/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:53:22,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:53:22,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:53:22,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:53:22,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:53:22,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:53:22,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:53:22,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:53:22,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:53:22,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:53:22,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:53:22,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:53:22,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:53:22,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:53:22,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:53:22,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:53:22,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:53:22,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:53:22,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:53:22,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:53:22,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:53:22,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:53:22,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:53:22,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:53:22,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:53:22,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:53:22,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:53:22,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:53:22,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:53:22,743 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:53:22,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:53:22,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:53:22,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:53:22,747 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:53:22,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:53:22,747 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:53:22,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:53:22,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:53:22,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:53:22,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:53:22,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:53:22,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:53:22,749 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:53:22,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:53:22,750 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:53:22,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:53:22,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:53:22,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:53:22,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:53:22,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:53:22,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:53:22,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:53:22,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:53:22,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:53:22,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:53:22,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:53:22,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:53:22,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:53:23,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:53:23,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:53:23,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:53:23,050 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:53:23,050 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:53:23,051 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly2.c [2019-11-06 18:53:23,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166f8d69e/6f63ffd58f0f487a9a9f7b4e0227841e/FLAG47feef447 [2019-11-06 18:53:23,588 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:53:23,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly2.c [2019-11-06 18:53:23,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166f8d69e/6f63ffd58f0f487a9a9f7b4e0227841e/FLAG47feef447 [2019-11-06 18:53:23,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166f8d69e/6f63ffd58f0f487a9a9f7b4e0227841e [2019-11-06 18:53:23,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:53:23,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:53:23,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:23,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:53:23,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:53:23,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9ca290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:23, skipping insertion in model container [2019-11-06 18:53:23,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:23" (1/1) ... [2019-11-06 18:53:23,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:53:23,982 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:53:24,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:24,160 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:53:24,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:24,195 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:53:24,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24 WrapperNode [2019-11-06 18:53:24,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:24,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:53:24,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:53:24,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:53:24,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (1/1) ... [2019-11-06 18:53:24,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (1/1) ... [2019-11-06 18:53:24,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (1/1) ... [2019-11-06 18:53:24,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (1/1) ... [2019-11-06 18:53:24,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (1/1) ... [2019-11-06 18:53:24,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (1/1) ... [2019-11-06 18:53:24,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (1/1) ... [2019-11-06 18:53:24,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:53:24,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:53:24,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:53:24,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:53:24,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (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 [2019-11-06 18:53:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:53:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:53:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:53:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:53:24,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:53:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:53:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:53:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:53:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:53:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:53:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:53:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:53:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:53:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:53:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:53:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:53:24,668 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:53:24,668 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:53:24,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:24 BoogieIcfgContainer [2019-11-06 18:53:24,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:53:24,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:53:24,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:53:24,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:53:24,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:53:23" (1/3) ... [2019-11-06 18:53:24,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9d1b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:24, skipping insertion in model container [2019-11-06 18:53:24,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:24" (2/3) ... [2019-11-06 18:53:24,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9d1b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:24, skipping insertion in model container [2019-11-06 18:53:24,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:24" (3/3) ... [2019-11-06 18:53:24,677 INFO L109 eAbstractionObserver]: Analyzing ICFG poly2.c [2019-11-06 18:53:24,686 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:53:24,693 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:53:24,704 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:53:24,727 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:53:24,727 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:53:24,728 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:53:24,728 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:53:24,728 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:53:24,728 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:53:24,728 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:53:24,728 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:53:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-06 18:53:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:53:24,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:24,751 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:24,753 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash -718269197, now seen corresponding path program 1 times [2019-11-06 18:53:24,764 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:24,764 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305473867] [2019-11-06 18:53:24,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:24,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305473867] [2019-11-06 18:53:24,947 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:24,947 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:53:24,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571406484] [2019-11-06 18:53:24,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:53:24,953 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:24,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:53:24,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:24,971 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-06 18:53:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:25,058 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2019-11-06 18:53:25,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:53:25,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:53:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:25,071 INFO L225 Difference]: With dead ends: 47 [2019-11-06 18:53:25,071 INFO L226 Difference]: Without dead ends: 23 [2019-11-06 18:53:25,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-06 18:53:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-06 18:53:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 18:53:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-06 18:53:25,122 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-11-06 18:53:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:25,122 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-06 