/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/sep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:27:54,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:27:54,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:27:54,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:27:54,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:27:54,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:27:54,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:27:54,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:27:54,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:27:54,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:27:54,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:27:54,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:27:54,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:27:54,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:27:54,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:27:54,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:27:54,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:27:54,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:27:54,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:27:54,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:27:54,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:27:54,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:27:54,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:27:54,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:27:54,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:27:54,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:27:54,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:27:54,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:27:54,163 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 22:27:54,185 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:27:54,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:27:54,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:27:54,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:27:54,187 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:27:54,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:27:54,187 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:27:54,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:27:54,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:27:54,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:27:54,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:27:54,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:27:54,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:27:54,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:27:54,189 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:27:54,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:27:54,189 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:27:54,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:27:54,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:27:54,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:27:54,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:27:54,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:27:54,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:27:54,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:27:54,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:27:54,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:27:54,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:27:54,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:27:54,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:27:54,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:27:54,487 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:27:54,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:27:54,509 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:27:54,511 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:27:54,513 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:27:54,515 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep.i [2019-11-23 22:27:54,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01052d3e4/e7750efa8c084d18a2f7dab08ae07073/FLAGc5a5d7f43 [2019-11-23 22:27:55,045 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:27:55,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep.i [2019-11-23 22:27:55,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01052d3e4/e7750efa8c084d18a2f7dab08ae07073/FLAGc5a5d7f43 [2019-11-23 22:27:55,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01052d3e4/e7750efa8c084d18a2f7dab08ae07073 [2019-11-23 22:27:55,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:27:55,434 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:27:55,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:27:55,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:27:55,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:27:55,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b11ee8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55, skipping insertion in model container [2019-11-23 22:27:55,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:27:55,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:27:55,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:27:55,658 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:27:55,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:27:55,691 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:27:55,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55 WrapperNode [2019-11-23 22:27:55,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:27:55,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:27:55,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:27:55,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:27:55,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:27:55,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:27:55,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:27:55,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:27:55,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (1/1) ... [2019-11-23 22:27:55,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:27:55,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:27:55,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:27:55,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:27:55,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (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 22:27:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:27:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:27:55,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:27:55,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:27:55,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:27:55,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:27:56,300 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:27:56,300 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 22:27:56,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:56 BoogieIcfgContainer [2019-11-23 22:27:56,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:27:56,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:27:56,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:27:56,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:27:56,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:27:55" (1/3) ... [2019-11-23 22:27:56,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5207bf32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:56, skipping insertion in model container [2019-11-23 22:27:56,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:55" (2/3) ... [2019-11-23 22:27:56,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5207bf32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:56, skipping insertion in model container [2019-11-23 22:27:56,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:56" (3/3) ... [2019-11-23 22:27:56,310 INFO L109 eAbstractionObserver]: Analyzing ICFG sep.i [2019-11-23 22:27:56,321 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:27:56,329 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:27:56,341 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:27:56,363 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:27:56,363 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:27:56,364 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:27:56,364 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:27:56,364 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:27:56,364 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:27:56,364 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:27:56,364 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:27:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-23 22:27:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:27:56,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:56,385 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:56,385 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:56,390 INFO L82 PathProgramCache]: Analyzing trace with hash -805411982, now seen corresponding path program 1 times [2019-11-23 22:27:56,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:56,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145088073] [2019-11-23 22:27:56,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:56,537 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 22:27:56,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145088073] [2019-11-23 22:27:56,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:56,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:27:56,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757847013] [2019-11-23 22:27:56,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:27:56,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:27:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:27:56,565 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-23 22:27:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:56,591 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:27:56,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:27:56,594 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-11-23 22:27:56,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:56,607 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:27:56,607 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:27:56,612 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 22:27:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:27:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 22:27:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:27:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-23 22:27:56,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2019-11-23 22:27:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:56,658 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-23 22:27:56,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:27:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-23 22:27:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:27:56,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:56,660 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:56,661 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1872946201, now seen corresponding path program 1 times [2019-11-23 22:27:56,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:56,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222250159] [2019-11-23 22:27:56,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:56,841 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 22:27:56,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222250159] [2019-11-23 22:27:56,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:56,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:56,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106590805] [2019-11-23 22:27:56,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:56,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:56,849 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 3 states. [2019-11-23 22:27:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:56,922 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2019-11-23 22:27:56,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:56,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-23 22:27:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:56,923 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:27:56,924 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:27:56,925 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 22:27:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:27:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-11-23 22:27:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:27:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-11-23 22:27:56,932 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2019-11-23 22:27:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:56,932 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-11-23 22:27:56,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-11-23 22:27:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:27:56,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:56,934 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:56,934 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:56,935 INFO L82 PathProgramCache]: Analyzing trace with