java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:24,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:24,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:24,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:24,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:24,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:24,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:24,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:24,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:24,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:24,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:24,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:24,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:24,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:24,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:24,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:24,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:24,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:24,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:24,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:24,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:24,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:24,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:24,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:24,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:24,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:24,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:24,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:24,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:24,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:24,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:24,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:24,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:24,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:24,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:24,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:24,383 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 [2019-10-14 21:43:24,404 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:24,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:24,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:24,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:24,406 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:24,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:24,406 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:24,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:24,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:24,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:24,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:24,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:24,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:24,408 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:24,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:24,408 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:24,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:24,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:24,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:24,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:24,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:24,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:24,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:24,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:24,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:24,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:24,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:24,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:24,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:24,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:24,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:24,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:24,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:24,706 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:24,707 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2019-10-14 21:43:24,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea94eaa0e/4835c98e4eb04399a843aa7439063af9/FLAGcbc20340e [2019-10-14 21:43:25,299 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:25,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2019-10-14 21:43:25,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea94eaa0e/4835c98e4eb04399a843aa7439063af9/FLAGcbc20340e [2019-10-14 21:43:25,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea94eaa0e/4835c98e4eb04399a843aa7439063af9 [2019-10-14 21:43:25,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:25,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:25,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:25,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:25,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:25,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:25" (1/1) ... [2019-10-14 21:43:25,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b163f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:25, skipping insertion in model container [2019-10-14 21:43:25,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:25" (1/1) ... [2019-10-14 21:43:25,735 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:25,754 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:25,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:25,966 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:25,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:26,015 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:26,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26 WrapperNode [2019-10-14 21:43:26,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:26,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:26,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:26,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:26,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (1/1) ... [2019-10-14 21:43:26,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (1/1) ... [2019-10-14 21:43:26,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (1/1) ... [2019-10-14 21:43:26,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (1/1) ... [2019-10-14 21:43:26,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (1/1) ... [2019-10-14 21:43:26,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (1/1) ... [2019-10-14 21:43:26,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (1/1) ... [2019-10-14 21:43:26,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:26,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:26,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:26,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:26,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (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 [2019-10-14 21:43:26,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:26,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:26,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:26,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:26,652 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:26,653 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-14 21:43:26,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:26 BoogieIcfgContainer [2019-10-14 21:43:26,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:26,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:26,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:26,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:26,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:25" (1/3) ... [2019-10-14 21:43:26,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318f29ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:26, skipping insertion in model container [2019-10-14 21:43:26,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:26" (2/3) ... [2019-10-14 21:43:26,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318f29ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:26, skipping insertion in model container [2019-10-14 21:43:26,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:26" (3/3) ... [2019-10-14 21:43:26,663 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2019-10-14 21:43:26,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:26,681 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:26,693 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:26,719 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:26,719 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:26,719 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:26,719 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:26,720 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:26,720 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:26,720 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:26,720 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-14 21:43:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:26,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:26,743 INFO L380 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] [2019-10-14 21:43:26,745 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash 772526198, now seen corresponding path program 1 times [2019-10-14 21:43:26,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:26,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412483968] [2019-10-14 21:43:26,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:26,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412483968] [2019-10-14 21:43:26,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:26,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:26,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62706093] [2019-10-14 21:43:26,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:26,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:27,000 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2019-10-14 21:43:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,163 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-10-14 21:43:27,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:27,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-14 21:43:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,176 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:43:27,177 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:43:27,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:43:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 21:43:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:43:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-14 21:43:27,232 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2019-10-14 21:43:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,233 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-14 21:43:27,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-14 21:43:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:27,235 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,235 INFO L380 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] [2019-10-14 21:43:27,236 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash 514335338, now seen corresponding path program 1 times [2019-10-14 21:43:27,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381424147] [2019-10-14 21:43:27,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:27,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381424147] [2019-10-14 21:43:27,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:27,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:27,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786561248] [2019-10-14 21:43:27,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:27,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:27,334 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2019-10-14 21:43:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,487 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-10-14 21:43:27,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:27,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:43:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,489 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:43:27,489 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:43:27,491 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:43:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-14 21:43:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:43:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-14 21:43:27,503 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2019-10-14 21:43:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,503 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-14 21:43:27,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-14 