 28 [2021-06-06 00:15:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:09,797 INFO L482 AbstractCegarLoop]: Abstraction has 29776 states and 113257 transitions. [2021-06-06 00:15:09,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:15:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 29776 states and 113257 transitions. [2021-06-06 00:15:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:09,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:09,848 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:10,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4158,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:10,048 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-06 00:15:10,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:10,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577953478] [2021-06-06 00:15:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:10,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:10,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577953478] [2021-06-06 00:15:10,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577953478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:10,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13940307] [2021-06-06 00:15:10,082 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:10,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:10,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:10,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13940307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:10,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:10,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:10,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362180081] [2021-06-06 00:15:10,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:10,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:10,208 INFO L87 Difference]: Start difference. First operand 29776 states and 113257 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:11,664 INFO L93 Difference]: Finished difference Result 68142 states and 250877 transitions. [2021-06-06 00:15:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:15:11,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:11,836 INFO L225 Difference]: With dead ends: 68142 [2021-06-06 00:15:11,836 INFO L226 Difference]: Without dead ends: 68142 [2021-06-06 00:15:11,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:15:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68142 states. [2021-06-06 00:15:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68142 to 37503. [2021-06-06 00:15:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37503 states, 37502 states have (on average 3.8855527705189057) internal successors, (145716), 37502 states have internal predecessors, (145716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37503 states to 37503 states and 145716 transitions. [2021-06-06 00:15:13,322 INFO L78 Accepts]: Start accepts. Automaton has 37503 states and 145716 transitions. Word has length 28 [2021-06-06 00:15:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:13,322 INFO L482 AbstractCegarLoop]: Abstraction has 37503 states and 145716 transitions. [2021-06-06 00:15:13,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 37503 states and 145716 transitions. [2021-06-06 00:15:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:13,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:13,396 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:13,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4159,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:13,597 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-06 00:15:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:13,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273481487] [2021-06-06 00:15:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:13,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:13,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273481487] [2021-06-06 00:15:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273481487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:13,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910088531] [2021-06-06 00:15:13,633 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:13,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:15:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:13,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910088531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:13,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:13,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:13,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704212024] [2021-06-06 00:15:13,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:13,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:13,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:13,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:13,771 INFO L87 Difference]: Start difference. First operand 37503 states and 145716 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:15,316 INFO L93 Difference]: Finished difference Result 67515 states and 249216 transitions. [2021-06-06 00:15:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:15:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:15,493 INFO L225 Difference]: With dead ends: 67515 [2021-06-06 00:15:15,493 INFO L226 Difference]: Without dead ends: 67515 [2021-06-06 00:15:15,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 892.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:15:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-06-06 00:15:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 37500. [2021-06-06 00:15:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37500 states, 37499 states have (on average 3.885490279740793) internal successors, (145702), 37499 states have internal predecessors, (145702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37500 states to 37500 states and 145702 transitions. [2021-06-06 00:15:16,970 INFO L78 Accepts]: Start accepts. Automaton has 37500 states and 145702 transitions. Word has length 28 [2021-06-06 00:15:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:16,970 INFO L482 AbstractCegarLoop]: Abstraction has 37500 states and 145702 transitions. [2021-06-06 00:15:16,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 37500 states and 145702 transitions. [2021-06-06 00:15:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:17,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:17,029 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:17,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4160 [2021-06-06 00:15:17,229 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-06 00:15:17,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:17,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655450682] [2021-06-06 00:15:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:17,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655450682] [2021-06-06 00:15:17,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655450682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319087988] [2021-06-06 00:15:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:17,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:17,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:17,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:17,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319087988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:17,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:17,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:15:17,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407743428] [2021-06-06 00:15:17,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:15:17,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:17,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:15:17,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:15:17,383 INFO L87 Difference]: Start difference. First operand 37500 states and 145702 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:18,772 INFO L93 Difference]: Finished difference Result 62937 states and 233716 transitions. [2021-06-06 00:15:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:15:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:15:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:18,954 INFO L225 Difference]: With dead ends: 62937 [2021-06-06 00:15:18,954 INFO L226 Difference]: Without dead ends: 62937 [2021-06-06 00:15:18,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:15:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62937 states. [2021-06-06 00:15:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62937 to 37524. [2021-06-06 00:15:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885830024251792) internal successors, (145808), 37523 states have internal predecessors, (145808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145808 transitions. [2021-06-06 00:15:20,435 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145808 transitions. Word has length 28 [2021-06-06 00:15:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:20,435 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145808 transitions. [2021-06-06 00:15:20,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145808 transitions. [2021-06-06 00:15:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:20,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:20,763 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:20,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4161 [2021-06-06 00:15:20,965 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-06 00:15:20,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:20,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797013691] [2021-06-06 00:15:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:20,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:20,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797013691] [2021-06-06 00:15:20,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797013691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:20,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151290942] [2021-06-06 00:15:20,997 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:21,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:15:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:21,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151290942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:21,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:21,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:15:21,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143826517] [2021-06-06 00:15:21,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:15:21,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:21,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:15:21,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:15:21,108 INFO L87 Difference]: Start difference. First operand 37524 states and 145808 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:22,210 INFO L93 Difference]: Finished difference Result 62070 states and 231476 transitions. [2021-06-06 00:15:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:15:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:15:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:22,374 INFO L225 Difference]: With dead ends: 62070 [2021-06-06 00:15:22,374 INFO L226 Difference]: Without dead ends: 62062 [2021-06-06 00:15:22,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 505.0ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:15:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62062 states. [2021-06-06 00:15:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62062 to 37524. [2021-06-06 00:15:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885670122324974) internal successors, (145802), 37523 states have internal predecessors, (145802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145802 transitions. [2021-06-06 00:15:23,824 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145802 transitions. Word has length 28 [2021-06-06 00:15:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:23,824 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145802 transitions. [2021-06-06 00:15:23,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145802 transitions. [2021-06-06 00:15:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:23,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:23,888 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:24,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4162,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:24,089 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-06 00:15:24,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:24,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567594553] [2021-06-06 00:15:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:24,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:24,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567594553] [2021-06-06 00:15:24,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567594553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:24,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364000359] [2021-06-06 00:15:24,124 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:24,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:15:24,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:24,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:24,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364000359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:24,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:24,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:24,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470155107] [2021-06-06 00:15:24,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:24,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:24,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:24,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:24,259 INFO L87 Difference]: Start difference. First operand 37524 states and 145802 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) [2021-06-06 00:15:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:25,763 INFO L93 Difference]: Finished difference Result 61748 states and 230607 transitions. [2021-06-06 00:15:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:15:25,763 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 28 [2021-06-06 00:15:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:25,926 INFO L225 Difference]: With dead ends: 61748 [2021-06-06 00:15:25,926 INFO L226 Difference]: Without dead ends: 61748 [2021-06-06 00:15:25,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:15:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61748 states. [2021-06-06 00:15:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61748 to 37532. [2021-06-06 00:15:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.8857477818336843) internal successors, (145836), 37531 states have internal predecessors, (145836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145836 transitions. [2021-06-06 00:15:27,241 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145836 transitions. Word has length 28 [2021-06-06 00:15:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:27,241 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145836 transitions. [2021-06-06 00:15:27,241 INFO L483 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) [2021-06-06 00:15:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145836 transitions. [2021-06-06 00:15:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:27,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:27,301 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:27,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-06-06 00:15:27,502 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-06 00:15:27,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:27,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732809827] [2021-06-06 00:15:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:27,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:27,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732809827] [2021-06-06 00:15:27,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732809827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:27,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975046250] [2021-06-06 00:15:27,534 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:27,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:27,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975046250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:27,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:27,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:27,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207924214] [2021-06-06 00:15:27,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:27,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:27,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:27,652 INFO L87 Difference]: Start difference. First operand 37532 states and 145836 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) [2021-06-06 00:15:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:28,969 INFO L93 Difference]: Finished difference Result 61537 states and 230081 transitions. [2021-06-06 00:15:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:15:28,970 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 28 [2021-06-06 00:15:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:29,155 INFO L225 Difference]: With dead ends: 61537 [2021-06-06 00:15:29,155 INFO L226 Difference]: Without dead ends: 61529 [2021-06-06 00:15:29,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:15:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61529 states. [2021-06-06 00:15:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61529 to 37532. [2021-06-06 00:15:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.885694492552823) internal successors, (145834), 37531 states have internal predecessors, (145834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145834 transitions. [2021-06-06 00:15:30,760 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145834 transitions. Word has length 28 [2021-06-06 00:15:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:30,760 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145834 transitions. [2021-06-06 00:15:30,760 INFO L483 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) [2021-06-06 00:15:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145834 transitions. [2021-06-06 00:15:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:31,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:31,056 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:31,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4164,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:31,257 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:31,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-06 00:15:31,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:31,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179275881] [2021-06-06 00:15:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:31,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:31,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179275881] [2021-06-06 00:15:31,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179275881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:31,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440323099] [2021-06-06 00:15:31,289 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:31,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:31,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440323099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:31,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:31,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:15:31,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333777417] [2021-06-06 00:15:31,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:31,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:31,398 INFO L87 Difference]: Start difference. First operand 37532 states and 145834 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:32,604 INFO L93 Difference]: Finished difference Result 60940 states and 226561 transitions. [2021-06-06 00:15:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:15:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:32,771 INFO L225 Difference]: With dead