/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/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:37:14,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:37:14,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:37:14,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:37:14,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:37:14,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:37:14,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:37:14,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:37:14,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:37:14,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:37:14,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:37:14,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:37:14,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:37:14,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:37:14,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:37:14,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:37:14,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:37:14,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:37:14,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:37:14,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:37:14,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:37:14,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:37:14,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:37:14,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:37:14,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:37:14,377 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 20:37:14,412 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:37:14,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:37:14,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:37:14,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:37:14,414 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:37:14,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:37:14,416 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:37:14,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:37:14,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:37:14,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:37:14,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:37:14,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:37:14,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:37:14,418 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:37:14,418 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:37:14,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:37:14,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:37:14,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:37:14,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:37:14,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:37:14,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:37:14,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:37:14,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:37:14,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:37:14,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:37:14,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:37:14,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:37:14,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:37:14,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:37:14,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:37:14,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:37:14,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:37:14,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:37:14,708 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:37:14,708 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:37:14,709 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-23 20:37:14,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910129038/f9328955d2554c779065aded69fd7c72/FLAG8da9d6890 [2019-11-23 20:37:15,269 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:37:15,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-23 20:37:15,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910129038/f9328955d2554c779065aded69fd7c72/FLAG8da9d6890 [2019-11-23 20:37:15,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910129038/f9328955d2554c779065aded69fd7c72 [2019-11-23 20:37:15,599 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:37:15,601 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:37:15,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:15,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:37:15,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:37:15,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:15,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b4ea73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15, skipping insertion in model container [2019-11-23 20:37:15,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:15,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:37:15,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:37:15,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:15,922 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:37:15,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:15,971 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:37:15,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15 WrapperNode [2019-11-23 20:37:15,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:15,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:15,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:37:15,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:37:15,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:15,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:16,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:37:16,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:37:16,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:37:16,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (1/1) ... [2019-11-23 20:37:16,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:37:16,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:37:16,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:37:16,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:37:16,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (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 20:37:16,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:37:16,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:37:16,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:37:16,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:37:16,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:37:16,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:37:16,444 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:37:16,444 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:37:16,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:16 BoogieIcfgContainer [2019-11-23 20:37:16,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:37:16,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:37:16,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:37:16,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:37:16,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:15" (1/3) ... [2019-11-23 20:37:16,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b36661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:16, skipping insertion in model container [2019-11-23 20:37:16,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:15" (2/3) ... [2019-11-23 20:37:16,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b36661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:16, skipping insertion in model container [2019-11-23 20:37:16,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:16" (3/3) ... [2019-11-23 20:37:16,476 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2019-11-23 20:37:16,498 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:37:16,506 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:37:16,520 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:37:16,547 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:37:16,547 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:37:16,547 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:37:16,547 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:37:16,551 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:37:16,551 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:37:16,551 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:37:16,551 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:37:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 20:37:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 20:37:16,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:16,585 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:16,585 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:16,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2019-11-23 20:37:16,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:16,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895334621] [2019-11-23 20:37:16,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:16,740 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 20:37:16,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895334621] [2019-11-23 20:37:16,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:37:16,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:37:16,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620872979] [2019-11-23 20:37:16,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:37:16,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:37:16,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:37:16,761 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-11-23 20:37:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:16,842 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-11-23 20:37:16,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:37:16,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 20:37:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:16,853 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:37:16,854 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:37:16,857 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 20:37:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:37:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2019-11-23 20:37:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:37:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:37:16,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2019-11-23 20:37:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:16,891 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:37:16,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:37:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:37:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:37:16,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:16,892 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:16,893 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2019-11-23 20:37:16,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:16,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990435698] [2019-11-23 20:37:16,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:16,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990435698] [2019-11-23 20:37:16,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943094341] [2019-11-23 20:37:16,945 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 