hash -567209286, now seen corresponding path program 1 times [2019-11-23 22:27:56,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:56,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175252614] [2019-11-23 22:27:56,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:57,033 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 22:27:57,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175252614] [2019-11-23 22:27:57,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:57,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:27:57,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578920721] [2019-11-23 22:27:57,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:57,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:57,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:57,036 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2019-11-23 22:27:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:57,109 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-11-23 22:27:57,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:57,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 22:27:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:57,111 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:27:57,111 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:27:57,112 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 22:27:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:27:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2019-11-23 22:27:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:27:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-23 22:27:57,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2019-11-23 22:27:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:57,119 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-23 22:27:57,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-23 22:27:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:27:57,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:57,120 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] [2019-11-23 22:27:57,121 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2050984225, now seen corresponding path program 1 times [2019-11-23 22:27:57,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:57,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710985137] [2019-11-23 22:27:57,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:57,217 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 22:27:57,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710985137] [2019-11-23 22:27:57,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:57,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:27:57,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993978674] [2019-11-23 22:27:57,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:57,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:57,224 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 4 states. [2019-11-23 22:27:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:57,285 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-11-23 22:27:57,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:57,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-23 22:27:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:57,287 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:27:57,287 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:27:57,288 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 22:27:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:27:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:27:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:27:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-23 22:27:57,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 25 [2019-11-23 22:27:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:57,294 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-23 22:27:57,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-23 22:27:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:27:57,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:57,296 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] [2019-11-23 22:27:57,296 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:57,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1500824769, now seen corresponding path program 1 times [2019-11-23 22:27:57,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:57,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854909556] [2019-11-23 22:27:57,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:57,388 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 22:27:57,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854909556] [2019-11-23 22:27:57,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155590238] [2019-11-23 22:27:57,389 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 22:27:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:57,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:57,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:57,546 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 22:27:57,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:57,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 22:27:57,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493475092] [2019-11-23 22:27:57,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:27:57,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:57,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:27:57,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:57,551 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 6 states. [2019-11-23 22:27:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:57,610 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-23 22:27:57,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:57,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 22:27:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:57,612 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:27:57,612 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:27:57,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 22:27:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:27:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-23 22:27:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:27:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-23 22:27:57,619 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 27 [2019-11-23 22:27:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:57,619 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-23 22:27:57,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:27:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-23 22:27:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:27:57,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:57,620 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:27:57,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:57,833 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1175870478, now seen corresponding path program 2 times [2019-11-23 22:27:57,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:57,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886983936] [2019-11-23 22:27:57,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:27:57,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886983936] [2019-11-23 22:27:57,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570617801] [2019-11-23 22:27:57,986 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 22:27:58,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:58,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:58,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:58,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:27:58,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:58,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 22:27:58,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470775691] [2019-11-23 22:27:58,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:58,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:58,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:58,095 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2019-11-23 22:27:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,207 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2019-11-23 22:27:58,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:27:58,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-11-23 22:27:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,209 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:27:58,209 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:27:58,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 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 22:27:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:27:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-11-23 22:27:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:27:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-11-23 22:27:58,216 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 30 [2019-11-23 22:27:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,216 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-11-23 22:27:58,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-11-23 22:27:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:27:58,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,218 INFO L410 BasicCegarLoop]: trace histogram [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 22:27:58,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,422 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:58,423 INFO L82 PathProgramCache]: Analyzing trace with hash 657704709, now seen corresponding path program 3 times [2019-11-23 22:27:58,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:58,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605294647] [2019-11-23 22:27:58,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:27:59,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605294647] [2019-11-23 22:27:59,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526533432] [2019-11-23 22:27:59,174 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 22:27:59,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:27:59,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:59,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:27:59,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:59,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:27:59,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:27:59,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:28:16,678 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-23 22:28:16,680 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: SMTLIBException [2019-11-23 22:28:16,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:16,882 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:576) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 42 more [2019-11-23 22:28:16,889 INFO L168 Benchmark]: Toolchain (without parser) took 21454.07 ms. Allocated memory was 145.2 MB in the beginning and 246.4 MB in the end (delta: 101.2 MB). Free memory was 101.7 MB in the beginning and 174.1 MB in the end (delta: -72.4 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. [2019-11-23 22:28:16,890 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 145.2 MB. Free memory is still 119.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-23 22:28:16,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.38 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 90.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-11-23 22:28:16,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 133.67 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 90.8 MB in the beginning and 180.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-11-23 22:28:16,892 INFO L168 Benchmark]: Boogie Preprocessor took 30.71 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 178.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:28:16,893 INFO L168 Benchmark]: RCFGBuilder took 444.71 ms. Allocated memory is still 202.9 MB. Free memory was 178.4 MB in the beginning and 159.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2019-11-23 22:28:16,894 INFO L168 Benchmark]: TraceAbstraction took 20583.18 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 159.7 MB in the beginning and 174.1 MB in the end (delta: -14.4 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2019-11-23 22:28:16,898 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 145.2 MB. Free memory is still 119.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.38 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 90.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 133.67 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 90.8 MB in the beginning and 180.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.71 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 178.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.71 ms. Allocated memory is still 202.9 MB. Free memory was 178.4 MB in the beginning and 159.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20583.18 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 159.7 MB in the beginning and 174.1 MB in the end (delta: -14.4 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...