ends: 60940 [2021-06-06 00:15:32,772 INFO L226 Difference]: Without dead ends: 60940 [2021-06-06 00:15:32,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:15:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60940 states. [2021-06-06 00:15:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60940 to 40347. [2021-06-06 00:15:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40347 states, 40346 states have (on average 3.8897040598820207) internal successors, (156934), 40346 states have internal predecessors, (156934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40347 states to 40347 states and 156934 transitions. [2021-06-06 00:15:34,206 INFO L78 Accepts]: Start accepts. Automaton has 40347 states and 156934 transitions. Word has length 28 [2021-06-06 00:15:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:34,206 INFO L482 AbstractCegarLoop]: Abstraction has 40347 states and 156934 transitions. [2021-06-06 00:15:34,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 40347 states and 156934 transitions. [2021-06-06 00:15:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:34,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:34,277 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:34,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4165 [2021-06-06 00:15:34,497 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:34,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-06 00:15:34,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:34,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914541651] [2021-06-06 00:15:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:34,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:34,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914541651] [2021-06-06 00:15:34,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914541651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:34,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062907575] [2021-06-06 00:15:34,531 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:34,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:15:34,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:34,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062907575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:34,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:34,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:15:34,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76433232] [2021-06-06 00:15:34,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:34,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:34,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:34,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:34,632 INFO L87 Difference]: Start difference. First operand 40347 states and 156934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:35,678 INFO L93 Difference]: Finished difference Result 60463 states and 225303 transitions. [2021-06-06 00:15:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:15:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:36,197 INFO L225 Difference]: With dead ends: 60463 [2021-06-06 00:15:36,197 INFO L226 Difference]: Without dead ends: 60455 [2021-06-06 00:15:36,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:15:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60455 states. [2021-06-06 00:15:37,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60455 to 40063. [2021-06-06 00:15:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40063 states, 40062 states have (on average 3.8951125755079627) internal successors, (156046), 40062 states have internal predecessors, (156046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40063 states to 40063 states and 156046 transitions. [2021-06-06 00:15:37,625 INFO L78 Accepts]: Start accepts. Automaton has 40063 states and 156046 transitions. Word has length 28 [2021-06-06 00:15:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:37,625 INFO L482 AbstractCegarLoop]: Abstraction has 40063 states and 156046 transitions. [2021-06-06 00:15:37,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 40063 states and 156046 transitions. [2021-06-06 00:15:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:37,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:37,689 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:37,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4166 [2021-06-06 00:15:37,890 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-06 00:15:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:37,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61986035] [2021-06-06 00:15:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:37,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:37,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61986035] [2021-06-06 00:15:37,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61986035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:37,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186880293] [2021-06-06 00:15:37,924 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:37,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:37,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186880293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:38,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:38,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:15:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052614090] [2021-06-06 00:15:38,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:38,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:38,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:38,025 INFO L87 Difference]: Start difference. First operand 40063 states and 156046 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:38,846 INFO L93 Difference]: Finished difference Result 59012 states and 221313 transitions. [2021-06-06 00:15:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:15:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:39,387 INFO L225 Difference]: With dead ends: 59012 [2021-06-06 00:15:39,388 INFO L226 Difference]: Without dead ends: 58988 [2021-06-06 00:15:39,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:15:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58988 states. [2021-06-06 00:15:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58988 to 39973. [2021-06-06 00:15:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39973 states, 39972 states have (on average 3.8949514660262183) internal successors, (155689), 39972 states have internal predecessors, (155689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39973 states to 39973 states and 155689 transitions. [2021-06-06 00:15:40,692 INFO L78 Accepts]: Start accepts. Automaton has 39973 states and 155689 transitions. Word has length 28 [2021-06-06 00:15:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:40,692 INFO L482 AbstractCegarLoop]: Abstraction has 39973 states and 155689 transitions. [2021-06-06 00:15:40,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 39973 states and 155689 transitions. [2021-06-06 00:15:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:40,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:40,752 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:40,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-06 00:15:40,953 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-06 00:15:40,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587883240] [2021-06-06 00:15:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:40,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587883240] [2021-06-06 00:15:40,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587883240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913683315] [2021-06-06 00:15:40,987 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:41,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:15:41,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:41,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:41,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913683315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:41,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:41,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929907013] [2021-06-06 00:15:41,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:41,111 INFO L87 Difference]: Start difference. First operand 39973 states and 155689 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) [2021-06-06 00:15:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:42,597 INFO L93 Difference]: Finished difference Result 60251 states and 224712 transitions. [2021-06-06 00:15:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:15:42,598 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 28 [2021-06-06 00:15:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:42,769 INFO L225 Difference]: With dead ends: 60251 [2021-06-06 00:15:42,769 INFO L226 Difference]: Without dead ends: 60251 [2021-06-06 00:15:42,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:15:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60251 states. [2021-06-06 00:15:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60251 to 40069. [2021-06-06 00:15:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40069 states, 40068 states have (on average 3.8934561245882002) internal successors, (156003), 40068 states have internal predecessors, (156003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40069 states to 40069 states and 156003 transitions. [2021-06-06 00:15:44,181 INFO L78 Accepts]: Start accepts. Automaton has 40069 states and 156003 transitions. Word has length 28 [2021-06-06 00:15:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:44,182 INFO L482 AbstractCegarLoop]: Abstraction has 40069 states and 156003 transitions. [2021-06-06 00:15:44,182 INFO L483 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) [2021-06-06 00:15:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 40069 states and 156003 transitions. [2021-06-06 00:15:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:44,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:44,244 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:44,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4168,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:44,445 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-06 00:15:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:44,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979769773] [2021-06-06 00:15:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:44,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:44,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979769773] [2021-06-06 00:15:44,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979769773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:44,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168708076] [2021-06-06 00:15:44,480 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:44,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:15:44,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:44,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:44,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168708076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:44,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:44,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:44,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423839234] [2021-06-06 00:15:44,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:44,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:44,600 INFO L87 Difference]: Start difference. First operand 40069 states and 156003 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) [2021-06-06 00:15:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:45,905 INFO L93 Difference]: Finished difference Result 59938 states and 223824 transitions. [2021-06-06 00:15:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:15:45,906 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 28 [2021-06-06 00:15:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:46,111 INFO L225 Difference]: With dead ends: 59938 [2021-06-06 00:15:46,111 INFO L226 Difference]: Without dead ends: 59930 [2021-06-06 00:15:46,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:15:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59930 states. [2021-06-06 00:15:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59930 to 40001. [2021-06-06 00:15:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40001 states, 40000 states have (on average 3.894775) internal successors, (155791), 40000 states have internal predecessors, (155791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40001 states to 40001 states and 155791 transitions. [2021-06-06 00:15:47,683 INFO L78 Accepts]: Start accepts. Automaton has 40001 states and 155791 transitions. Word has length 28 [2021-06-06 00:15:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:47,683 INFO L482 AbstractCegarLoop]: Abstraction has 40001 states and 155791 transitions. [2021-06-06 00:15:47,683 INFO L483 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) [2021-06-06 00:15:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 40001 states and 155791 transitions. [2021-06-06 00:15:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:47,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:47,747 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:47,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:47,947 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:47,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-06 00:15:47,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:47,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914684338] [2021-06-06 00:15:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:47,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914684338] [2021-06-06 00:15:47,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914684338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617241553] [2021-06-06 00:15:47,981 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:48,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617241553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:48,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:48,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:15:48,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117626928] [2021-06-06 00:15:48,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:15:48,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:15:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:15:48,088 INFO L87 Difference]: Start difference. First operand 40001 states and 155791 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:48,906 INFO L93 Difference]: Finished difference Result 58669 states and 220313 transitions. [2021-06-06 00:15:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:15:48,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:15:48,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:49,383 INFO L225 Difference]: With dead ends: 58669 [2021-06-06 00:15:49,383 INFO L226 Difference]: Without dead ends: 58645 [2021-06-06 00:15:49,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:15:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58645 states. [2021-06-06 00:15:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58645 to 39977. [2021-06-06 00:15:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39977 states, 39976 states have (on average 3.894911947168301) internal successors, (155703), 39976 states have internal predecessors, (155703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39977 states to 39977 states and 155703 transitions. [2021-06-06 00:15:50,840 INFO L78 Accepts]: Start accepts. Automaton has 39977 states and 155703 transitions. Word has length 28 [2021-06-06 00:15:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:50,840 INFO L482 AbstractCegarLoop]: Abstraction has 39977 states and 155703 transitions. [2021-06-06 00:15:50,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 39977 states and 155703 transitions. [2021-06-06 00:15:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:50,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:50,901 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:51,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4170 [2021-06-06 00:15:51,101 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-06 00:15:51,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:51,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752725339] [2021-06-06 00:15:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:51,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:51,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752725339] [2021-06-06 00:15:51,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752725339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:51,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430886931] [2021-06-06 00:15:51,140 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:51,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:51,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430886931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:51,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:51,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:15:51,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012916571] [2021-06-06 00:15:51,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:51,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:51,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:51,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:51,238 INFO L87 Difference]: Start difference. First operand 39977 states and 155703 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:15:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:53,027 INFO L93 Difference]: Finished difference Result 61863 states and 229407 transitions. [2021-06-06 00:15:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:15:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:15:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:53,220 INFO L225 Difference]: With dead ends: 61863 [2021-06-06 00:15:53,220 INFO L226 Difference]: Without dead ends: 61863 [2021-06-06 00:15:53,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 856.0ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:15:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61863 states. [2021-06-06 00:15:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61863 to 44335. [2021-06-06 00:15:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8447692515902014) internal successors, (170454), 44334 states have internal predecessors, (170454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170454 transitions. [2021-06-06 00:15:54,637 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170454 transitions. Word has length 28 [2021-06-06 00:15:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:54,638 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170454 transitions. [2021-06-06 00:15:54,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:15:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170454 transitions. [2021-06-06 00:15:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:54,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:54,706 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:54,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4171 [2021-06-06 00:15:54,909 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-06 00:15:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:54,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681436075] [2021-06-06 00:15:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681436075] [2021-06-06 00:15:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681436075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122818600] [2021-06-06 00:15:54,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:54,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:15:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:55,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122818600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:55,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:55,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:15:55,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962783602] [2021-06-06 00:15:55,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:55,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:55,040 INFO L87 Difference]: Start difference. First operand 44335 states and 