20:37:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:16,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:37:16,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:17,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:17,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:37:17,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57841025] [2019-11-23 20:37:17,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:37:17,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:17,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:37:17,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:37:17,027 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-23 20:37:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:17,098 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-11-23 20:37:17,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:37:17,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-23 20:37:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:17,101 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:37:17,102 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:37:17,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:37:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:37:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-23 20:37:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:37:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:37:17,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2019-11-23 20:37:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:17,110 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:37:17,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:37:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:37:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:37:17,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:17,112 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:17,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:17,325 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2019-11-23 20:37:17,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:17,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721512188] [2019-11-23 20:37:17,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:17,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721512188] [2019-11-23 20:37:17,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242196988] [2019-11-23 20:37:17,401 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 20:37:17,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:17,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:17,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:37:17,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:17,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:17,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:37:17,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161649050] [2019-11-23 20:37:17,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:37:17,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:17,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:37:17,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:17,465 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2019-11-23 20:37:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:17,547 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2019-11-23 20:37:17,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:37:17,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:37:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:17,550 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:37:17,550 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:37:17,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:37:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-11-23 20:37:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:37:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-23 20:37:17,565 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2019-11-23 20:37:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:17,565 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-23 20:37:17,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:37:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-23 20:37:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:37:17,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:17,567 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:17,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:17,770 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:17,770 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2019-11-23 20:37:17,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:17,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367535518] [2019-11-23 20:37:17,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:17,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367535518] [2019-11-23 20:37:17,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096285612] [2019-11-23 20:37:17,852 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 20:37:17,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:37:17,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:17,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:37:17,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:17,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:17,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:37:17,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362046037] [2019-11-23 20:37:17,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:37:17,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:17,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:37:17,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:17,911 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2019-11-23 20:37:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:18,002 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2019-11-23 20:37:18,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:37:18,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-23 20:37:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:18,004 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:37:18,004 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:37:18,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:37:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-11-23 20:37:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:37:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-11-23 20:37:18,012 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2019-11-23 20:37:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:18,013 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-11-23 20:37:18,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:37:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-11-23 20:37:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:37:18,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:18,014 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:18,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:18,225 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:18,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2019-11-23 20:37:18,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:18,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634135767] [2019-11-23 20:37:18,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:18,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634135767] [2019-11-23 20:37:18,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064570564] [2019-11-23 20:37:18,331 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 [2019-11-23 20:37:18,372 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:18,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:18,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:37:18,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:18,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:18,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:37:18,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134733085] [2019-11-23 20:37:18,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:37:18,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:18,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:37:18,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:37:18,388 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2019-11-23 20:37:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:18,482 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2019-11-23 20:37:18,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:37:18,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-23 20:37:18,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:18,484 INFO L225 Difference]: With dead ends: 84 [2019-11-23 20:37:18,484 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:37:18,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:37:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:37:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2019-11-23 20:37:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:37:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-11-23 20:37:18,492 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 15 [2019-11-23 20:37:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:18,492 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-11-23 20:37:18,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:37:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-11-23 20:37:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:37:18,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:18,493 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:18,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:18,701 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2019-11-23 20:37:18,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:18,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216889278] [2019-11-23 20:37:18,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:18,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216889278] [2019-11-23 20:37:18,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542464932] [2019-11-23 20:37:18,799 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 [2019-11-23 20:37:18,855 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:37:18,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:18,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:37:18,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:18,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:18,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:37:18,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959647480] [2019-11-23 20:37:18,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:37:18,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:18,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:37:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:18,893 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 9 states. [2019-11-23 20:37:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:18,996 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2019-11-23 20:37:18,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:37:18,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-23 20:37:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:18,997 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:37:18,997 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:37:18,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:37:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2019-11-23 20:37:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:37:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2019-11-23 20:37:19,016 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 17 [2019-11-23 20:37:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:19,016 