/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:48:01,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:48:01,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:48:01,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:48:01,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:48:01,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:48:01,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:48:01,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:48:01,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:48:01,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:48:01,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:48:01,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:48:01,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:48:01,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:48:01,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:48:01,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:48:01,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:48:01,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:48:01,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:48:01,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:48:01,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:48:01,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:48:01,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:48:01,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:48:01,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:48:01,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:48:01,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:48:01,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:48:01,743 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 [2020-07-19 21:48:01,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:48:01,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:48:01,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:48:01,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:48:01,759 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:48:01,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:48:01,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:48:01,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:48:01,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:48:01,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:48:01,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:48:01,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:48:01,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:48:01,761 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:48:01,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:48:01,762 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:48:01,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:48:01,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:48:01,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:48:01,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:48:01,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:48:01,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:48:01,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:48:01,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:48:01,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:48:01,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:48:01,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:48:01,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:48:01,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:48:01,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:48:02,060 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:48:02,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:48:02,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:48:02,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:48:02,079 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:48:02,080 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps3.c [2020-07-19 21:48:02,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aab1d729/24fc0cf37282419995ca37bc46da63e4/FLAG3b604b41d [2020-07-19 21:48:02,680 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:48:02,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3.c [2020-07-19 21:48:02,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aab1d729/24fc0cf37282419995ca37bc46da63e4/FLAG3b604b41d [2020-07-19 21:48:03,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aab1d729/24fc0cf37282419995ca37bc46da63e4 [2020-07-19 21:48:03,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:48:03,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:48:03,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:48:03,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:48:03,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:48:03,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e02ae07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03, skipping insertion in model container [2020-07-19 21:48:03,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:48:03,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:48:03,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:48:03,317 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:48:03,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:48:03,353 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:48:03,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03 WrapperNode [2020-07-19 21:48:03,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:48:03,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:48:03,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:48:03,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:48:03,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (1/1) ... [2020-07-19 21:48:03,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:48:03,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:48:03,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:48:03,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:48:03,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (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 [2020-07-19 21:48:03,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:48:03,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:48:03,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:48:03,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:48:03,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:48:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:48:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:48:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:48:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:48:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:48:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:48:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:48:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:48:03,727 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:48:03,728 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 21:48:03,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:03 BoogieIcfgContainer [2020-07-19 21:48:03,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:48:03,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:48:03,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:48:03,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:48:03,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:48:03" (1/3) ... [2020-07-19 21:48:03,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3d8014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:03, skipping insertion in model container [2020-07-19 21:48:03,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:03" (2/3) ... [2020-07-19 21:48:03,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3d8014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:03, skipping insertion in model container [2020-07-19 21:48:03,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:03" (3/3) ... [2020-07-19 21:48:03,741 INFO L109 eAbstractionObserver]: Analyzing ICFG ps3.c [2020-07-19 21:48:03,753 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:48:03,761 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:48:03,775 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:48:03,800 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:48:03,800 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:48:03,801 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:48:03,801 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:48:03,801 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:48:03,801 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:48:03,801 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:48:03,801 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:48:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 21:48:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:48:03,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:03,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:03,826 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:03,832 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-19 21:48:03,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:03,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107452274] [2020-07-19 21:48:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:48:03,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107452274] [2020-07-19 21:48:03,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:48:03,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 21:48:03,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799172684] [2020-07-19 21:48:03,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 21:48:03,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:03,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 21:48:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:48:03,971 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-19 21:48:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:03,996 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-19 21:48:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 21:48:03,998 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-19 21:48:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:04,009 INFO L225 Difference]: With dead ends: 35 [2020-07-19 21:48:04,009 INFO L226 Difference]: Without dead ends: 15 [2020-07-19 21:48:04,013 INFO L675 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 [2020-07-19 21:48:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-19 21:48:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-19 21:48:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-19 21:48:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-19 21:48:04,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-19 21:48:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:04,061 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-19 21:48:04,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 21:48:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-19 21:48:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:48:04,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:04,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:04,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:48:04,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:04,064 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-19 21:48:04,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:04,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195279600] [2020-07-19 21:48:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:04,073 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:04,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919629338] [2020-07-19 21:48:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:48:04,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:48:04,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195279600] [2020-07-19 21:48:04,250 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:04,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919629338] [2020-07-19 21:48:04,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:48:04,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:48:04,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206674866] [2020-07-19 21:48:04,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:48:04,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:04,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:48:04,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:48:04,256 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-19 21:48:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:04,333 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-19 21:48:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:48:04,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-19 21:48:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:04,335 INFO L225 Difference]: With dead ends: 25 [2020-07-19 