18:53:25,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:53:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-06 18:53:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:53:25,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:25,124 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:25,124 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash 506468199, now seen corresponding path program 1 times [2019-11-06 18:53:25,125 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:25,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770641589] [2019-11-06 18:53:25,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:25,153 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:25,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790343620] [2019-11-06 18:53:25,154 INFO L94 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 [2019-11-06 18:53:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:53:25,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:25,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770641589] [2019-11-06 18:53:25,261 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:25,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790343620] [2019-11-06 18:53:25,262 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:25,262 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:53:25,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449762198] [2019-11-06 18:53:25,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:53:25,264 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:53:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:25,265 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2019-11-06 18:53:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:25,327 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-11-06 18:53:25,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:53:25,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:53:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:25,329 INFO L225 Difference]: With dead ends: 39 [2019-11-06 18:53:25,329 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:53:25,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:53:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-06 18:53:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:53:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:53:25,338 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2019-11-06 18:53:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:25,338 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:53:25,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:53:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:53:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:53:25,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:25,340 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:25,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:25,545 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1419313573, now seen corresponding path program 1 times [2019-11-06 18:53:25,545 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:25,545 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823883780] [2019-11-06 18:53:25,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:25,558 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:25,558 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501480047] [2019-11-06 18:53:25,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:53:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:53:25,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:25,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823883780] [2019-11-06 18:53:25,662 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:25,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501480047] [2019-11-06 18:53:25,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:25,663 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:53:25,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62968039] [2019-11-06 18:53:25,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:53:25,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:53:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:25,665 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2019-11-06 18:53:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:25,766 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-11-06 18:53:25,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:53:25,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-06 18:53:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:25,768 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:53:25,768 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:53:25,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:53:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-06 18:53:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:53:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-06 18:53:25,775 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-11-06 18:53:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:25,776 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-06 18:53:25,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:53:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-06 18:53:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:53:25,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:25,777 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:25,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:25,982 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:25,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1804577693, now seen corresponding path program 2 times [2019-11-06 18:53:25,984 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:25,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696418138] [2019-11-06 18:53:25,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:25,998 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:25,998 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870801402] [2019-11-06 18:53:25,999 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:53:26,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:53:26,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:26,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:53:26,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:53:26,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696418138] [2019-11-06 18:53:26,076 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:26,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870801402] [2019-11-06 18:53:26,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:26,077 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:53:26,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753944060] [2019-11-06 18:53:26,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:53:26,078 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:53:26,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:26,079 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2019-11-06 18:53:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:26,154 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-11-06 18:53:26,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:53:26,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-06 18:53:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:26,158 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:53:26,158 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:53:26,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:53:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-11-06 18:53:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:53:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-06 18:53:26,169 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2019-11-06 18:53:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:26,170 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-06 18:53:26,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:53:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-06 18:53:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:53:26,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:26,171 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:26,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:26,378 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash 908918625, now seen corresponding path program 1 times [2019-11-06 18:53:26,379 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:26,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867907319] [2019-11-06 18:53:26,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:26,391 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:26,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718679174] [2019-11-06 18:53:26,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:53:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:26,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:53:26,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:53:26,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867907319] [2019-11-06 18:53:26,473 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:26,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718679174] [2019-11-06 18:53:26,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:26,474 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:53:26,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226085177] [2019-11-06 18:53:26,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:53:26,475 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:53:26,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:53:26,476 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2019-11-06 18:53:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:26,572 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2019-11-06 18:53:26,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:53:26,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-06 18:53:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:26,574 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:53:26,574 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:53:26,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:53:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:53:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2019-11-06 18:53:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:53:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-06 18:53:26,591 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2019-11-06 18:53:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:26,591 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-06 18:53:26,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:53:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-06 18:53:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:53:26,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:26,595 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:26,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:26,796 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1533731551, now seen corresponding path program 2 times [2019-11-06 18:53:26,797 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:26,798 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407079148] [2019-11-06 18:53:26,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:26,807 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:26,807 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933567742] [2019-11-06 18:53:26,807 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-11-06 