170454 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:15:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:56,607 INFO L93 Difference]: Finished difference Result 61094 states and 227301 transitions. [2021-06-06 00:15:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:15:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:15:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:56,775 INFO L225 Difference]: With dead ends: 61094 [2021-06-06 00:15:56,776 INFO L226 Difference]: Without dead ends: 61086 [2021-06-06 00:15:56,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:15:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-06-06 00:15:58,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 43181. [2021-06-06 00:15:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43181 states, 43180 states have (on average 3.8640805928670683) internal successors, (166851), 43180 states have internal predecessors, (166851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43181 states to 43181 states and 166851 transitions. [2021-06-06 00:15:58,283 INFO L78 Accepts]: Start accepts. Automaton has 43181 states and 166851 transitions. Word has length 28 [2021-06-06 00:15:58,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:58,283 INFO L482 AbstractCegarLoop]: Abstraction has 43181 states and 166851 transitions. [2021-06-06 00:15:58,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:15:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 43181 states and 166851 transitions. [2021-06-06 00:15:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:58,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:58,353 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:58,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4172 [2021-06-06 00:15:58,553 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:58,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:58,553 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-06 00:15:58,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:58,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633443710] [2021-06-06 00:15:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:58,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:58,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633443710] [2021-06-06 00:15:58,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633443710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:58,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510472710] [2021-06-06 00:15:58,592 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:58,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:58,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:58,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510472710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:58,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:58,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:15:58,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067004473] [2021-06-06 00:15:58,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:58,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:58,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:58,684 INFO L87 Difference]: Start difference. First operand 43181 states and 166851 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:16:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:00,070 INFO L93 Difference]: Finished difference Result 59433 states and 222664 transitions. [2021-06-06 00:16:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:16:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:16:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:00,235 INFO L225 Difference]: With dead ends: 59433 [2021-06-06 00:16:00,235 INFO L226 Difference]: Without dead ends: 59409 [2021-06-06 00:16:00,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 597.4ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:16:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59409 states. [2021-06-06 00:16:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59409 to 43201. [2021-06-06 00:16:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43201 states, 43200 states have (on average 3.861782407407407) internal successors, (166829), 43200 states have internal predecessors, (166829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43201 states to 43201 states and 166829 transitions. [2021-06-06 00:16:01,577 INFO L78 Accepts]: Start accepts. Automaton has 43201 states and 166829 transitions. Word has length 28 [2021-06-06 00:16:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:01,577 INFO L482 AbstractCegarLoop]: Abstraction has 43201 states and 166829 transitions. [2021-06-06 00:16:01,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:16:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 43201 states and 166829 transitions. [2021-06-06 00:16:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:01,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:01,642 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:01,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4173 [2021-06-06 00:16:01,843 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-06 00:16:01,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:01,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963121267] [2021-06-06 00:16:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:01,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:01,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963121267] [2021-06-06 00:16:01,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963121267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:01,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801483889] [2021-06-06 00:16:01,888 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:01,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:01,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:01,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801483889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:01,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:01,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:16:01,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695970045] [2021-06-06 00:16:01,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:16:01,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:16:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:01,988 INFO L87 Difference]: Start difference. First operand 43201 states and 166829 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:16:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:03,319 INFO L93 Difference]: Finished difference Result 60686 states and 226187 transitions. [2021-06-06 00:16:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:16:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:16:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:03,488 INFO L225 Difference]: With dead ends: 60686 [2021-06-06 00:16:03,488 INFO L226 Difference]: Without dead ends: 60646 [2021-06-06 00:16:03,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 532.5ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:16:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60646 states. [2021-06-06 00:16:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60646 to 43335. [2021-06-06 00:16:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43335 states, 43334 states have (on average 3.8610790603221488) internal successors, (167316), 43334 states have internal predecessors, (167316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43335 states to 43335 states and 167316 transitions. [2021-06-06 00:16:04,837 INFO L78 Accepts]: Start accepts. Automaton has 43335 states and 167316 transitions. Word has length 28 [2021-06-06 00:16:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:04,837 INFO L482 AbstractCegarLoop]: Abstraction has 43335 states and 167316 transitions. [2021-06-06 00:16:04,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:16:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 43335 states and 167316 transitions. [2021-06-06 00:16:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:04,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:04,903 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:05,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4174 [2021-06-06 00:16:05,103 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-06 00:16:05,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:05,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379154560] [2021-06-06 00:16:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:05,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:05,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379154560] [2021-06-06 00:16:05,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379154560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:05,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252889543] [2021-06-06 00:16:05,143 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:05,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:16:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:05,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:05,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252889543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:05,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:05,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:05,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355020379] [2021-06-06 00:16:05,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:05,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:05,273 INFO L87 Difference]: Start difference. First operand 43335 states and 167316 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:07,031 INFO L93 Difference]: Finished difference Result 59923 states and 223885 transitions. [2021-06-06 00:16:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:16:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-06 00:16:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:07,191 INFO L225 Difference]: With dead ends: 59923 [2021-06-06 00:16:07,191 INFO L226 Difference]: Without dead ends: 59923 [2021-06-06 00:16:07,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 851.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:16:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59923 states. [2021-06-06 00:16:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59923 to 44240. [2021-06-06 00:16:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44240 states, 44239 states have (on average 3.851511110106467) internal successors, (170387), 44239 states have internal predecessors, (170387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44240 states to 44240 states and 170387 transitions. [2021-06-06 00:16:08,605 INFO L78 Accepts]: Start accepts. Automaton has 44240 states and 170387 transitions. Word has length 28 [2021-06-06 00:16:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:08,605 INFO L482 AbstractCegarLoop]: Abstraction has 44240 states and 170387 transitions. [2021-06-06 00:16:08,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 44240 states and 170387 transitions. [2021-06-06 00:16:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:08,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:08,679 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:08,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4175 [2021-06-06 00:16:08,879 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-06 00:16:08,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:08,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789457694] [2021-06-06 00:16:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:08,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:08,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789457694] [2021-06-06 00:16:08,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789457694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:08,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806846353] [2021-06-06 00:16:08,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:08,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:09,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806846353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:09,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:09,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:09,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394546633] [2021-06-06 00:16:09,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:09,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:09,051 INFO L87 Difference]: Start difference. First operand 44240 states and 170387 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:10,710 INFO L93 Difference]: Finished difference Result 59425 states and 222490 transitions. [2021-06-06 00:16:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:16:10,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-06 00:16:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:10,907 INFO L225 Difference]: With dead ends: 59425 [2021-06-06 00:16:10,907 INFO L226 Difference]: Without dead ends: 59417 [2021-06-06 00:16:10,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 719.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:16:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59417 states. [2021-06-06 00:16:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59417 to 44164. [2021-06-06 00:16:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44164 states, 44163 states have (on average 3.8527953264044563) internal successors, (170151), 44163 states have internal predecessors, (170151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44164 states to 44164 states and 170151 transitions. [2021-06-06 00:16:12,290 INFO L78 Accepts]: Start accepts. Automaton has 44164 states and 170151 transitions. Word has length 28 [2021-06-06 00:16:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:12,290 INFO L482 AbstractCegarLoop]: Abstraction has 44164 states and 170151 transitions. [2021-06-06 00:16:12,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 44164 states and 170151 transitions. [2021-06-06 00:16:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:12,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:12,356 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:12,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-06-06 00:16:12,561 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-06 00:16:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:12,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893763389] [2021-06-06 00:16:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:12,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:12,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893763389] [2021-06-06 00:16:12,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893763389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:12,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19087697] [2021-06-06 00:16:12,601 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:12,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:12,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19087697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:12,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:12,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374271113] [2021-06-06 00:16:12,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:12,726 INFO L87 Difference]: Start difference. First operand 44164 states and 170151 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:13,476 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-06-06 00:16:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:14,125 INFO L93 Difference]: Finished difference Result 58902 states and 221244 transitions. [2021-06-06 00:16:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:16:14,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:14,282 INFO L225 Difference]: With dead ends: 58902 [2021-06-06 00:16:14,282 INFO L226 Difference]: Without dead ends: 58878 [2021-06-06 00:16:14,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 853.3ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:16:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58878 states. [2021-06-06 00:16:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58878 to 44150. [2021-06-06 00:16:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44150 states, 44149 states have (on average 3.8527712971981245) internal successors, (170096), 44149 states have internal predecessors, (170096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44150 states to 44150 states and 170096 transitions. [2021-06-06 00:16:15,677 INFO L78 Accepts]: Start accepts. Automaton has 44150 states and 170096 transitions. Word has length 28 [2021-06-06 00:16:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:15,678 INFO L482 AbstractCegarLoop]: Abstraction has 44150 states and 170096 transitions. [2021-06-06 00:16:15,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 44150 states and 170096 transitions. [2021-06-06 00:16:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:15,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:15,745 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:15,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-06-06 00:16:15,946 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-06 00:16:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:15,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851538016] [2021-06-06 00:16:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:15,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851538016] [2021-06-06 00:16:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851538016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971159237] [2021-06-06 00:16:15,985 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:16,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:16:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:16,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971159237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:16,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:16,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:16:16,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738428074] [2021-06-06 00:16:16,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:16:16,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:16,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:16:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:16,087 INFO L87 Difference]: Start difference. First operand 44150 states and 170096 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-06-06 00:16:16,854 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-06-06 00:16:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:17,526 INFO L93 Difference]: Finished difference Result 58684 states and 220551 transitions. [2021-06-06 00:16:17,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:16:17,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-06-06 00:16:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:17,697 INFO L225 Difference]: With dead ends: 58684 [2021-06-06 00:16:17,697 INFO L226 Difference]: Without dead ends: 58644 [2021-06-06 00:16:17,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:16:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58644 states. [2021-06-06 00:16:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58644 to 44499. [2021-06-06 00:16:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44499 states, 44498 states have (on average 3.854667625511259) internal successors, (171525), 44498 states have internal predecessors, (171525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44499 states to 44499 states and 171525 transitions. [2021-06-06 00:16:19,101 INFO L78 Accepts]: Start accepts. Automaton has 44499 states and 171525 transitions. Word has length 28 [2021-06-06 00:16:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:19,101 INFO L482 AbstractCegarLoop]: Abstraction has 44499 states and 171525 transitions. [2021-06-06 00:16:19,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-06-06 00:16:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 44499 states and 171525 transitions. [2021-06-06 00:16:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:19,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:19,163 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:19,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4178 [2021-06-06 00:16:19,364 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-06 