/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/max.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:26:02,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:26:02,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:26:02,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:26:02,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:26:02,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:26:02,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:26:02,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:26:02,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:26:02,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:26:02,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:26:02,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:26:02,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:26:02,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:26:02,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:26:02,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:26:02,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:26:02,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:26:02,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:26:02,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:26:02,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:26:02,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:26:02,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:26:02,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:26:02,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:26:02,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:26:02,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:26:02,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:26:02,719 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 [2019-11-23 22:26:02,733 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:26:02,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:26:02,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:26:02,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:26:02,735 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:26:02,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:26:02,735 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:26:02,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:26:02,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:26:02,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:26:02,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:26:02,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:26:02,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:26:02,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:26:02,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:26:02,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:26:02,737 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:26:02,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:26:02,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:26:02,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:26:02,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:26:02,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:26:02,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:26:02,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:26:02,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:26:02,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:26:02,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:26:02,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:26:02,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:26:02,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:26:03,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:26:03,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:26:03,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:26:03,058 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:26:03,058 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:26:03,059 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max.i [2019-11-23 22:26:03,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd55108a/4250d626ebc34b1ab9d6379efaf36c27/FLAG4630f851f [2019-11-23 22:26:03,614 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:26:03,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max.i [2019-11-23 22:26:03,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd55108a/4250d626ebc34b1ab9d6379efaf36c27/FLAG4630f851f [2019-11-23 22:26:03,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd55108a/4250d626ebc34b1ab9d6379efaf36c27 [2019-11-23 22:26:03,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:26:03,978 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:26:03,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:03,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:26:03,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:26:03,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:03" (1/1) ... [2019-11-23 22:26:03,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1aceb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:03, skipping insertion in model container [2019-11-23 22:26:03,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:03" (1/1) ... [2019-11-23 22:26:03,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:26:04,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:26:04,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:04,221 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:26:04,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:04,264 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:26:04,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04 WrapperNode [2019-11-23 22:26:04,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:04,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:04,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:26:04,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:26:04,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:04,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:26:04,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:26:04,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:26:04,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (1/1) ... [2019-11-23 22:26:04,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:26:04,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:26:04,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:26:04,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:26:04,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (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 [2019-11-23 22:26:04,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:26:04,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:26:04,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:26:04,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:26:04,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:26:04,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:26:04,844 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:26:04,845 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 22:26:04,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:04 BoogieIcfgContainer [2019-11-23 22:26:04,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:26:04,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:26:04,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:26:04,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:26:04,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:26:03" (1/3) ... [2019-11-23 22:26:04,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a94562a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:04, skipping insertion in model container [2019-11-23 22:26:04,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:04" (2/3) ... [2019-11-23 22:26:04,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a94562a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:04, skipping insertion in model container [2019-11-23 22:26:04,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:04" (3/3) ... [2019-11-23 22:26:04,854 INFO L109 eAbstractionObserver]: Analyzing ICFG max.i [2019-11-23 22:26:04,864 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:26:04,870 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:26:04,881 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:26:04,904 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:26:04,904 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:26:04,904 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:26:04,904 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:26:04,905 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:26:04,905 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:26:04,905 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:26:04,905 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:26:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-23 22:26:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:26:04,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:04,925 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:04,926 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1699142909, now seen corresponding path program 1 times [2019-11-23 22:26:04,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:04,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545032030] [2019-11-23 22:26:04,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:26:05,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545032030] [2019-11-23 22:26:05,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:05,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:26:05,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662000974] [2019-11-23 22:26:05,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:26:05,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:26:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:26:05,081 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-23 22:26:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:05,098 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2019-11-23 22:26:05,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:26:05,099 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-11-23 22:26:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:05,107 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:26:05,108 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:26:05,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:26:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:26:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:26:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:26:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-23 22:26:05,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2019-11-23 22:26:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:05,145 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-23 22:26:05,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:26:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-23 22:26:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:26:05,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:05,147 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:05,148 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2103090409, now seen corresponding path program 1 times [2019-11-23 22:26:05,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:05,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910241019] [2019-11-23 22:26:05,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:26:05,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910241019] [2019-11-23 22:26:05,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:05,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:05,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704815528] [2019-11-23 22:26:05,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:05,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:05,268 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2019-11-23 22:26:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:05,340 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2019-11-23 22:26:05,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:05,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-23 22:26:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:05,341 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:26:05,342 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:26:05,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:26:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-11-23 22:26:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:26:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-23 22:26:05,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-11-23 22:26:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:05,351 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-23 22:26:05,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-23 22:26:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:26:05,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:05,352 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:05,352 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:05,353 INFO L82 PathProgramCache]: Analyzing trace with hash 777904804, now seen corresponding path program 1 times [2019-11-23 22:26:05,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:05,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612875084] [2019-11-23 22:26:05,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:26:05,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612875084] [2019-11-23 22:26:05,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:05,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:26:05,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772480493] [2019-11-23 22:26:05,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:26:05,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:26:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:05,480 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-23 22:26:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:05,574 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2019-11-23 22:26:05,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:05,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-23 22:26:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:05,576 INFO L225 Difference]: With dead ends: 53 [2019-11-23 22:26:05,576 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:26:05,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:26:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-11-23 22:26:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:26:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-11-23 