21:48:04,335 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 21:48:04,338 INFO L675 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 [2020-07-19 21:48:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 21:48:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-19 21:48:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 21:48:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-19 21:48:04,360 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-19 21:48:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:04,361 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-19 21:48:04,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:48:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-19 21:48:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 21:48:04,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:04,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:04,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:48:04,581 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:04,582 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-19 21:48:04,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:04,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559876029] [2020-07-19 21:48:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:04,590 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:04,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568549010] [2020-07-19 21:48:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:48:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:48:04,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559876029] [2020-07-19 21:48:04,705 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:04,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568549010] [2020-07-19 21:48:04,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:04,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-19 21:48:04,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457980277] [2020-07-19 21:48:04,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:48:04,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:48:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:48:04,708 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-19 21:48:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:04,784 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-19 21:48:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:48:04,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-19 21:48:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:04,786 INFO L225 Difference]: With dead ends: 32 [2020-07-19 21:48:04,786 INFO L226 Difference]: Without dead ends: 29 [2020-07-19 21:48:04,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:48:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-19 21:48:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-19 21:48:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 21:48:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-19 21:48:04,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-19 21:48:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:04,797 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-19 21:48:04,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:48:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-19 21:48:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:48:04,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:04,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:05,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:05,014 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:05,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:05,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-19 21:48:05,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:05,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948152772] [2020-07-19 21:48:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:05,021 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:05,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100988122] [2020-07-19 21:48:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:48:05,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:48:05,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948152772] [2020-07-19 21:48:05,182 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:05,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100988122] [2020-07-19 21:48:05,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:05,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-19 21:48:05,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770433497] [2020-07-19 21:48:05,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:48:05,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:05,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:48:05,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:48:05,185 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-07-19 21:48:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:05,393 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-19 21:48:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:48:05,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-07-19 21:48:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:05,395 INFO L225 Difference]: With dead ends: 39 [2020-07-19 21:48:05,395 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:48:05,396 INFO L675 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 [2020-07-19 21:48:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:48:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 21:48:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 21:48:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 21:48:05,406 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2020-07-19 21:48:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:05,417 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 21:48:05,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:48:05,418 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 21:48:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:48:05,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:05,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:05,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:05,626 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:05,628 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-19 21:48:05,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:05,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95032088] [2020-07-19 21:48:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:05,637 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:05,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40870516] [2020-07-19 21:48:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 21:48:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 21:48:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95032088] [2020-07-19 21:48:05,840 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40870516] [2020-07-19 21:48:05,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:05,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-19 21:48:05,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753965657] [2020-07-19 21:48:05,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:48:05,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:48:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:48:05,843 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 10 states. [2020-07-19 21:48:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:06,024 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-19 21:48:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:48:06,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-19 21:48:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:06,026 INFO L225 Difference]: With dead ends: 46 [2020-07-19 21:48:06,026 INFO L226 Difference]: Without dead ends: 43 [2020-07-19 21:48:06,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:48:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-19 21:48:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-19 21:48:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 21:48:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-19 21:48:06,036 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2020-07-19 21:48:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:06,037 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-19 21:48:06,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:48:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-19 21:48:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 21:48:06,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:06,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:06,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:06,253 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-19 21:48:06,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:06,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767154387] [2020-07-19 21:48:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:06,261 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:06,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888551969] [2020-07-19 21:48:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 21:48:06,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-19 21:48:06,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767154387] [2020-07-19 21:48:06,608 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:06,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888551969] [2020-07-19 21:48:06,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:06,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-19 21:48:06,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700930393] [2020-07-19 21:48:06,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:48:06,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:48:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:48:06,615 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 11 states. [2020-07-19 21:48:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:06,852 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-07-19 21:48:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:48:06,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-07-19 21:48:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:06,855 INFO L225 Difference]: With dead ends: 53 [2020-07-19 21:48:06,855 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:48:06,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:48:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:48:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-19 21:48:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-19 21:48:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-07-19 21:48:06,865 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 38 [2020-07-19 21:48:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:06,866 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-07-19 21:48:06,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:48:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-07-19 21:48:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 21:48:06,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:06,868 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:07,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 21:48:07,072 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash 427058510, now seen corresponding path program 5 times [2020-07-19 21:48:07,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:07,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477636388] [2020-07-19 21:48:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:07,080 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:07,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617189936] [2020-07-19 21:48:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:07,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:48:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-19 21:48:07,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477636388] [2020-07-19 21:48:07,451 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:07,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617189936] [2020-07-19 21:48:07,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:07,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-19 21:48:07,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800626414] [2020-07-19 21:48:07,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:48:07,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:07,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:48:07,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:48:07,454 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 13 states. [2020-07-19 21:48:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:09,865 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-19 