00:16:19,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760768563] [2021-06-06 00:16:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760768563] [2021-06-06 00:16:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760768563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790776096] [2021-06-06 00:16:19,405 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:19,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:19,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790776096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:19,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:19,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463052834] [2021-06-06 00:16:19,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:19,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:19,523 INFO L87 Difference]: Start difference. First operand 44499 states and 171525 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:21,005 INFO L93 Difference]: Finished difference Result 71216 states and 265043 transitions. [2021-06-06 00:16:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:16:21,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:21,189 INFO L225 Difference]: With dead ends: 71216 [2021-06-06 00:16:21,189 INFO L226 Difference]: Without dead ends: 71216 [2021-06-06 00:16:21,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:16:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71216 states. [2021-06-06 00:16:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71216 to 45665. [2021-06-06 00:16:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45665 states, 45664 states have (on average 3.8691310441485633) internal successors, (176680), 45664 states have internal predecessors, (176680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45665 states to 45665 states and 176680 transitions. [2021-06-06 00:16:22,634 INFO L78 Accepts]: Start accepts. Automaton has 45665 states and 176680 transitions. Word has length 28 [2021-06-06 00:16:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:22,634 INFO L482 AbstractCegarLoop]: Abstraction has 45665 states and 176680 transitions. [2021-06-06 00:16:22,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 45665 states and 176680 transitions. [2021-06-06 00:16:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:22,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:22,701 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:22,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4179,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:22,902 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-06 00:16:22,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:22,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993165798] [2021-06-06 00:16:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:22,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:22,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993165798] [2021-06-06 00:16:22,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993165798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:22,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069653197] [2021-06-06 00:16:22,941 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:22,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:22,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:22,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:23,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069653197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:23,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:23,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618099642] [2021-06-06 00:16:23,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:23,060 INFO L87 Difference]: Start difference. First operand 45665 states and 176680 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:24,560 INFO L93 Difference]: Finished difference Result 65301 states and 246293 transitions. [2021-06-06 00:16:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:16:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:24,740 INFO L225 Difference]: With dead ends: 65301 [2021-06-06 00:16:24,740 INFO L226 Difference]: Without dead ends: 65301 [2021-06-06 00:16:24,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:16:24,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65301 states. [2021-06-06 00:16:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65301 to 45695. [2021-06-06 00:16:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45695 states, 45694 states have (on average 3.8689324637808027) internal successors, (176787), 45694 states have internal predecessors, (176787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45695 states to 45695 states and 176787 transitions. [2021-06-06 00:16:26,160 INFO L78 Accepts]: Start accepts. Automaton has 45695 states and 176787 transitions. Word has length 28 [2021-06-06 00:16:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:26,160 INFO L482 AbstractCegarLoop]: Abstraction has 45695 states and 176787 transitions. [2021-06-06 00:16:26,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 45695 states and 176787 transitions. [2021-06-06 00:16:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:26,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:26,228 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:26,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:26,429 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-06 00:16:26,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:26,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104692046] [2021-06-06 00:16:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:26,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104692046] [2021-06-06 00:16:26,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104692046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988772833] [2021-06-06 00:16:26,482 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:26,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:16:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:26,876 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-06 00:16:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988772833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:26,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:26,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269063197] [2021-06-06 00:16:26,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:26,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:26,897 INFO L87 Difference]: Start difference. First operand 45695 states and 176787 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:28,517 INFO L93 Difference]: Finished difference Result 66159 states and 248729 transitions. [2021-06-06 00:16:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:16:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-06 00:16:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:28,693 INFO L225 Difference]: With dead ends: 66159 [2021-06-06 00:16:28,693 INFO L226 Difference]: Without dead ends: 66159 [2021-06-06 00:16:28,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1210.8ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:16:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66159 states. [2021-06-06 00:16:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66159 to 45959. [2021-06-06 00:16:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45959 states, 45958 states have (on average 3.8653770834239958) internal successors, (177645), 45958 states have internal predecessors, (177645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45959 states to 45959 states and 177645 transitions. [2021-06-06 00:16:30,373 INFO L78 Accepts]: Start accepts. Automaton has 45959 states and 177645 transitions. Word has length 28 [2021-06-06 00:16:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:30,373 INFO L482 AbstractCegarLoop]: Abstraction has 45959 states and 177645 transitions. [2021-06-06 00:16:30,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 45959 states and 177645 transitions. [2021-06-06 00:16:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:30,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:30,453 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:30,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4181 [2021-06-06 00:16:30,653 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:30,654 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-06 00:16:30,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:30,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144504672] [2021-06-06 00:16:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:30,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144504672] [2021-06-06 00:16:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144504672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121876135] [2021-06-06 00:16:30,692 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:30,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121876135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:30,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:30,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177732006] [2021-06-06 00:16:30,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:30,818 INFO L87 Difference]: Start difference. First operand 45959 states and 177645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:32,144 INFO L93 Difference]: Finished difference Result 65371 states and 246494 transitions. [2021-06-06 00:16:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:16:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-06 00:16:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:32,316 INFO L225 Difference]: With dead ends: 65371 [2021-06-06 00:16:32,316 INFO L226 Difference]: Without dead ends: 65367 [2021-06-06 00:16:32,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:16:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65367 states. [2021-06-06 00:16:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65367 to 45595. [2021-06-06 00:16:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45595 states, 45594 states have (on average 3.8691275167785233) internal successors, (176409), 45594 states have internal predecessors, (176409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45595 states to 45595 states and 176409 transitions. [2021-06-06 00:16:33,975 INFO L78 Accepts]: Start accepts. Automaton has 45595 states and 176409 transitions. Word has length 28 [2021-06-06 00:16:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:33,975 INFO L482 AbstractCegarLoop]: Abstraction has 45595 states and 176409 transitions. [2021-06-06 00:16:33,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-06-06 00:16:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45595 states and 176409 transitions. [2021-06-06 00:16:34,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:34,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:34,044 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:34,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4182,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:34,245 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:34,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-06 00:16:34,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:34,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784953174] [2021-06-06 00:16:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:34,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:34,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784953174] [2021-06-06 00:16:34,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784953174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:34,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313976613] [2021-06-06 00:16:34,284 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:34,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:34,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:34,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:34,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:34,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313976613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:34,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:34,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:34,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926750405] [2021-06-06 00:16:34,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:34,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:34,402 INFO L87 Difference]: Start difference. First operand 45595 states and 176409 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:35,327 INFO L93 Difference]: Finished difference Result 59692 states and 226868 transitions. [2021-06-06 00:16:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:16:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:35,493 INFO L225 Difference]: With dead ends: 59692 [2021-06-06 00:16:35,493 INFO L226 Difference]: Without dead ends: 59692 [2021-06-06 00:16:35,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:16:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59692 states. [2021-06-06 00:16:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59692 to 45611. [2021-06-06 00:16:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45611 states, 45610 states have (on average 3.8710151282613463) internal successors, (176557), 45610 states have internal predecessors, (176557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45611 states to 45611 states and 176557 transitions. [2021-06-06 00:16:37,240 INFO L78 Accepts]: Start accepts. Automaton has 45611 states and 176557 transitions. Word has length 28 [2021-06-06 00:16:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:37,240 INFO L482 AbstractCegarLoop]: Abstraction has 45611 states and 176557 transitions. [2021-06-06 00:16:37,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45611 states and 176557 transitions. [2021-06-06 00:16:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:37,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:37,322 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:37,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4183,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:37,522 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-06 00:16:37,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:37,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869455715] [2021-06-06 00:16:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:37,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869455715] [2021-06-06 00:16:37,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869455715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652737128] [2021-06-06 00:16:37,576 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:37,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:16:37,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:37,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:37,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:37,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652737128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:37,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:37,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166204531] [2021-06-06 00:16:37,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:37,686 INFO L87 Difference]: Start difference. First operand 45611 states and 176557 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:38,476 INFO L93 Difference]: Finished difference Result 59006 states and 224993 transitions. [2021-06-06 00:16:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:16:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:38,639 INFO L225 Difference]: With dead ends: 59006 [2021-06-06 00:16:38,640 INFO L226 Difference]: Without dead ends: 58994 [2021-06-06 00:16:38,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:16:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58994 states. [2021-06-06 00:16:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58994 to 45545. [2021-06-06 00:16:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45545 states, 45544 states have (on average 3.8721675742139468) internal successors, (176354), 45544 states have internal predecessors, (176354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45545 states to 45545 states and 176354 transitions. [2021-06-06 00:16:40,016 INFO L78 Accepts]: Start accepts. Automaton has 45545 states and 176354 transitions. Word has length 28 [2021-06-06 00:16:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:40,016 INFO L482 AbstractCegarLoop]: Abstraction has 45545 states and 176354 transitions. [2021-06-06 00:16:40,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 45545 states and 176354 transitions. [2021-06-06 00:16:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:40,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:40,086 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:40,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4184 [2021-06-06 00:16:40,287 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-06 00:16:40,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:40,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584650352] [2021-06-06 00:16:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:40,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:40,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584650352] [2021-06-06 00:16:40,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584650352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:40,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106538926] [2021-06-06 00:16:40,328 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:40,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:40,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:40,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:40,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:40,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106538926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:40,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:40,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:40,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33553878] [2021-06-06 00:16:40,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:40,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:40,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:40,449 INFO L87 Difference]: Start difference. First operand 45545 states and 176354 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:40,797 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-06 00:16:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:41,356 INFO L93 Difference]: Finished difference Result 50032 states and 191152 transitions. [2021-06-06 00:16:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:16:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:41,489 INFO L225 Difference]: With dead ends: 50032 [2021-06-06 00:16:41,489 INFO L226 Difference]: Without dead ends: 50032 [2021-06-06 00:16:41,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:16:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50032 states. [2021-06-06 00:16:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50032 to 45753. [2021-06-06 00:16:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45753 states, 45752 states have (on average 3.86968875677566) internal successors, (177046), 45752 states have internal predecessors, (177046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45753 states to 45753 states and 177046 transitions. [2021-06-06 00:16:42,679 INFO L78 Accepts]: Start accepts. Automaton has 45753 states and 177046 transitions. Word has length 28 [2021-06-06 00:16:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:42,679 INFO L482 AbstractCegarLoop]: Abstraction has 45753 states and 177046 transitions. [2021-06-06 00:16:42,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 45753 states and 177046 transitions. [2021-06-06 00:16:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:42,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:42,749 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:42,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-06-06 00:16:42,950 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-06 00:16:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:42,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623951091] [2021-06-06 