/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/nla-digbench/ps6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:26:38,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:26:38,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:26:38,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:26:38,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:26:38,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:26:38,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:26:38,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:26:38,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:26:38,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:26:38,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:26:38,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:26:38,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:26:38,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:26:38,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:26:38,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:26:38,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:26:38,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:26:38,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:26:38,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:26:38,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:26:38,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:26:38,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:26:38,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:26:38,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:26:38,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:26:38,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:26:38,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:26:38,494 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 21:26:38,513 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:26:38,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:26:38,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:26:38,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:26:38,515 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:26:38,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:26:38,516 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:26:38,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:26:38,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:26:38,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:26:38,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:26:38,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:26:38,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:26:38,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:26:38,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:26:38,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:26:38,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:26:38,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:26:38,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:26:38,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:26:38,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:26:38,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:26:38,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:26:38,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:26:38,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:26:38,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:26:38,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:26:38,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:26:38,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:26:38,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:26:38,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:26:38,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:26:38,805 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:26:38,806 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:26:38,806 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6.c [2019-11-06 21:26:38,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20b000bb9/cc465ab015924bdda7d4a212556993d0/FLAGa47a5fb52 [2019-11-06 21:26:39,324 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:26:39,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6.c [2019-11-06 21:26:39,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20b000bb9/cc465ab015924bdda7d4a212556993d0/FLAGa47a5fb52 [2019-11-06 21:26:39,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20b000bb9/cc465ab015924bdda7d4a212556993d0 [2019-11-06 21:26:39,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:26:39,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:26:39,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:39,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:26:39,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:26:39,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:39,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c96835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39, skipping insertion in model container [2019-11-06 21:26:39,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:39,770 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:26:39,791 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:26:39,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:39,951 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:26:39,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:39,981 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:26:39,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39 WrapperNode [2019-11-06 21:26:39,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:39,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:26:39,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:26:39,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:26:40,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:40,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:40,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:40,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:40,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:40,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:40,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:40,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:26:40,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:26:40,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:26:40,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:26:40,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (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 21:26:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:26:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:26:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:26:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:26:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:26:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:26:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:26:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:26:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:26:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:26:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:26:40,323 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:26:40,324 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:26:40,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:40 BoogieIcfgContainer [2019-11-06 21:26:40,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:26:40,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:26:40,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:26:40,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:26:40,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:26:39" (1/3) ... [2019-11-06 21:26:40,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a352565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:40, skipping insertion in model container [2019-11-06 21:26:40,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39" (2/3) ... [2019-11-06 21:26:40,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a352565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:40, skipping insertion in model container [2019-11-06 21:26:40,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:40" (3/3) ... [2019-11-06 21:26:40,352 INFO L109 eAbstractionObserver]: Analyzing ICFG ps6.c [2019-11-06 21:26:40,372 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:26:40,382 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:26:40,415 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:26:40,453 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:26:40,453 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:26:40,453 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:26:40,454 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:26:40,454 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:26:40,454 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:26:40,454 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:26:40,454 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:26:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-06 21:26:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:40,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:40,475 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:40,476 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-11-06 21:26:40,489 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:40,489 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798765071] [2019-11-06 21:26:40,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:40,582 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 21:26:40,582 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798765071] [2019-11-06 21:26:40,583 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:40,583 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:26:40,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170939203] [2019-11-06 21:26:40,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:26:40,589 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:26:40,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:40,601 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-06 21:26:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:40,626 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-11-06 21:26:40,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:26:40,627 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:26:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:40,637 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:26:40,637 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:26:40,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:26:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:26:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:26:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-06 21:26:40,681 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-06 21:26:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:40,682 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-06 21:26:40,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:26:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-06 21:26:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:40,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:40,684 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:40,685 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-11-06 21:26:40,685 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:40,686 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736713074] [2019-11-06 21:26:40,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:40,693 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:40,694 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159220242] [2019-11-06 21:26:40,694 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 21:26:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:40,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 21:26:40,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:40,889 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 21:26:40,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736713074] [2019-11-06 