18:53:26,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:53:26,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:26,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:53:26,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:26,948 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:26,949 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,111 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-11-06 18:53:27,112 INFO L567 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2019-11-06 18:53:27,124 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-11-06 18:53:27,124 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,180 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:27,180 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,180 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:21 [2019-11-06 18:53:27,325 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:53:27,326 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-06 18:53:27,327 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,333 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:27,333 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,334 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-06 18:53:27,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:27,382 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:27,382 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,480 INFO L341 Elim1Store]: treesize reduction 10, result has 91.9 percent of original size [2019-11-06 18:53:27,480 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 142 [2019-11-06 18:53:27,483 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,516 INFO L567 ElimStorePlain]: treesize reduction 133, result has 17.4 percent of original size [2019-11-06 18:53:27,516 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,517 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:112, output treesize:28 [2019-11-06 18:53:27,591 INFO L341 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2019-11-06 18:53:27,592 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2019-11-06 18:53:27,593 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,598 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:27,599 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,599 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2019-11-06 18:53:27,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:27,663 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:27,665 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:27,666 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:27,671 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2019-11-06 18:53:27,672 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,675 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:53:27,675 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,684 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-11-06 18:53:27,684 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:27,685 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2019-11-06 18:53:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:27,741 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407079148] [2019-11-06 18:53:27,742 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:27,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933567742] [2019-11-06 18:53:27,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:27,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 18:53:27,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607694132] [2019-11-06 18:53:27,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:53:27,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:27,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:53:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:53:27,744 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2019-11-06 18:53:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:28,464 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2019-11-06 18:53:28,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:53:28,465 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-11-06 18:53:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:28,466 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:53:28,466 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:53:28,467 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:53:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:53:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2019-11-06 18:53:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:53:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-06 18:53:28,476 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 24 [2019-11-06 18:53:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:28,477 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-06 18:53:28,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:53:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-06 18:53:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:53:28,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:28,478 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:28,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:28,682 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash 534556445, now seen corresponding path program 3 times [2019-11-06 18:53:28,682 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:28,683 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148851512] [2019-11-06 18:53:28,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:28,702 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:28,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279272360] [2019-11-06 18:53:28,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:53:28,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:53:28,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:28,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:53:28,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:28,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148851512] [2019-11-06 18:53:28,856 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:28,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279272360] [2019-11-06 18:53:28,856 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:28,856 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:53:28,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555324131] [2019-11-06 18:53:28,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:53:28,857 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:28,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:53:28,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:53:28,858 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2019-11-06 18:53:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:29,099 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2019-11-06 18:53:29,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:53:29,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-06 18:53:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:29,101 INFO L225 Difference]: With dead ends: 83 [2019-11-06 18:53:29,101 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:53:29,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:53:29,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:53:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2019-11-06 18:53:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:53:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-06 18:53:29,117 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 26 [2019-11-06 18:53:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:29,117 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-06 18:53:29,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:53:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-06 18:53:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:53:29,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:29,118 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:29,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:29,319 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash 683531997, now seen corresponding path program 4 times [2019-11-06 18:53:29,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:29,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528687075] [2019-11-06 18:53:29,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:29,328 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:29,328 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788816232] [2019-11-06 18:53:29,329 INFO L92 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 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 [2019-11-06 18:53:29,375 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:53:29,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:29,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:53:29,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:29,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528687075] [2019-11-06 18:53:29,447 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:53:29,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788816232] [2019-11-06 18:53:29,447 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:53:29,447 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:53:29,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692652782] [2019-11-06 18:53:29,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:53:29,448 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:53:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:53:29,449 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2019-11-06 18:53:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:29,619 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-11-06 18:53:29,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:53:29,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-06 18:53:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:29,621 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:53:29,621 INFO L226 Difference]: Without dead ends: 68 [2019-11-06 18:53:29,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:53:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-06 18:53:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2019-11-06 18:53:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:53:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-06 18:53:29,632 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 26 [2019-11-06 18:53:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:29,632 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-06 18:53:29,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:53:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-06 18:53:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:53:29,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:29,633 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:29,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:29,838 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1746037861, now seen corresponding path program 5 times [2019-11-06 18:53:29,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:29,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734825814] [2019-11-06 18:53:29,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:29,855 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:53:29,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24020640] [2019-11-06 18:53:29,856 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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