00:16:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:42,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:42,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623951091] [2021-06-06 00:16:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623951091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:42,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923654935] [2021-06-06 00:16:42,985 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:43,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:43,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:43,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:43,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923654935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:43,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:43,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:16:43,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44698713] [2021-06-06 00:16:43,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:16:43,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:16:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:43,094 INFO L87 Difference]: Start difference. First operand 45753 states and 177046 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:16:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:43,674 INFO L93 Difference]: Finished difference Result 49879 states and 190754 transitions. [2021-06-06 00:16:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:16:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-06 00:16:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:43,801 INFO L225 Difference]: With dead ends: 49879 [2021-06-06 00:16:43,801 INFO L226 Difference]: Without dead ends: 49875 [2021-06-06 00:16:43,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:16:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49875 states. [2021-06-06 00:16:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49875 to 45693. [2021-06-06 00:16:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45693 states, 45692 states have (on average 3.8705681519740875) internal successors, (176854), 45692 states have internal predecessors, (176854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45693 states to 45693 states and 176854 transitions. [2021-06-06 00:16:45,734 INFO L78 Accepts]: Start accepts. Automaton has 45693 states and 176854 transitions. Word has length 28 [2021-06-06 00:16:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:45,734 INFO L482 AbstractCegarLoop]: Abstraction has 45693 states and 176854 transitions. [2021-06-06 00:16:45,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-06 00:16:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 45693 states and 176854 transitions. [2021-06-06 00:16:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:45,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:45,806 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:46,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-06 00:16:46,007 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 78 times [2021-06-06 00:16:46,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:46,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547693044] [2021-06-06 00:16:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:46,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:46,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547693044] [2021-06-06 00:16:46,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547693044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:46,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475312514] [2021-06-06 00:16:46,047 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:46,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:16:46,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:46,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475312514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:46,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:46,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:16:46,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881226910] [2021-06-06 00:16:46,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:16:46,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:46,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:16:46,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:46,124 INFO L87 Difference]: Start difference. First operand 45693 states and 176854 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-06 00:16:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:46,693 INFO L93 Difference]: Finished difference Result 49934 states and 190867 transitions. [2021-06-06 00:16:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:16:46,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-06 00:16:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:46,828 INFO L225 Difference]: With dead ends: 49934 [2021-06-06 00:16:46,828 INFO L226 Difference]: Without dead ends: 49934 [2021-06-06 00:16:46,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:16:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-06-06 00:16:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45797. [2021-06-06 00:16:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45797 states, 45796 states have (on average 3.8688531749497774) internal successors, (177178), 45796 states have internal predecessors, (177178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45797 states to 45797 states and 177178 transitions. [2021-06-06 00:16:48,021 INFO L78 Accepts]: Start accepts. Automaton has 45797 states and 177178 transitions. Word has length 28 [2021-06-06 00:16:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:48,021 INFO L482 AbstractCegarLoop]: Abstraction has 45797 states and 177178 transitions. [2021-06-06 00:16:48,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-06 00:16:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 45797 states and 177178 transitions. [2021-06-06 00:16:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:48,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:48,091 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:48,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4187,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:48,292 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash -751583464, now seen corresponding path program 79 times [2021-06-06 00:16:48,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:48,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604299337] [2021-06-06 00:16:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:48,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:48,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604299337] [2021-06-06 00:16:48,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604299337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:48,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269275811] [2021-06-06 00:16:48,332 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:48,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:48,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:48,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269275811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:48,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:48,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-06 00:16:48,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106888884] [2021-06-06 00:16:48,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:48,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:48,452 INFO L87 Difference]: Start difference. First operand 45797 states and 177178 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-06 00:16:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:49,328 INFO L93 Difference]: Finished difference Result 56721 states and 216081 transitions. [2021-06-06 00:16:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:16:49,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-06 00:16:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:49,475 INFO L225 Difference]: With dead ends: 56721 [2021-06-06 00:16:49,475 INFO L226 Difference]: Without dead ends: 56631 [2021-06-06 00:16:49,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:16:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56631 states. [2021-06-06 00:16:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56631 to 45626. [2021-06-06 00:16:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45626 states, 45625 states have (on average 3.866717808219178) internal successors, (176419), 45625 states have internal predecessors, (176419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45626 states to 45626 states and 176419 transitions. [2021-06-06 00:16:50,783 INFO L78 Accepts]: Start accepts. Automaton has 45626 states and 176419 transitions. Word has length 28 [2021-06-06 00:16:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:50,783 INFO L482 AbstractCegarLoop]: Abstraction has 45626 states and 176419 transitions. [2021-06-06 00:16:50,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-06 00:16:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 45626 states and 176419 transitions. [2021-06-06 00:16:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:50,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:50,854 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:51,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-06 00:16:51,054 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:51,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 80 times [2021-06-06 00:16:51,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:51,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100420016] [2021-06-06 00:16:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:16:51,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100420016] [2021-06-06 00:16:51,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100420016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461489215] [2021-06-06 00:16:51,096 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:51,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:51,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:16:51,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461489215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:51,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:51,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-06 00:16:51,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620368673] [2021-06-06 00:16:51,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:51,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:51,167 INFO L87 Difference]: Start difference. First operand 45626 states and 176419 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-06-06 00:16:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:51,623 INFO L93 Difference]: Finished difference Result 50119 states and 191428 transitions. [2021-06-06 00:16:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:16:51,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-06-06 00:16:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:51,757 INFO L225 Difference]: With dead ends: 50119 [2021-06-06 00:16:51,757 INFO L226 Difference]: Without dead ends: 50107 [2021-06-06 00:16:51,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:16:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50107 states. [2021-06-06 00:16:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50107 to 45780. [2021-06-06 00:16:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.864523034579174) internal successors, (176914), 45779 states have internal predecessors, (176914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176914 transitions. [2021-06-06 00:16:53,042 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176914 transitions. Word has length 28 [2021-06-06 00:16:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:53,042 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176914 transitions. [2021-06-06 00:16:53,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-06-06 00:16:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176914 transitions. [2021-06-06 00:16:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:53,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:53,111 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:53,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-06-06 00:16:53,313 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 81 times [2021-06-06 00:16:53,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:53,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668898261] [2021-06-06 00:16:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:53,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:53,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668898261] [2021-06-06 00:16:53,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668898261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:53,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701577341] [2021-06-06 00:16:53,352 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:53,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:16:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:53,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:53,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701577341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:53,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:53,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:16:53,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346240658] [2021-06-06 00:16:53,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:16:53,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:53,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:16:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:53,423 INFO L87 Difference]: Start difference. First operand 45780 states and 176914 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-06 00:16:54,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:54,272 INFO L93 Difference]: Finished difference Result 50083 states and 191344 transitions. [2021-06-06 00:16:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:16:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-06 00:16:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:54,415 INFO L225 Difference]: With dead ends: 50083 [2021-06-06 00:16:54,415 INFO L226 Difference]: Without dead ends: 50063 [2021-06-06 00:16:54,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:16:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50063 states. [2021-06-06 00:16:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50063 to 45780. [2021-06-06 00:16:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.8644356582712596) internal successors, (176910), 45779 states have internal predecessors, (176910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176910 transitions. [2021-06-06 00:16:55,694 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176910 transitions. Word has length 28 [2021-06-06 00:16:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:55,694 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176910 transitions. [2021-06-06 00:16:55,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-06 00:16:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176910 transitions. [2021-06-06 00:16:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:55,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:55,763 INFO L554 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, 1, 1] [2021-06-06 00:16:55,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4190,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:55,963 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:55,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-06 00:16:55,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:55,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631818547] [2021-06-06 00:16:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:55,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:55,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631818547] [2021-06-06 00:16:55,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631818547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:55,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572527193] [2021-06-06 00:16:55,999 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:56,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:16:56,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:16:56,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:56,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572527193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:56,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:56,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:16:56,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485821257] [2021-06-06 00:16:56,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:16:56,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:56,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:16:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:56,087 INFO L87 Difference]: Start difference. First operand 45780 states and 176910 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:56,568 INFO L93 Difference]: Finished difference Result 50741 states and 194475 transitions. [2021-06-06 00:16:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:56,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:56,703 INFO L225 Difference]: With dead ends: 50741 [2021-06-06 00:16:56,703 INFO L226 Difference]: Without dead ends: 50728 [2021-06-06 00:16:56,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:16:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50728 states. [2021-06-06 00:16:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50728 to 48513. [2021-06-06 00:16:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48513 states, 48512 states have (on average 3.873330310026385) internal successors, (187903), 48512 states have internal predecessors, (187903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48513 states to 48513 states and 187903 transitions. [2021-06-06 00:16:58,091 INFO L78 Accepts]: Start accepts. Automaton has 48513 states and 187903 transitions. Word has length 28 [2021-06-06 00:16:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:58,091 INFO L482 AbstractCegarLoop]: Abstraction has 48513 states and 187903 transitions. [2021-06-06 00:16:58,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 48513 states and 187903 transitions. [2021-06-06 00:16:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:58,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:58,163 INFO L554 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, 1, 1] [2021-06-06 00:16:58,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4191 [2021-06-06 00:16:58,363 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:58,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:58,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-06 00:16:58,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:58,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76994128] [2021-06-06 00:16:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:58,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:58,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76994128] [2021-06-06 00:16:58,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76994128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327972017] [2021-06-06 00:16:58,426 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:16:58,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:58,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327972017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:58,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:58,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:16:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136131817] [2021-06-06 00:16:58,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:16:58,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:16:58,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:58,528 INFO L87 Difference]: Start difference. First operand 48513 states and 187903 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:59,403 INFO L93 Difference]: Finished difference Result 54090 states and 205931 transitions. [2021-06-06 00:16:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:16:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:59,551 INFO L225 Difference]: With dead ends: 54090 [2021-06-06 00:16:59,551 INFO L226 Difference]: Without dead ends: 