21:26:40,891 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:40,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159220242] [2019-11-06 21:26:40,892 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:40,892 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:26:40,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233741145] [2019-11-06 21:26:40,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:26:40,895 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:40,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:26:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:26:40,896 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-11-06 21:26:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:40,990 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-06 21:26:40,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:26:40,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:26:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:40,992 INFO L225 Difference]: With dead ends: 27 [2019-11-06 21:26:40,993 INFO L226 Difference]: Without dead ends: 23 [2019-11-06 21:26:40,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:26:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-06 21:26:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-06 21:26:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 21:26:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-06 21:26:41,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-11-06 21:26:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:41,012 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-06 21:26:41,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:26:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-06 21:26:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 21:26:41,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:41,015 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:41,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:41,219 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-11-06 21:26:41,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:41,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404430641] [2019-11-06 21:26:41,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:41,227 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:41,229 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993163797] [2019-11-06 21:26:41,229 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 21:26:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:41,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 21:26:41,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:41,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404430641] [2019-11-06 21:26:41,403 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:41,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993163797] [2019-11-06 21:26:41,403 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:41,404 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:26:41,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494394119] [2019-11-06 21:26:41,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:26:41,405 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:41,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:26:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:41,407 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-11-06 21:26:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:41,747 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 21:26:41,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:26:41,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-06 21:26:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:41,750 INFO L225 Difference]: With dead ends: 34 [2019-11-06 21:26:41,750 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 21:26:41,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 21:26:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-06 21:26:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 21:26:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-11-06 21:26:41,769 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-11-06 21:26:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:41,769 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-11-06 21:26:41,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:26:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-11-06 21:26:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 21:26:41,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:41,772 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:41,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:41,976 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-11-06 21:26:41,978 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:41,978 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051619106] [2019-11-06 21:26:41,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:41,984 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:41,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141590790] [2019-11-06 21:26:41,985 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 21:26:42,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:42,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:42,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:42,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:42,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051619106] [2019-11-06 21:26:42,141 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:42,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141590790] [2019-11-06 21:26:42,142 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:42,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:42,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809748609] [2019-11-06 21:26:42,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:42,143 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:42,144 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-11-06 21:26:42,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:42,425 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-11-06 21:26:42,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:26:42,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-11-06 21:26:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:42,427 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:26:42,428 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 21:26:42,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 21:26:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 21:26:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:26:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-06 21:26:42,437 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-11-06 21:26:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:42,438 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-06 21:26:42,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-06 21:26:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:26:42,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:42,439 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:42,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:42,642 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-11-06 21:26:42,644 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:42,644 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86446221] [2019-11-06 21:26:42,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:42,649 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:42,649 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767084268] [2019-11-06 21:26:42,649 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 21:26:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:42,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 21:26:42,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:42,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:26:42,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86446221] [2019-11-06 21:26:42,810 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:42,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767084268] [2019-11-06 21:26:42,810 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:42,810 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:42,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113680607] [2019-11-06 21:26:42,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:42,811 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:42,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:42,812 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2019-11-06 21:26:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:43,094 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-11-06 21:26:43,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:26:43,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-06 21:26:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:43,097 INFO L225 Difference]: With dead ends: 46 [2019-11-06 21:26:43,097 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 21:26:43,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:26:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 21:26:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 21:26:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:26:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-06 21:26:43,106 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-11-06 21:26:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:43,106 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-06 21:26:43,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-06 21:26:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:26:43,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:43,111 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:43,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:43,312 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-11-06 21:26:43,313 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:43,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796679729] [2019-11-06 21:26:43,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:43,320 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:43,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470123529] [2019-11-06 21:26:43,321 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 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 21:26:43,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:26:43,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:43,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:26:43,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:44,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,081 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))))) is different from false [2019-11-06 21:26:56,113 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) (= 0 c___VERIFIER_assert_~cond)) (= 1 c___VERIFIER_assert_~cond)) is different from false [2019-11-06 21:27:02,144 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) is different from false [2019-11-06 21:27:04,147 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) is different from true [2019-11-06 21:27:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 1 not checked. [2019-11-06 21:27:04,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796679729] [2019-11-06 21:27:04,154 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:04,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470123529] [2019-11-06 21:27:04,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:04,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:27:04,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420532707] [2019-11-06 21:27:04,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:27:04,155 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:27:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=4, NotChecked=24, Total=56 [2019-11-06 21:27:04,156 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2019-11-06 21:27:06,200 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 48 DAG size of output: 3 [2019-11-06 