21:43:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:43:27,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,505 INFO L380 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] [2019-10-14 21:43:27,505 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1148318088, now seen corresponding path program 1 times [2019-10-14 21:43:27,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850151353] [2019-10-14 21:43:27,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:27,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850151353] [2019-10-14 21:43:27,626 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:27,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:27,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853782627] [2019-10-14 21:43:27,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:27,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:27,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:27,628 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2019-10-14 21:43:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,780 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-14 21:43:27,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:27,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:43:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,782 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:43:27,782 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:43:27,783 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:43:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2019-10-14 21:43:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:43:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-10-14 21:43:27,792 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2019-10-14 21:43:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,793 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-10-14 21:43:27,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-10-14 21:43:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:43:27,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,795 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:27,795 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,796 INFO L82 PathProgramCache]: Analyzing trace with hash 342802812, now seen corresponding path program 1 times [2019-10-14 21:43:27,808 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056523215] [2019-10-14 21:43:27,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:43:27,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056523215] [2019-10-14 21:43:27,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568394296] [2019-10-14 21:43:27,948 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 [2019-10-14 21:43:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:28,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:43:28,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:28,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:28,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726162188] [2019-10-14 21:43:28,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:28,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:28,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:28,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:28,083 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2019-10-14 21:43:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:28,194 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2019-10-14 21:43:28,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:28,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-10-14 21:43:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:28,195 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:43:28,196 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:43:28,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:43:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-14 21:43:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:43:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-14 21:43:28,204 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 39 [2019-10-14 21:43:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:28,204 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-14 21:43:28,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-14 21:43:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:43:28,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:28,206 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:28,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:28,410 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -652688358, now seen corresponding path program 2 times [2019-10-14 21:43:28,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:28,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509747469] [2019-10-14 21:43:28,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:28,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509747469] [2019-10-14 21:43:28,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559928359] [2019-10-14 21:43:28,529 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 [2019-10-14 21:43:28,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:28,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:28,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:28,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:28,659 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:28,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:28,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011530304] [2019-10-14 21:43:28,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:28,660 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:28,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:28,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:28,661 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2019-10-14 21:43:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:28,829 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2019-10-14 21:43:28,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:28,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-10-14 21:43:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:28,830 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:43:28,831 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:43:28,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:43:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-10-14 21:43:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:43:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-10-14 21:43:28,844 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 41 [2019-10-14 21:43:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:28,845 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-10-14 21:43:28,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-10-14 21:43:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:43:28,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:28,848 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:29,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,056 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,056 INFO L82 PathProgramCache]: Analyzing trace with hash -291170034, now seen corresponding path program 3 times [2019-10-14 21:43:29,057 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056204710] [2019-10-14 21:43:29,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:43:29,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056204710] [2019-10-14 21:43:29,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813690250] [2019-10-14 21:43:29,183 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 [2019-10-14 21:43:29,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:29,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:29,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:29,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:43:29,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:29,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:43:29,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473015877] [2019-10-14 21:43:29,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:43:29,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:43:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:29,316 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 7 states. [2019-10-14 21:43:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:29,548 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2019-10-14 21:43:29,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:43:29,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2019-10-14 21:43:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:29,550 INFO L225 Difference]: With dead ends: 117 [2019-10-14 21:43:29,550 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:43:29,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:43:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2019-10-14 21:43:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:43:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2019-10-14 21:43:29,567 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 53 [2019-10-14 21:43:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:29,570 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2019-10-14 21:43:29,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:43:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2019-10-14 21:43:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:43:29,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:29,572 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 21:43:29,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,778 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1440378882, now seen corresponding path program 4 times [2019-10-14 21:43:29,778 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852569049] [2019-10-14 21:43:29,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:43:29,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852569049] [2019-10-14 21:43:29,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314358993] [2019-10-14 21:43:29,919 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,997 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:29,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:29,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:30,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 21:43:30,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:30,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:43:30,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539743563] [2019-10-14 21:43:30,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:43:30,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:30,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:43:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:30,056 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 10 states. [2019-10-14 21:43:30,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:30,304 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2019-10-14 21:43:30,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:30,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2019-10-14 21:43:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:30,305 INFO L225 Difference]: With dead ends: 150 [2019-10-14 21:43:30,305 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:43:30,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:43:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2019-10-14 21:43:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:43:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2019-10-14 21:43:30,314 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 65 [2019-10-14 21:43:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:30,314 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2019-10-14 21:43:30,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:43:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2019-10-14 21:43:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:43:30,316 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:30,316 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2019-10-14 21:43:30,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:30,521 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash -434445036, now seen corresponding path program 5 times [2019-10-14 21:43:30,522 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:30,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534205757] [2019-10-14 21:43:30,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:43:30,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534205757] [2019-10-14 21:43:30,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000283913] [2019-10-14 21:43:30,650 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true