54090 [2021-06-06 00:16:59,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:16:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54090 states. [2021-06-06 00:17:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54090 to 43050. [2021-06-06 00:17:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43050 states, 43049 states have (on average 3.8601593532950824) internal successors, (166176), 43049 states have internal predecessors, (166176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43050 states to 43050 states and 166176 transitions. [2021-06-06 00:17:00,752 INFO L78 Accepts]: Start accepts. Automaton has 43050 states and 166176 transitions. Word has length 28 [2021-06-06 00:17:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:00,752 INFO L482 AbstractCegarLoop]: Abstraction has 43050 states and 166176 transitions. [2021-06-06 00:17:00,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 43050 states and 166176 transitions. [2021-06-06 00:17:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:00,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:00,816 INFO L554 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, 1, 1] [2021-06-06 00:17:01,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4192,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:01,017 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-06 00:17:01,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:01,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730982745] [2021-06-06 00:17:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:01,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:01,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730982745] [2021-06-06 00:17:01,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730982745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:01,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20893032] [2021-06-06 00:17:01,052 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:01,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:01,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20893032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:01,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:01,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:01,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570337634] [2021-06-06 00:17:01,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:01,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:01,144 INFO L87 Difference]: Start difference. First operand 43050 states and 166176 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:01,682 INFO L93 Difference]: Finished difference Result 47933 states and 182630 transitions. [2021-06-06 00:17:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:01,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:01,799 INFO L225 Difference]: With dead ends: 47933 [2021-06-06 00:17:01,800 INFO L226 Difference]: Without dead ends: 47933 [2021-06-06 00:17:01,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:17:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47933 states. [2021-06-06 00:17:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47933 to 43883. [2021-06-06 00:17:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43883 states, 43882 states have (on average 3.858848730686842) internal successors, (169334), 43882 states have internal predecessors, (169334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43883 states to 43883 states and 169334 transitions. [2021-06-06 00:17:03,013 INFO L78 Accepts]: Start accepts. Automaton has 43883 states and 169334 transitions. Word has length 28 [2021-06-06 00:17:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:03,014 INFO L482 AbstractCegarLoop]: Abstraction has 43883 states and 169334 transitions. [2021-06-06 00:17:03,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 43883 states and 169334 transitions. [2021-06-06 00:17:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:03,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:03,080 INFO L554 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, 1, 1] [2021-06-06 00:17:03,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4193 [2021-06-06 00:17:03,281 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-06 00:17:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:03,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77048702] [2021-06-06 00:17:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:03,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:03,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77048702] [2021-06-06 00:17:03,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77048702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:03,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926699863] [2021-06-06 00:17:03,323 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:03,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:17:03,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:03,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:03,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926699863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:03,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:03,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:17:03,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838620947] [2021-06-06 00:17:03,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:03,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:03,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:03,410 INFO L87 Difference]: Start difference. First operand 43883 states and 169334 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:04,131 INFO L93 Difference]: Finished difference Result 45643 states and 175210 transitions. [2021-06-06 00:17:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:17:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:04,243 INFO L225 Difference]: With dead ends: 45643 [2021-06-06 00:17:04,244 INFO L226 Difference]: Without dead ends: 45643 [2021-06-06 00:17:04,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 398.0ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:17:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45643 states. [2021-06-06 00:17:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45643 to 43891. [2021-06-06 00:17:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43891 states, 43890 states have (on average 3.8586921850079743) internal successors, (169358), 43890 states have internal predecessors, (169358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43891 states to 43891 states and 169358 transitions. [2021-06-06 00:17:05,442 INFO L78 Accepts]: Start accepts. Automaton has 43891 states and 169358 transitions. Word has length 28 [2021-06-06 00:17:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:05,442 INFO L482 AbstractCegarLoop]: Abstraction has 43891 states and 169358 transitions. [2021-06-06 00:17:05,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 43891 states and 169358 transitions. [2021-06-06 00:17:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:05,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:05,517 INFO L554 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, 1, 1] [2021-06-06 00:17:05,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4194 [2021-06-06 00:17:05,721 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-06 00:17:05,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:05,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555770185] [2021-06-06 00:17:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:05,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555770185] [2021-06-06 00:17:05,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555770185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982204522] [2021-06-06 00:17:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:05,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:05,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:05,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:05,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:05,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982204522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:05,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:05,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:17:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106641558] [2021-06-06 00:17:05,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:17:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:17:05,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:17:05,853 INFO L87 Difference]: Start difference. First operand 43891 states and 169358 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:17:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:06,314 INFO L93 Difference]: Finished difference Result 45363 states and 174288 transitions. [2021-06-06 00:17:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:17:06,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-06 00:17:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:06,426 INFO L225 Difference]: With dead ends: 45363 [2021-06-06 00:17:06,426 INFO L226 Difference]: Without dead ends: 45363 [2021-06-06 00:17:06,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:17:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45363 states. [2021-06-06 00:17:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45363 to 43785. [2021-06-06 00:17:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 3.858350082221816) internal successors, (168934), 43784 states have internal predecessors, (168934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 168934 transitions. [2021-06-06 00:17:07,586 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 168934 transitions. Word has length 28 [2021-06-06 00:17:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:07,586 INFO L482 AbstractCegarLoop]: Abstraction has 43785 states and 168934 transitions. [2021-06-06 00:17:07,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-06 00:17:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 168934 transitions. [2021-06-06 00:17:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:17:07,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:07,657 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:07,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4195,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:07,859 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:07,859 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-06 00:17:07,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:07,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599481841] [2021-06-06 00:17:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:08,169 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-06-06 00:17:08,337 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-06 00:17:08,483 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-06-06 00:17:08,715 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:17:08,877 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-06-06 00:17:09,033 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-06-06 00:17:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:09,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:09,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599481841] [2021-06-06 00:17:09,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599481841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:09,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682992330] [2021-06-06 00:17:09,115 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:09,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:17:09,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:09,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:17:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:09,491 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-06 00:17:09,720 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:17:10,246 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-06-06 00:17:10,467 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-06 00:17:10,674 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-06 00:17:10,868 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2021-06-06 00:17:11,092 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:17:11,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:17:11,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:17:11,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:17:11,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,368 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:17:11,382 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,760 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 113 [2021-06-06 00:17:11,761 INFO L628 ElimStorePlain]: treesize reduction 98, result has 81.7 percent of original size [2021-06-06 00:17:11,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,773 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:17:11,786 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:17:11,798 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,810 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:17:11,821 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,832 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:11,843 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:11,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:11,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:17:11,851 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:11,966 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-06 00:17:11,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:11,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-06 00:17:11,973 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 20 variables, input treesize:725, output treesize:97 [2021-06-06 00:17:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:12,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682992330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:12,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:12,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-06 00:17:12,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434511281] [2021-06-06 00:17:12,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:17:12,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:17:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:17:12,073 INFO L87 Difference]: Start difference. First operand 43785 states and 168934 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:12,831 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-06 00:17:13,522 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 92 [2021-06-06 00:17:13,755 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2021-06-06 00:17:13,931 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2021-06-06 00:17:14,138 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-06-06 00:17:14,326 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-06 00:17:14,883 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 107 [2021-06-06 00:17:15,228 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 94 [2021-06-06 00:17:16,270 WARN L205 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 133 [2021-06-06 00:17:16,876 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2021-06-06 00:17:17,040 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-06 00:17:17,230 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-06 00:17:18,198 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 117 [2021-06-06 00:17:18,975 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 136 [2021-06-06 00:17:19,599 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 112 [2021-06-06 00:17:20,289 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 138 [2021-06-06 00:17:21,039 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 136 [2021-06-06 00:17:21,219 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-06 00:17:22,000 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 144 [2021-06-06 00:17:22,286 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-06 00:17:23,081 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 142 [2021-06-06 00:17:23,409 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-06-06 00:17:23,601 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-06-06 00:17:23,755 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-06 00:17:24,002 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-06-06 00:17:24,294 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-06 00:17:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:24,506 INFO L93 Difference]: Finished difference Result 51109 states and 190238 transitions. [2021-06-06 00:17:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:17:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:17:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:24,631 INFO L225 Difference]: With dead ends: 51109 [2021-06-06 00:17:24,631 INFO L226 Difference]: Without dead ends: 51049 [2021-06-06 00:17:24,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 13329.0ms TimeCoverageRelationStatistics Valid=557, Invalid=3103, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:17:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51049 states. [2021-06-06 00:17:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51049 to 43920. [2021-06-06 00:17:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43920 states, 43919 states have (on average 3.8575331860925797) internal successors, (169419), 43919 states have internal predecessors, (169419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43920 states to 43920 states and 169419 transitions. [2021-06-06 00:17:25,782 INFO L78 Accepts]: Start accepts. Automaton has 43920 states and 169419 transitions. Word has length 30 [2021-06-06 00:17:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:25,782 INFO L482 AbstractCegarLoop]: Abstraction has 43920 states and 169419 transitions. [2021-06-06 00:17:25,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 43920 states and 169419 transitions. [2021-06-06 00:17:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:17:25,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:25,852 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:26,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4196 [2021-06-06 00:17:26,053 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-06 00:17:26,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:26,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37234635] [2021-06-06 00:17:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:26,444 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-06-06 00:17:26,601 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-06 00:17:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:26,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37234635] [2021-06-06 00:17:26,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37234635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818750731] [2021-06-06 00:17:26,911 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:26,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:17:26,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:17:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:27,495 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-06 00:17:28,029 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-06 00:17:28,728 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 134 [2021-06-06 00:17:29,008 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-06 00:17:29,975 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 181 [2021-06-06 00:17:30,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:30,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:30,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:30,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:17:30,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:30,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:30,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:30,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:30,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:17:30,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:31,155 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 217 [2021-06-06 00:17:31,156 INFO L628 ElimStorePlain]: treesize reduction 665, result has 42.2 percent of original size [2021-06-06 00:17:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:31,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:17:31,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:31,389 