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2019-11-23 20:37:19,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:37:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2019-11-23 20:37:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:37:19,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:19,018 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:19,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:19,223 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2019-11-23 20:37:19,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:19,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105364544] [2019-11-23 20:37:19,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:19,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105364544] [2019-11-23 20:37:19,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224294998] [2019-11-23 20:37:19,343 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:19,380 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:37:19,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:19,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:37:19,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:19,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:19,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:37:19,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811102224] [2019-11-23 20:37:19,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:37:19,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:37:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:19,398 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2019-11-23 20:37:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:19,500 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2019-11-23 20:37:19,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:37:19,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-23 20:37:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:19,501 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:37:19,502 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:37:19,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:37:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2019-11-23 20:37:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:37:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-11-23 20:37:19,520 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 19 [2019-11-23 20:37:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:19,520 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-11-23 20:37:19,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:37:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-11-23 20:37:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:37:19,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:19,522 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:19,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:19,723 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:19,723 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2019-11-23 20:37:19,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:19,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415848134] [2019-11-23 20:37:19,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:19,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415848134] [2019-11-23 20:37:19,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676585379] [2019-11-23 20:37:19,821 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:19,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:37:19,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:19,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:19,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:37:19,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731607561] [2019-11-23 20:37:19,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:37:19,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:19,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:37:19,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:37:19,892 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2019-11-23 20:37:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:20,021 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2019-11-23 20:37:20,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:37:20,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-23 20:37:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:20,023 INFO L225 Difference]: With dead ends: 126 [2019-11-23 20:37:20,023 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:37:20,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:37:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:37:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2019-11-23 20:37:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:37:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-11-23 20:37:20,041 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 21 [2019-11-23 20:37:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:20,041 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-11-23 20:37:20,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:37:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-11-23 20:37:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:37:20,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:20,042 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:20,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:20,248 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2019-11-23 20:37:20,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:20,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416975467] [2019-11-23 20:37:20,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:20,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416975467] [2019-11-23 20:37:20,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523379864] [2019-11-23 20:37:20,389 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:20,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:20,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:20,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:37:20,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:20,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:20,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:37:20,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027368477] [2019-11-23 20:37:20,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:37:20,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:20,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:37:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:37:20,455 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2019-11-23 20:37:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:20,553 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2019-11-23 20:37:20,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:37:20,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-23 20:37:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:20,554 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:37:20,554 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:37:20,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:37:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:37:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2019-11-23 20:37:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:37:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2019-11-23 20:37:20,572 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 23 [2019-11-23 20:37:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:20,572 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2019-11-23 20:37:20,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:37:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2019-11-23 20:37:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:37:20,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:20,576 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:20,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:20,777 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2019-11-23 20:37:20,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:20,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826384915] [2019-11-23 20:37:20,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:20,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826384915] [2019-11-23 20:37:20,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100538998] [2019-11-23 20:37:20,930 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:20,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:37:20,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:20,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:37:20,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:20,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:20,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:37:20,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618791653] [2019-11-23 20:37:20,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:37:20,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:21,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:37:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:21,002 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 13 states. [2019-11-23 20:37:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:21,114 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2019-11-23 20:37:21,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:37:21,115 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2019-11-23 20:37:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:21,116 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:37:21,116 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:37:21,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:37:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2019-11-23 20:37:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:37:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2019-11-23 20:37:21,123 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2019-11-23 20:37:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:21,124 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2019-11-23 20:37:21,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:37:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2019-11-23 20:37:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:37:21,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:21,125 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:21,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:21,326 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2019-11-23 20:37:21,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:21,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864684952] [2019-11-23 20:37:21,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:21,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864684952] [2019-11-23 20:37:21,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060087569] [2019-11-23 20:37:21,440 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:21,476 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:21,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:21,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:37:21,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:21,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:21,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:37:21,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772715134] [2019-11-23 20:37:21,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:37:21,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:21,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:37:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:37:21,497 