22:26:05,583 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 20 [2019-11-23 22:26:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:05,584 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-11-23 22:26:05,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:26:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-11-23 22:26:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:26:05,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:05,585 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:05,586 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash 922969028, now seen corresponding path program 1 times [2019-11-23 22:26:05,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:05,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210055005] [2019-11-23 22:26:05,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:26:05,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210055005] [2019-11-23 22:26:05,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:05,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:26:05,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717321111] [2019-11-23 22:26:05,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:26:05,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:26:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:05,720 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2019-11-23 22:26:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:05,771 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-23 22:26:05,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:05,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-23 22:26:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:05,774 INFO L225 Difference]: With dead ends: 43 [2019-11-23 22:26:05,774 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:26:05,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:26:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 22:26:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:26:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-23 22:26:05,785 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 28 [2019-11-23 22:26:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:05,786 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-23 22:26:05,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:26:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-23 22:26:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:26:05,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:05,791 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:05,791 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:05,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:05,791 INFO L82 PathProgramCache]: Analyzing trace with hash -877480606, now seen corresponding path program 1 times [2019-11-23 22:26:05,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:05,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936971637] [2019-11-23 22:26:05,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:26:05,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936971637] [2019-11-23 22:26:05,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425612178] [2019-11-23 22:26:05,939 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 [2019-11-23 22:26:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:06,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:06,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:26:06,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:06,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 22:26:06,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9631867] [2019-11-23 22:26:06,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:26:06,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:26:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:06,108 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2019-11-23 22:26:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:06,184 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2019-11-23 22:26:06,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:26:06,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-23 22:26:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:06,186 INFO L225 Difference]: With dead ends: 61 [2019-11-23 22:26:06,186 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:26:06,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:26:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-23 22:26:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:26:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-23 22:26:06,193 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2019-11-23 22:26:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:06,193 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-23 22:26:06,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:26:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-23 22:26:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:26:06,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:06,195 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:06,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:06,398 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:06,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:06,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1033906211, now seen corresponding path program 2 times [2019-11-23 22:26:06,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:06,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100682472] [2019-11-23 22:26:06,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:26:06,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100682472] [2019-11-23 22:26:06,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587333857] [2019-11-23 22:26:06,494 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 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 [2019-11-23 22:26:06,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:06,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:06,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:06,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:26:06,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:06,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 22:26:06,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879967406] [2019-11-23 22:26:06,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:26:06,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:26:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:26:06,615 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 7 states. [2019-11-23 22:26:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:06,719 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2019-11-23 22:26:06,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:26:06,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-23 22:26:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:06,721 INFO L225 Difference]: With dead ends: 68 [2019-11-23 22:26:06,721 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:26:06,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:26:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-11-23 22:26:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:26:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-11-23 22:26:06,728 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 34 [2019-11-23 22:26:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:06,728 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-11-23 22:26:06,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:26:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-11-23 22:26:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:26:06,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:06,730 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:06,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:06,937 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:06,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1969265475, now seen corresponding path program 3 times [2019-11-23 22:26:06,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:06,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592734353] [2019-11-23 22:26:06,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:26:08,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592734353] [2019-11-23 22:26:08,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145938185] [2019-11-23 22:26:08,700 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 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 [2019-11-23 22:26:08,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:26:08,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:08,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 22:26:08,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:08,834 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:26:08,849 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2019-11-23 22:26:08,850 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:08,863 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:08,864 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:26:08,865 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2019-11-23 22:26:09,104 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:26:09,107 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:09,108 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 25 [2019-11-23 22:26:09,109 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:09,121 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:09,122 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:26:09,122 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:29 [2019-11-23 22:26:09,177 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:26:09,180 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:26:09,190 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:09,191 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 69 [2019-11-23 22:26:09,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:09,224 INFO L567 ElimStorePlain]: treesize reduction 21, result has 72.4 percent of original size [2019-11-23 22:26:09,225 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:26:09,226 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:52 [2019-11-23 22:26:09,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,460 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:26:09,476 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:09,476 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2019-11-23 22:26:09,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,482 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:09,489 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:26:09,521 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:09,522 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 67 [2019-11-23 22:26:09,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,533 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:09,678 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2019-11-23 22:26:09,680 INFO L567 ElimStorePlain]: treesize reduction 85, result has 36.6 percent of original size [2019-11-23 22:26:09,680 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:26:09,680 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:97, output treesize:49 [2019-11-23 22:26:09,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:26:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:26:09,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:09,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 40 [2019-11-23 22:26:09,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96954227] [2019-11-23 22:26:09,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:26:09,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:26:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:26:09,840 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 40 states. [2019-11-23 22:26:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:13,203 INFO L93 Difference]: Finished difference Result 253 states and 312 transitions. [2019-11-23 22:26:13,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 22:26:13,204 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2019-11-23 22:26:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:13,207 INFO L225 Difference]: With dead ends: 253 [2019-11-23 22:26:13,207 INFO L226 Difference]: Without dead ends: 229 [2019-11-23 22:26:13,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=575, Invalid=3847, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 22:26:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-11-23 22:26:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 105. [2019-11-23 22:26:13,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 22:26:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2019-11-23 22:26:13,229 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 42 [2019-11-23 22:26:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:13,230 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2019-11-23 22:26:13,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:26:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2019-11-23 22:26:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:26:13,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:13,232 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:13,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:13,436 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:13,436 INFO L82 PathProgramCache]: Analyzing trace with hash 520263487, now seen corresponding path program 1 times [2019-11-23 22:26:13,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:13,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481757046] [2019-11-23 22:26:13,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:21,584 WARN L192 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-23 22:26:29,455 WARN L192 SmtUtils]: Spent 7.81 s on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2019-11-23 22:26:41,990 WARN L192 SmtUtils]: Spent 12.47 s on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-11-23 22:26:52,875 WARN L192 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2019-11-23 22:27:10,025 WARN L192 SmtUtils]: Spent 16.93 s on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2019-11-23 22:27:27,028 WARN L192 SmtUtils]: Spent 12.33 s on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2019-11-23 22:27:42,416 WARN L192 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2019-11-23 22:27:51,518 WARN L192 SmtUtils]: Spent 4.98 s on a formula simplification. DAG size of input: 77 DAG size of output: 56