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-06-06 00:17:31,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:31,404 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:17:31,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:31,608 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2021-06-06 00:17:31,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:31,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-06-06 00:17:31,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:31,812 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-06-06 00:17:31,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:31,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:31,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:31,826 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:31,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:32,011 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-06-06 00:17:32,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:32,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:32,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:32,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:17:32,026 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:32,200 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-06 00:17:32,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:32,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:32,212 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:32,372 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-06 00:17:32,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:32,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:32,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:17:32,386 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:32,537 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-06 00:17:32,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:32,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:32,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:32,693 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-06 00:17:32,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:17:32,705 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:32,838 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-06 00:17:32,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:32,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:32,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:32,851 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:32,976 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:17:32,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:32,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 33 dim-0 vars, 11 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-06 00:17:32,983 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 44 variables, input treesize:1231, output treesize:100 [2021-06-06 00:17:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:33,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818750731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:33,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:33,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:17:33,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481671127] [2021-06-06 00:17:33,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:17:33,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:17:33,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:17:33,088 INFO L87 Difference]: Start difference. First operand 43920 states and 169419 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:33,260 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 35 [2021-06-06 00:17:33,572 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 52 [2021-06-06 00:17:33,932 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 110 [2021-06-06 00:17:34,090 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-06-06 00:17:35,104 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 128 [2021-06-06 00:17:35,657 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2021-06-06 00:17:35,922 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 73 [2021-06-06 00:17:36,256 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-06-06 00:17:37,760 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 174 DAG size of output: 161 [2021-06-06 00:17:38,843 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 148 [2021-06-06 00:17:39,074 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-06-06 00:17:39,277 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-06 00:17:41,219 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 215 DAG size of output: 181 [2021-06-06 00:17:41,794 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 146 [2021-06-06 00:17:42,359 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 147 [2021-06-06 00:17:42,752 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 72 [2021-06-06 00:17:43,167 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-06-06 00:17:44,857 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-06-06 00:17:45,080 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-06-06 00:17:45,254 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-06-06 00:17:45,628 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2021-06-06 00:17:45,892 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 56 [2021-06-06 00:17:46,221 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-06-06 00:17:46,498 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 50 [2021-06-06 00:17:47,075 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2021-06-06 00:17:47,522 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-06-06 00:17:47,660 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-06 00:17:47,795 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2021-06-06 00:17:48,086 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2021-06-06 00:17:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:48,218 INFO L93 Difference]: Finished difference Result 51275 states and 190720 transitions. [2021-06-06 00:17:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:17:48,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:17:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:48,352 INFO L225 Difference]: With dead ends: 51275 [2021-06-06 00:17:48,352 INFO L226 Difference]: Without dead ends: 51176 [2021-06-06 00:17:48,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 16665.6ms TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:17:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51176 states. [2021-06-06 00:17:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51176 to 43931. [2021-06-06 00:17:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43931 states, 43930 states have (on average 3.857546096061917) internal successors, (169462), 43930 states have internal predecessors, (169462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43931 states to 43931 states and 169462 transitions. [2021-06-06 00:17:49,326 INFO L78 Accepts]: Start accepts. Automaton has 43931 states and 169462 transitions. Word has length 30 [2021-06-06 00:17:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:49,326 INFO L482 AbstractCegarLoop]: Abstraction has 43931 states and 169462 transitions. [2021-06-06 00:17:49,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 43931 states and 169462 transitions. [2021-06-06 00:17:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:17:49,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:49,569 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:49,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4219,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:49,769 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:49,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:49,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-06 00:17:49,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:49,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559534308] [2021-06-06 00:17:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:50,029 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 54 [2021-06-06 00:17:50,274 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 112 [2021-06-06 00:17:50,567 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-06-06 00:17:50,883 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 117 [2021-06-06 00:17:51,173 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-06-06 00:17:51,572 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 158 [2021-06-06 00:17:52,159 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 76 [2021-06-06 00:17:52,361 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-06 00:17:52,551 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-06 00:17:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:52,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559534308] [2021-06-06 00:17:52,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559534308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195582926] [2021-06-06 00:17:52,702 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:17:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:17:53,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-06-06 00:17:53,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:53,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-06-06 00:17:53,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-06 00:17:53,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-06 00:17:54,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-06-06 00:17:54,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-06 00:17:54,031 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-06-06 00:17:54,062 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-06-06 00:17:54,076 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:17:54,090 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:17:54,105 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,119 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-06 00:17:54,134 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:17:54,149 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,164 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,179 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,194 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:17:54,209 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-06 00:17:54,223 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,238 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-06-06 00:17:54,254 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,269 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:17:54,285 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:17:54,299 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,314 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-06-06 00:17:54,328 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-06 00:17:54,343 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:17:54,358 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:17:54,373 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:54,387 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,403 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:17:54,418 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,433 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:17:54,448 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,463 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,477 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-06 00:17:54,492 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:17:54,508 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-06 00:17:54,523 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,537 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-06-06 00:17:54,569 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,590 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-06 00:17:54,611 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:17:54,632 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:17:54,653 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,673 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,694 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-06 00:17:54,715 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:17:54,734 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-06 00:17:54,753 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2021-06-06 00:17:54,771 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:17:54,791 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-06 00:17:54,807 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 25 [2021-06-06 00:17:54,826 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-06 00:17:54,844 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:17:54,862 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-06-06 00:17:54,880 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:17:54,898 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:17:54,912 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-06 00:17:54,926 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:17:54,938 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:17:54,945 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:55,043 INFO L628 ElimStorePlain]: treesize reduction 190, result has 28.3 percent of original size [2021-06-06 00:17:55,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:17:55,045 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-06-06 00:17:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:55,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195582926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:55,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:55,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:17:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084362639] [2021-06-06 00:17:55,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:17:55,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:17:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:17:55,107 INFO L87 Difference]: Start difference. First operand 43931 states and 169462 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:55,683 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 70 [2021-06-06 00:17:56,081 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 71 [2021-06-06 00:17:56,511 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 68 [2021-06-06 00:17:56,644 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2021-06-06 00:17:56,970 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2021-06-06 00:17:57,369 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 94 [2021-06-06 00:17:57,631 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 82 [2021-06-06 00:17:57,803 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:17:58,017 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 74 [2021-06-06 00:17:58,185 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2021-06-06 00:17:58,505 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 69 [2021-06-06 00:17:58,949 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 92 [2021-06-06 00:17:59,128 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 67 [2021-06-06 00:17:59,506 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 80 [2021-06-06 00:17:59,774 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 85 [2021-06-06 00:17:59,957 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-06 00:18:00,285 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72 [2021-06-06 00:18:00,498 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 75 [2021-06-06 00:18:00,743 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 77 [2021-06-06 00:18:01,298 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2021-06-06 00:18:01,734 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-06-06 00:18:01,997 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 67 [2021-06-06 00:18:02,183 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-06 00:18:02,375 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-06 00:18:02,689 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 73 [2021-06-06 00:18:02,900 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2021-06-06 00:18:03,133 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 78 [2021-06-06 00:18:03,661 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2021-06-06 00:18:03,940 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-06 00:18:04,185 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2021-06-06 00:18:04,517 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-06 00:18:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:04,803 INFO L93 Difference]: Finished difference Result 55765 states and 208985 transitions. [2021-06-06 00:18:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:18:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:18:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:04,947 INFO L225 Difference]: With dead ends: 55765 [2021-06-06 00:18:04,947 INFO L226 Difference]: Without dead ends: 55735 [2021-06-06 00:18:04,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 10673.8ms TimeCoverageRelationStatistics Valid=534, Invalid=3126, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:18:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55735 states. [2021-06-06 00:18:05,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55735 to 43970. [2021-06-06 00:18:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43970 states, 43969 states have (on average 3.8572630717096135) internal successors, (169600), 43969 states have internal predecessors, (169600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43970 states to 43970 states and 169600 transitions. [2021-06-06 00:18:06,082 INFO L78 Accepts]: Start accepts. Automaton has 43970 states and 169600 transitions. Word has length 30 [2021-06-06 00:18:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:06,082 INFO L482 AbstractCegarLoop]: Abstraction has 43970 states and 169600 transitions. [2021-06-06 00:18:06,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 43970 states and 169600 transitions. [2021-06-06 00:18:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:18:06,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:06,151 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:06,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4272 [2021-06-06 00:18:06,352 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:06,352 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-06-06 00:18:06,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:06,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497209709] [2021-06-06 00:18:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:06,628 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-06 00:18:06,831 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-06 00:18:07,022 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-06 00:18:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:07,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:07,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497209709] [2021-06-06 00:18:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497209709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:07,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33120080] [2021-06-06 00:18:07,286 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:07,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:18:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:18:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:07,678 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-06 00:18:07,904 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-06 00:18:08,586 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-06-06 00:18:09,127 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-06 00:18:09,553 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:18:09,553 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 54 [2021-06-06 00:18:09,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:10,009 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2021-06-06 00:18:10,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:10,068 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-06 00:18:10,068 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 39 [2021-06-06 00:18:10,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:10,520 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2021-06-06 