21:27:08,264 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 51 DAG size of output: 6 [2019-11-06 21:27:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:08,460 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-11-06 21:27:08,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:27:08,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-11-06 21:27:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:08,462 INFO L225 Difference]: With dead ends: 46 [2019-11-06 21:27:08,463 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:27:08,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=26, Invalid=38, Unknown=4, NotChecked=42, Total=110 [2019-11-06 21:27:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:27:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2019-11-06 21:27:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 21:27:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-06 21:27:08,471 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 31 [2019-11-06 21:27:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:08,472 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-06 21:27:08,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:27:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-06 21:27:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 21:27:08,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:08,473 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:08,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:08,678 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:08,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:08,679 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-11-06 21:27:08,679 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:08,680 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514081301] [2019-11-06 21:27:08,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:08,686 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:08,686 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386129854] [2019-11-06 21:27:08,687 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 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 21:27:08,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:27:08,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:08,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 21:27:08,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:08,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:27:08,854 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514081301] [2019-11-06 21:27:08,854 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:08,854 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386129854] [2019-11-06 21:27:08,854 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:08,854 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:27:08,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178068692] [2019-11-06 21:27:08,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:27:08,855 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:27:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:08,856 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2019-11-06 21:27:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:09,033 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-11-06 21:27:09,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:09,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-11-06 21:27:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:09,035 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:27:09,035 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 21:27:09,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:27:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 21:27:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-06 21:27:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 21:27:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-06 21:27:09,043 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 35 [2019-11-06 21:27:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:09,043 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-06 21:27:09,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-06 21:27:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:27:09,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:09,045 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:09,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:09,248 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-11-06 21:27:09,249 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:09,249 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821617518] [2019-11-06 21:27:09,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:09,254 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:09,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313915162] [2019-11-06 21:27:09,255 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 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 21:27:09,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 21:27:09,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:09,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:27:09,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:10,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 21:27:10,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821617518] [2019-11-06 21:27:10,325 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:10,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313915162] [2019-11-06 21:27:10,325 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:10,325 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:27:10,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619767409] [2019-11-06 21:27:10,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:27:10,326 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:27:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:10,327 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2019-11-06 21:27:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:10,537 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-11-06 21:27:10,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:27:10,538 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-11-06 21:27:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:10,539 INFO L225 Difference]: With dead ends: 46 [2019-11-06 21:27:10,539 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 21:27:10,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:27:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 21:27:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 21:27:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:27:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-06 21:27:10,548 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 42 [2019-11-06 21:27:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:10,549 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-06 21:27:10,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:27:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-06 21:27:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 21:27:10,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:10,553 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:10,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:10,756 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-11-06 21:27:10,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:10,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841641013] [2019-11-06 21:27:10,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:10,764 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:10,764 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569530308] [2019-11-06 21:27:10,764 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 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 [2019-11-06 21:27:10,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:27:10,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:10,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 21:27:10,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:10,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 21:27:10,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841641013] [2019-11-06 21:27:10,956 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:10,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569530308] [2019-11-06 21:27:10,957 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:10,957 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:27:10,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748623449] [2019-11-06 21:27:10,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:27:10,958 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:27:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:10,958 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 12 states. [2019-11-06 21:27:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:11,182 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2019-11-06 21:27:11,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:27:11,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-06 21:27:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:11,184 INFO L225 Difference]: With dead ends: 49 [2019-11-06 21:27:11,184 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 21:27:11,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:27:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 21:27:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-06 21:27:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 21:27:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-11-06 21:27:11,194 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 49 [2019-11-06 21:27:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:11,194 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-11-06 21:27:11,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:27:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-11-06 21:27:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 21:27:11,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:11,196 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:11,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:11,399 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:11,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-11-06 21:27:11,400 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:11,400 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174327035] [2019-11-06 21:27:11,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:11,406 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:11,406 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157383255] [2019-11-06 21:27:11,406 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 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 [2019-11-06 21:27:11,476 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 21:27:11,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:11,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-06 21:27:11,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:13,531 WARN L860 $PredicateComparison]: unable to prove that (and (= 0 (mod (+ (* (* (* (* (* (* c_main_~y~0 (- 2)) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) (* (* (* (* (* c_main_~y~0 5) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11) (* c_main_~y~0 c_main_~y~0) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11)) (- 12))) (= c_main_~c~0 1) (= c_main_~y~0 1)) is different from true [2019-11-06 21:27:13,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 5 not checked. [2019-11-06 21:27:13,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174327035] [2019-11-06 21:27:13,653 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:13,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157383255] [2019-11-06 21:27:13,653 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:13,653 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 21:27:13,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880326561] [2019-11-06 21:27:13,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 21:27:13,656 