21:48:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:48:09,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-07-19 21:48:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:09,868 INFO L225 Difference]: With dead ends: 60 [2020-07-19 21:48:09,868 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 21:48:09,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:48:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 21:48:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 21:48:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:48:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 21:48:09,880 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 45 [2020-07-19 21:48:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:09,880 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 21:48:09,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:48:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 21:48:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 21:48:09,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:09,882 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:10,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:10,087 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash 174118353, now seen corresponding path program 6 times [2020-07-19 21:48:10,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:10,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325704828] [2020-07-19 21:48:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:10,094 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:10,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070820721] [2020-07-19 21:48:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:10,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:48:10,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-19 21:48:10,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325704828] [2020-07-19 21:48:10,643 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:10,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070820721] [2020-07-19 21:48:10,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:10,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-19 21:48:10,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079888483] [2020-07-19 21:48:10,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:48:10,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:48:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:48:10,646 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-07-19 21:48:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:11,024 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-07-19 21:48:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:48:11,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-19 21:48:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:11,031 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:48:11,031 INFO L226 Difference]: Without dead ends: 64 [2020-07-19 21:48:11,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:48:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-19 21:48:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-19 21:48:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-19 21:48:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-07-19 21:48:11,045 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 52 [2020-07-19 21:48:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:11,045 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-07-19 21:48:11,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:48:11,046 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-07-19 21:48:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-19 21:48:11,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:11,048 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:11,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:11,256 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash 600857582, now seen corresponding path program 7 times [2020-07-19 21:48:11,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:11,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771041964] [2020-07-19 21:48:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:11,263 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:11,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581421528] [2020-07-19 21:48:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:12,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 21:48:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-07-19 21:48:12,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771041964] [2020-07-19 21:48:12,639 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:12,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581421528] [2020-07-19 21:48:12,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:12,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-19 21:48:12,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432659661] [2020-07-19 21:48:12,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:48:12,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:48:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:48:12,641 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 15 states. [2020-07-19 21:48:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:13,043 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-07-19 21:48:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:48:13,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-07-19 21:48:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:13,046 INFO L225 Difference]: With dead ends: 74 [2020-07-19 21:48:13,046 INFO L226 Difference]: Without dead ends: 71 [2020-07-19 21:48:13,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:48:13,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-19 21:48:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-07-19 21:48:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-19 21:48:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-07-19 21:48:13,058 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 59 [2020-07-19 21:48:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:13,058 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-07-19 21:48:13,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:48:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-07-19 21:48:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 21:48:13,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:13,060 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:13,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 21:48:13,266 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:13,266 INFO L82 PathProgramCache]: Analyzing trace with hash 25176881, now seen corresponding path program 8 times [2020-07-19 21:48:13,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:13,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347483194] [2020-07-19 21:48:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:13,272 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:13,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664153644] [2020-07-19 21:48:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-19 21:48:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 41 proven. 111 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-19 21:48:17,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347483194] [2020-07-19 21:48:17,999 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:17,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664153644] [2020-07-19 21:48:17,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:17,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-19 21:48:18,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824804113] [2020-07-19 21:48:18,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:48:18,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:48:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=237, Unknown=1, NotChecked=0, Total=272 [2020-07-19 21:48:18,001 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 17 states. [2020-07-19 21:48:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:18,739 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-07-19 21:48:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:48:18,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-07-19 21:48:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:18,741 INFO L225 Difference]: With dead ends: 81 [2020-07-19 21:48:18,741 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 21:48:18,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=45, Invalid=296, Unknown=1, NotChecked=0, Total=342 [2020-07-19 21:48:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 21:48:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-19 21:48:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-19 21:48:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-19 21:48:18,755 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 66 [2020-07-19 21:48:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:18,756 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-19 21:48:18,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:48:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-19 21:48:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 21:48:18,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:18,757 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:18,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:18,964 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:18,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1948793486, now seen corresponding path program 9 times [2020-07-19 21:48:18,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:18,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917334178] [2020-07-19 21:48:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:18,971 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:18,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331711574] [2020-07-19 21:48:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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 [2020-07-19 21:48:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 21:48:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 49 proven. 137 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-19 21:48:21,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917334178] [2020-07-19 21:48:21,986 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:21,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331711574] [2020-07-19 21:48:21,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:21,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-19 21:48:21,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146171867] [2020-07-19 21:48:21,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:48:21,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:21,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:48:21,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:48:21,988 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2020-07-19 21:48:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:23,021 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-07-19 21:48:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:48:23,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-07-19 21:48:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:23,024 INFO L225 Difference]: With dead ends: 88 [2020-07-19 21:48:23,024 INFO L226 Difference]: Without dead ends: 85 [2020-07-19 21:48:23,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:48:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-19 21:48:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-19 21:48:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 21:48:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-07-19 21:48:23,039 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 73 [2020-07-19 21:48:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:23,039 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-07-19 21:48:23,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:48:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-07-19 21:48:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-19 21:48:23,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:23,041 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:23,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:23,251 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash 586061969, now seen corresponding path program 10 times [2020-07-19 21:48:23,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:23,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504893310] [2020-07-19 21:48:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a [2020-07-19 21:48:23,258 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:23,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321793525] [2020-07-19 21:48:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fc23d8a 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