00:18:10,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:10,587 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:18:10,587 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 [2021-06-06 00:18:10,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:11,470 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 337 [2021-06-06 00:18:11,471 INFO L628 ElimStorePlain]: treesize reduction 29, result has 96.7 percent of original size [2021-06-06 00:18:11,542 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:18:11,542 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 [2021-06-06 00:18:11,681 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2021-06-06 00:18:11,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:12,511 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 329 [2021-06-06 00:18:12,511 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.9 percent of original size [2021-06-06 00:18:12,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:12,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-06 00:18:12,572 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:12,962 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2021-06-06 00:18:12,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:13,022 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:18:13,022 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 26 treesize of output 44 [2021-06-06 00:18:13,028 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:13,432 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2021-06-06 00:18:13,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:13,492 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:18:13,492 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 43 [2021-06-06 00:18:13,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:13,889 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-06-06 00:18:13,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:13,955 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:18:13,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-06 00:18:13,971 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:14,752 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 305 [2021-06-06 00:18:14,753 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.8 percent of original size [2021-06-06 00:18:14,821 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:18:14,821 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 38 treesize of output 58 [2021-06-06 00:18:14,830 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:15,611 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 302 [2021-06-06 00:18:15,612 INFO L628 ElimStorePlain]: treesize reduction 24, result has 96.9 percent of original size [2021-06-06 00:18:15,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:15,659 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 40 treesize of output 62 [2021-06-06 00:18:15,670 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:16,469 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 301 [2021-06-06 00:18:16,470 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.5 percent of original size [2021-06-06 00:18:16,528 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:18:16,528 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 33 treesize of output 43 [2021-06-06 00:18:16,532 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:16,917 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2021-06-06 00:18:16,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:16,978 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:18:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 50 [2021-06-06 00:18:16,980 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:17,377 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2021-06-06 00:18:17,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:17,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:17,423 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 62 [2021-06-06 00:18:17,435 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:18,221 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 294 [2021-06-06 00:18:18,222 INFO L628 ElimStorePlain]: treesize reduction 25, result has 96.7 percent of original size [2021-06-06 00:18:18,286 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:18:18,287 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 40 treesize of output 54 [2021-06-06 00:18:18,289 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:18,681 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2021-06-06 00:18:18,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:18,732 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:18:18,733 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 31 treesize of output 43 [2021-06-06 00:18:18,735 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:19,128 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2021-06-06 00:18:19,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:19,180 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:18:19,180 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 26 treesize of output 44 [2021-06-06 00:18:19,185 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:19,574 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2021-06-06 00:18:19,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:19,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 16 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-06 00:18:19,689 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 48 variables, input treesize:877, output treesize:1290 [2021-06-06 00:18:20,125 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2021-06-06 00:18:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:20,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33120080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:20,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:20,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-06 00:18:20,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150216295] [2021-06-06 00:18:20,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:18:20,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:18:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:20,272 INFO L87 Difference]: Start difference. First operand 43970 states and 169600 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:20,454 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2021-06-06 00:18:20,823 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2021-06-06 00:18:21,141 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 90 [2021-06-06 00:18:21,669 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 73 [2021-06-06 00:18:22,221 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 73 [2021-06-06 00:18:22,542 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 69 [2021-06-06 00:18:22,962 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 90 [2021-06-06 00:18:23,246 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2021-06-06 00:18:23,799 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2021-06-06 00:18:24,133 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 69 [2021-06-06 00:18:24,291 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-06 00:18:24,512 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-06-06 00:18:24,681 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-06 00:18:25,407 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 164 [2021-06-06 00:18:26,258 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 93 [2021-06-06 00:18:26,548 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2021-06-06 00:18:26,739 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-06-06 00:18:26,968 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-06 00:18:28,015 WARN L205 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 151 [2021-06-06 00:18:28,203 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-06 00:18:28,521 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-06-06 00:18:29,637 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 185 DAG size of output: 156 [2021-06-06 00:18:29,919 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 64 [2021-06-06 00:18:31,245 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 235 DAG size of output: 160 [2021-06-06 00:18:32,324 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 199 DAG size of output: 147 [2021-06-06 00:18:33,182 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 127 [2021-06-06 00:18:33,474 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-06 00:18:34,826 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 150 DAG size of output: 144 [2021-06-06 00:18:35,645 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 119 [2021-06-06 00:18:36,268 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 117 [2021-06-06 00:18:37,397 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 209 DAG size of output: 176 [2021-06-06 00:18:37,652 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:18:37,892 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-06-06 00:18:38,550 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 115 [2021-06-06 00:18:38,903 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 75 [2021-06-06 00:18:39,197 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2021-06-06 00:18:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:39,383 INFO L93 Difference]: Finished difference Result 53172 states and 196612 transitions. [2021-06-06 00:18:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:18:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:18:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:39,519 INFO L225 Difference]: With dead ends: 53172 [2021-06-06 00:18:39,519 INFO L226 Difference]: Without dead ends: 53142 [2021-06-06 00:18:39,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 20043.5ms TimeCoverageRelationStatistics Valid=681, Invalid=3875, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:18:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53142 states. [2021-06-06 00:18:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53142 to 43998. [2021-06-06 00:18:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43998 states, 43997 states have (on average 3.8568766052230834) internal successors, (169691), 43997 states have internal predecessors, (169691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43998 states to 43998 states and 169691 transitions. [2021-06-06 00:18:40,606 INFO L78 Accepts]: Start accepts. Automaton has 43998 states and 169691 transitions. Word has length 30 [2021-06-06 00:18:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:40,606 INFO L482 AbstractCegarLoop]: Abstraction has 43998 states and 169691 transitions. [2021-06-06 00:18:40,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 43998 states and 169691 transitions. [2021-06-06 00:18:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:18:40,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:40,670 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:40,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4503,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:40,870 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:40,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-06-06 00:18:40,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:40,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109640102] [2021-06-06 00:18:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:41,156 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-06-06 00:18:41,294 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-06-06 00:18:41,500 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-06 00:18:41,684 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-06 00:18:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:41,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109640102] [2021-06-06 00:18:41,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109640102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173605186] [2021-06-06 00:18:41,895 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:41,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:18:41,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:18:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:42,292 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-06 00:18:42,518 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-06 00:18:42,829 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-06 00:18:43,481 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-06-06 00:18:43,943 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-06 00:18:44,483 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 191 [2021-06-06 00:18:44,960 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2021-06-06 00:18:45,295 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_635, v_prenex_636, v_prenex_637, v_prenex_642], 9=[A, v_prenex_638, v_prenex_639, v_prenex_640, v_prenex_641, v_prenex_634]} [2021-06-06 00:18:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:45,371 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-06-06 00:18:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2021-06-06 00:18:45,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:45,443 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-06-06 00:18:45,444 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 61 [2021-06-06 00:18:45,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:47,185 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 255 DAG size of output: 243 [2021-06-06 00:18:47,186 INFO L628 ElimStorePlain]: treesize reduction 59, result has 95.2 percent of original size [2021-06-06 00:18:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:47,255 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-06-06 00:18:47,255 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 49 [2021-06-06 00:18:47,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:47,320 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-06-06 00:18:47,320 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 50 [2021-06-06 00:18:47,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:48,110 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2021-06-06 00:18:48,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:48,180 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-06-06 00:18:48,180 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 50 [2021-06-06 00:18:48,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:48,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:48,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:48,235 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 59 [2021-06-06 00:18:48,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:49,025 WARN L205 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2021-06-06 00:18:49,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:49,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:49,092 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-06-06 00:18:49,092 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 49 [2021-06-06 00:18:49,096 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:49,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:49,159 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-06-06 00:18:49,159 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 42 treesize of output 56 [2021-06-06 00:18:49,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:49,897 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2021-06-06 00:18:49,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:49,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:49,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:49,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:49,971 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-06-06 00:18:49,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 52 [2021-06-06 00:18:49,973 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:49,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:49,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:50,041 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-06-06 00:18:50,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 44 treesize of output 56 [2021-06-06 00:18:50,045 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-06 00:18:50,969 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-06-06 00:18:51,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-06-06 00:18:51,170 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:18:51,172 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:18:51,173 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:18:51,173 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:18:51 BasicIcfg [2021-06-06 00:18:51,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:18:51,174 INFO L168 Benchmark]: Toolchain (without parser) took 759145.43 ms. Allocated memory was 375.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 355.0 MB in the beginning and 11.8 GB in the end (delta: -11.5 GB). Peak memory consumption was 4.5 GB. Max. memory is 16.0 GB. [2021-06-06 00:18:51,174 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 375.4 MB. Free memory was 356.3 MB in the beginning and 356.1 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:18:51,174 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.71 ms. Allocated memory is still 375.4 MB. Free memory was 355.0 MB in the beginning and 353.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:18:51,174 INFO L168 Benchmark]: Boogie Preprocessor took 18.64 ms. Allocated memory is still 375.4 MB. Free memory was 353.5 MB in the beginning and 352.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:18:51,174 INFO L168 Benchmark]: RCFGBuilder took 317.78 ms. Allocated memory is still 375.4 MB. Free memory was 352.4 MB in the beginning and 339.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:18:51,174 INFO L168 Benchmark]: TraceAbstraction took 758775.35 ms. Allocated memory was 375.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 339.1 MB in the beginning and 11.8 GB in the end (delta: -11.5 GB). Peak memory consumption was 4.4 GB. Max. memory is 16.0 GB. [2021-06-06 00:18:51,174 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 0.13 ms. Allocated memory is still 375.4 MB. Free memory was 356.3 MB in the beginning and 356.1 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.71 ms. Allocated memory is still 375.4 MB. Free memory was 355.0 MB in the beginning and 353.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.64 ms. Allocated memory is still 375.4 MB. Free memory was 353.5 MB in the beginning and 352.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 317.78 ms. Allocated memory is still 375.4 MB. Free memory was 352.4 MB in the beginning and 339.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 758775.35 ms. Allocated memory was 375.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 339.1 MB in the beginning and 11.8 GB in the end (delta: -11.5 GB). Peak memory consumption was 4.4 GB. 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 Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 237 for 923ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 758696.2ms, OverallIterations: 261, TraceHistogramMax: 3, EmptinessCheckTime: 5655.7ms, AutomataDifference: 402234.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 57.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11573 SDtfs, 73875 SDslu, 89319 SDs, 0 SdLazy, 142111 SolverSat, 13369 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78690.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16733 GetRequests, 5475 SyntacticMatches, 262 SemanticMatches, 10996 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186724 ImplicationChecksByTransitivity, 359920.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48513occurred in iteration=252, InterpolantAutomatonStates: 9791, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 87064.8ms AutomataMinimizationTime, 260 MinimizatonAttempts, 1289713 StatesRemovedByMinimization, 260 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 855.2ms SsaConstructionTime, 2822.1ms SatisfiabilityAnalysisTime, 192144.3ms InterpolantComputationTime, 13814 NumberOfCodeBlocks, 13814 NumberOfCodeBlocksAsserted, 899 NumberOfCheckSat, 13297 ConstructedInterpolants, 156 QuantifiedInterpolants, 261119 SizeOfPredicates, 1148 NumberOfNonLiveVariables, 17966 ConjunctsInSsa, 3870 ConjunctsInUnsatCore, 517 InterpolantComputations, 3 PerfectInterpolantSequences, 1023/4390 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