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:13,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 21:27:13,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2019-11-06 21:27:13,656 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 14 states. [2019-11-06 21:27:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:13,886 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-11-06 21:27:13,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 21:27:13,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-11-06 21:27:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:13,887 INFO L225 Difference]: With dead ends: 52 [2019-11-06 21:27:13,888 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:27:13,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2019-11-06 21:27:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:27:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 21:27:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 21:27:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-06 21:27:13,897 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 56 [2019-11-06 21:27:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:13,897 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-06 21:27:13,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 21:27:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-06 21:27:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 21:27:13,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:13,899 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:14,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:14,104 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-11-06 21:27:14,104 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:14,104 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493938967] [2019-11-06 21:27:14,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:14,109 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:14,109 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916192069] [2019-11-06 21:27:14,109 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:14,434 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 21:27:14,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:14,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-06 21:27:14,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:14,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 21:27:14,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493938967] [2019-11-06 21:27:14,649 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:14,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916192069] [2019-11-06 21:27:14,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:14,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-06 21:27:14,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199731106] [2019-11-06 21:27:14,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 21:27:14,650 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 21:27:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:27:14,651 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 15 states. [2019-11-06 21:27:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:14,899 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-11-06 21:27:14,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 21:27:14,902 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-06 21:27:14,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:14,904 INFO L225 Difference]: With dead ends: 55 [2019-11-06 21:27:14,904 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 21:27:14,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:27:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 21:27:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-06 21:27:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 21:27:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-11-06 21:27:14,912 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 63 [2019-11-06 21:27:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:14,913 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-11-06 21:27:14,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 21:27:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-11-06 21:27:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 21:27:14,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:14,915 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:15,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:15,118 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:15,119 INFO L82 PathProgramCache]: Analyzing trace with hash 855290405, now seen corresponding path program 7 times [2019-11-06 21:27:15,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:15,120 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992786381] [2019-11-06 21:27:15,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:15,128 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:15,128 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403083927] [2019-11-06 21:27:15,129 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:15,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-06 21:27:15,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:17,018 WARN L191 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-11-06 21:27:17,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 34 proven. 110 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 21:27:17,095 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992786381] [2019-11-06 21:27:17,095 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:17,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403083927] [2019-11-06 21:27:17,096 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:17,096 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-06 21:27:17,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296295585] [2019-11-06 21:27:17,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:27:17,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:27:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:27:17,097 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 16 states. [2019-11-06 21:27:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:21,236 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-11-06 21:27:21,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 21:27:21,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-11-06 21:27:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:21,238 INFO L225 Difference]: With dead ends: 60 [2019-11-06 21:27:21,238 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 21:27:21,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:27:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 21:27:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-06 21:27:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 21:27:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-06 21:27:21,249 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 70 [2019-11-06 21:27:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:21,249 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-06 21:27:21,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:27:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-06 21:27:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 21:27:21,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:21,251 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:21,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:21,454 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1484740595, now seen corresponding path program 8 times [2019-11-06 21:27:21,455 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:21,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553953561] [2019-11-06 21:27:21,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:21,463 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:21,463 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863956853] [2019-11-06 21:27:21,464 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 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 [2019-11-06 21:27:21,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:27:21,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:21,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-06 21:27:21,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:21,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 19 proven. 136 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-06 21:27:21,724 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553953561] [2019-11-06 21:27:21,725 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:21,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863956853] [2019-11-06 21:27:21,725 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:21,725 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-06 21:27:21,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446243727] [2019-11-06 21:27:21,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:27:21,726 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:21,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:27:21,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:27:21,726 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 16 states. [2019-11-06 21:27:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:22,044 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2019-11-06 21:27:22,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 21:27:22,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2019-11-06 21:27:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:22,046 INFO L225 Difference]: With dead ends: 65 [2019-11-06 21:27:22,046 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 21:27:22,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:27:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 21:27:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-06 21:27:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 21:27:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-11-06 21:27:22,056 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 77 [2019-11-06 21:27:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:22,057 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-11-06 21:27:22,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:27:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-11-06 21:27:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-06 21:27:22,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:22,058 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:22,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:22,262 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:22,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:22,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1487028955, now seen corresponding path program 9 times [2019-11-06 21:27:22,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:22,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089826414] [2019-11-06 21:27:22,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:22,268 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:22,269 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978847] [2019-11-06 21:27:22,269 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 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 [2019-11-06 21:27:22,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 21:27:22,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:22,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-06 21:27:22,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:22,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 21:27:22,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089826414] [2019-11-06 21:27:22,556 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:22,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978847] [2019-11-06 21:27:22,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:22,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-06 21:27:22,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356155951] [2019-11-06 21:27:22,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:27:22,557 