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 14 states. [2019-11-23 20:37:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:21,633 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2019-11-23 20:37:21,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:37:21,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-23 20:37:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:21,636 INFO L225 Difference]: With dead ends: 168 [2019-11-23 20:37:21,636 INFO L226 Difference]: Without dead ends: 111 [2019-11-23 20:37:21,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:37:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-23 20:37:21,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2019-11-23 20:37:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:37:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2019-11-23 20:37:21,644 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2019-11-23 20:37:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:21,644 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2019-11-23 20:37:21,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:37:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2019-11-23 20:37:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:37:21,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:21,645 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:21,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:21,850 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2019-11-23 20:37:21,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:21,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743639951] [2019-11-23 20:37:21,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:21,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743639951] [2019-11-23 20:37:21,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238815798] [2019-11-23 20:37:21,999 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:22,069 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:37:22,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:22,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:37:22,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:22,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:22,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:37:22,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762022811] [2019-11-23 20:37:22,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:37:22,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:37:22,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:37:22,087 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 15 states. [2019-11-23 20:37:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:22,217 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2019-11-23 20:37:22,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:37:22,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2019-11-23 20:37:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:22,218 INFO L225 Difference]: With dead ends: 182 [2019-11-23 20:37:22,218 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:37:22,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:37:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:37:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2019-11-23 20:37:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:37:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2019-11-23 20:37:22,232 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 29 [2019-11-23 20:37:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:22,232 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2019-11-23 20:37:22,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:37:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2019-11-23 20:37:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:37:22,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:22,237 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:22,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:22,442 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:22,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:22,442 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2019-11-23 20:37:22,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:22,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646268279] [2019-11-23 20:37:22,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:22,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646268279] [2019-11-23 20:37:22,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238404171] [2019-11-23 20:37:22,583 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:22,704 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:37:22,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:22,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:37:22,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:22,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:22,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:37:22,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817769800] [2019-11-23 20:37:22,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:37:22,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:37:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:37:22,724 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 16 states. [2019-11-23 20:37:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:22,865 INFO L93 Difference]: Finished difference Result 196 states and 213 transitions. [2019-11-23 20:37:22,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:37:22,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2019-11-23 20:37:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:22,867 INFO L225 Difference]: With dead ends: 196 [2019-11-23 20:37:22,867 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 20:37:22,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:37:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 20:37:22,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2019-11-23 20:37:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:37:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2019-11-23 20:37:22,884 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 31 [2019-11-23 20:37:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:22,884 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2019-11-23 20:37:22,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:37:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2019-11-23 20:37:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:37:22,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:22,885 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:23,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:23,090 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2019-11-23 20:37:23,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:23,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167236043] [2019-11-23 20:37:23,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:23,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167236043] [2019-11-23 20:37:23,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175303046] [2019-11-23 20:37:23,240 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:23,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:37:23,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:23,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:23,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:37:23,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827940485] [2019-11-23 20:37:23,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:37:23,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:23,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:37:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:37:23,322 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 17 states. [2019-11-23 20:37:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:23,467 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2019-11-23 20:37:23,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:37:23,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2019-11-23 20:37:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:23,469 INFO L225 Difference]: With dead ends: 210 [2019-11-23 20:37:23,469 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:37:23,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:37:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:37:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2019-11-23 20:37:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:37:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2019-11-23 20:37:23,483 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 33 [2019-11-23 20:37:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:23,485 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2019-11-23 20:37:23,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:37:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2019-11-23 20:37:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:37:23,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:23,486 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:23,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:23,687 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2019-11-23 20:37:23,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:23,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066442921] [2019-11-23 20:37:23,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:23,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066442921] [2019-11-23 20:37:23,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316628088] [2019-11-23 20:37:23,836 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:23,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:23,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:23,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:37:23,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:23,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:23,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:37:23,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988774861] [2019-11-23 20:37:23,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:37:23,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:37:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:37:23,889 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 18 states. [2019-11-23 20:37:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:24,027 INFO L93 Difference]: Finished difference Result 224 states and 243 transitions. [2019-11-23 20:37:24,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:37:24,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2019-11-23 20:37:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:24,029 INFO L225 Difference]: With dead ends: 224 [2019-11-23 20:37:24,029 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:37:24,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:37:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:37:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2019-11-23 20:37:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:37:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2019-11-23 20:37:24,034 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 35 [2019-11-23 20:37:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:24,035 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2019-11-23 20:37:24,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:37:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2019-11-23 20:37:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:37:24,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:24,036 