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:22,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:27:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:27:22,558 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 18 states. [2019-11-06 21:27:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:22,992 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2019-11-06 21:27:22,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 21:27:22,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-11-06 21:27:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:22,997 INFO L225 Difference]: With dead ends: 68 [2019-11-06 21:27:22,997 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 21:27:22,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:27:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 21:27:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-06 21:27:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 21:27:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2019-11-06 21:27:23,013 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 84 [2019-11-06 21:27:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:23,014 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2019-11-06 21:27:23,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:27:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2019-11-06 21:27:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 21:27:23,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:23,016 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:23,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:23,225 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:23,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1163182835, now seen corresponding path program 10 times [2019-11-06 21:27:23,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:23,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497577461] [2019-11-06 21:27:23,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:23,231 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:23,232 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170447177] [2019-11-06 21:27:23,232 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 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 [2019-11-06 21:27:23,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:27:23,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:23,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-06 21:27:23,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:25,350 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~y~0 0) (= 0 (mod (+ (* (* (* (* (* (* c_main_~y~0 (- 2)) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) (* (* (* (* (* c_main_~y~0 5) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11) (* c_main_~y~0 c_main_~y~0) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11)) (- 12))) (= c_main_~c~0 0)) is different from true [2019-11-06 21:27:27,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 23 proven. 189 refuted. 0 times theorem prover too weak. 231 trivial. 10 not checked. [2019-11-06 21:27:27,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497577461] [2019-11-06 21:27:27,568 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:27,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170447177] [2019-11-06 21:27:27,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:27,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-06 21:27:27,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840376134] [2019-11-06 21:27:27,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 21:27:27,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 21:27:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=272, Unknown=2, NotChecked=32, Total=342 [2019-11-06 21:27:27,570 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 19 states. [2019-11-06 21:27:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:27,980 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-06 21:27:27,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 21:27:27,980 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-11-06 21:27:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:27,982 INFO L225 Difference]: With dead ends: 71 [2019-11-06 21:27:27,982 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 21:27:27,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=51, Invalid=371, Unknown=2, NotChecked=38, Total=462 [2019-11-06 21:27:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 21:27:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-06 21:27:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 21:27:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-11-06 21:27:27,992 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 91 [2019-11-06 21:27:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:27,992 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-11-06 21:27:27,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 21:27:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-11-06 21:27:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 21:27:27,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:27,994 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:28,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:28,202 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1609463771, now seen corresponding path program 11 times [2019-11-06 21:27:28,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:28,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514129903] [2019-11-06 21:27:28,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:28,215 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:28,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612011363] [2019-11-06 21:27:28,215 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 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 [2019-11-06 21:27:28,335 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 21:27:28,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:28,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 60 conjunts are in the unsatisfiable core [2019-11-06 21:27:28,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:28,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 31 proven. 229 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 21:27:28,564 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514129903] [2019-11-06 21:27:28,564 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:28,564 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612011363] [2019-11-06 21:27:28,564 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:28,564 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-06 21:27:28,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066295814] [2019-11-06 21:27:28,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 21:27:28,565 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 21:27:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:27:28,565 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 19 states. [2019-11-06 21:27:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:29,088 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-11-06 21:27:29,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 21:27:29,089 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2019-11-06 21:27:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:29,090 INFO L225 Difference]: With dead ends: 74 [2019-11-06 21:27:29,090 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 21:27:29,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:27:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 21:27:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-06 21:27:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-06 21:27:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-11-06 21:27:29,101 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 98 [2019-11-06 21:27:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:29,102 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-11-06 21:27:29,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 21:27:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-11-06 21:27:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-06 21:27:29,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:29,104 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:29,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:29,308 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1322446323, now seen corresponding path program 12 times [2019-11-06 21:27:29,309 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:29,309 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402569918] [2019-11-06 21:27:29,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:29,314 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:29,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781814997] [2019-11-06 21:27:29,314 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:30,337 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 21:27:30,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:30,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 66 conjunts are in the unsatisfiable core [2019-11-06 21:27:30,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:30,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 27 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-06 21:27:30,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402569918] [2019-11-06 21:27:30,618 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:30,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781814997] [2019-11-06 21:27:30,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:30,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-06 21:27:30,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669813469] [2019-11-06 21:27:30,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 21:27:30,619 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 21:27:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:27:30,620 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 21 states. [2019-11-06 21:27:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:31,130 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2019-11-06 21:27:31,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 21:27:31,136 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2019-11-06 21:27:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:31,137 INFO L225 Difference]: With dead ends: 77 [2019-11-06 21:27:31,137 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 21:27:31,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:27:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 21:27:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-06 21:27:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 21:27:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2019-11-06 21:27:31,152 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 105 [2019-11-06 21:27:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:31,154 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2019-11-06 21:27:31,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 21:27:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2019-11-06 21:27:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 21:27:31,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:31,157 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:31,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:31,362 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash -523889883, now seen corresponding path program 13 times [2019-11-06 21:27:31,363 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:31,363 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550356202] [2019-11-06 21:27:31,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:31,367 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:31,368 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914100005] [2019-11-06 21:27:31,368 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:31,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-06 21:27:31,437 INFO L279 TraceCheckSpWp]: Computing forward predicates...