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:24,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:24,239 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:24,240 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2019-11-23 20:37:24,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:24,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852969857] [2019-11-23 20:37:24,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:24,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852969857] [2019-11-23 20:37:24,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086742780] [2019-11-23 20:37:24,460 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:24,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:37:24,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:24,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:37:24,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:24,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:24,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:37:24,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049360885] [2019-11-23 20:37:24,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:37:24,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:24,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:37:24,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:37:24,558 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand 19 states. [2019-11-23 20:37:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:24,726 INFO L93 Difference]: Finished difference Result 238 states and 258 transitions. [2019-11-23 20:37:24,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:37:24,726 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2019-11-23 20:37:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:24,727 INFO L225 Difference]: With dead ends: 238 [2019-11-23 20:37:24,728 INFO L226 Difference]: Without dead ends: 156 [2019-11-23 20:37:24,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:37:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-23 20:37:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2019-11-23 20:37:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 20:37:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2019-11-23 20:37:24,733 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 37 [2019-11-23 20:37:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:24,733 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2019-11-23 20:37:24,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:37:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2019-11-23 20:37:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:37:24,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:24,734 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:24,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:24,938 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2019-11-23 20:37:24,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:24,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515753250] [2019-11-23 20:37:24,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:25,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515753250] [2019-11-23 20:37:25,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163015028] [2019-11-23 20:37:25,139 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:25,173 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:25,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:25,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:37:25,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:25,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:25,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:37:25,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029469589] [2019-11-23 20:37:25,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:37:25,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:37:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:37:25,200 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand 20 states. [2019-11-23 20:37:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:25,362 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2019-11-23 20:37:25,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:37:25,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2019-11-23 20:37:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:25,364 INFO L225 Difference]: With dead ends: 252 [2019-11-23 20:37:25,365 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:37:25,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:37:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:37:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 129. [2019-11-23 20:37:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:37:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2019-11-23 20:37:25,371 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 39 [2019-11-23 20:37:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:25,372 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2019-11-23 20:37:25,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:37:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2019-11-23 20:37:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:37:25,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:25,373 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:25,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:25,576 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2019-11-23 20:37:25,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:25,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694404124] [2019-11-23 20:37:25,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:25,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694404124] [2019-11-23 20:37:25,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91922003] [2019-11-23 20:37:25,775 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:26,031 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:37:26,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:26,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:37:26,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:26,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:26,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:37:26,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581225981] [2019-11-23 20:37:26,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:37:26,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:26,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:37:26,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:26,098 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 21 states. [2019-11-23 20:37:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:26,347 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2019-11-23 20:37:26,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:37:26,348 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2019-11-23 20:37:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:26,350 INFO L225 Difference]: With dead ends: 266 [2019-11-23 20:37:26,350 INFO L226 Difference]: Without dead ends: 174 [2019-11-23 20:37:26,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-23 20:37:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2019-11-23 20:37:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:37:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2019-11-23 20:37:26,358 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 41 [2019-11-23 20:37:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:26,359 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2019-11-23 20:37:26,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:37:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2019-11-23 20:37:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:37:26,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:26,368 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:26,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:26,574 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2019-11-23 20:37:26,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:26,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821981379] [2019-11-23 20:37:26,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:26,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821981379] [2019-11-23 20:37:26,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006689186] [2019-11-23 20:37:26,784 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:26,941 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:37:26,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:26,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:37:26,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:26,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:26,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:37:26,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97197923] [2019-11-23 20:37:26,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:37:26,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:37:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:37:26,964 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand 22 states. [2019-11-23 20:37:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:27,178 INFO L93 Difference]: Finished difference Result 280 states and 303 transitions. [2019-11-23 20:37:27,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:37:27,179 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2019-11-23 20:37:27,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:27,180 INFO L225 Difference]: With dead ends: 280 [2019-11-23 20:37:27,181 INFO L226 Difference]: Without dead ends: 183 [2019-11-23 20:37:27,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:37:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-23 20:37:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 143. [2019-11-23 20:37:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 20:37:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2019-11-23 20:37:27,187 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 43 [2019-11-23 20:37:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:27,188 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2019-11-23 20:37:27,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:37:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2019-11-23 20:37:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:37:27,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:27,189 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:27,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:27,393 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2019-11-23 20:37:27,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:27,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675464820] [2019-11-23 20:37:27,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:27,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675464820] [2019-11-23 20:37:27,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707793890] [2019-11-23 20:37:27,641 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:27,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:37:27,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:27,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:27,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:37:27,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819694742] [2019-11-23 20:37:27,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:37:27,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:37:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:37:27,713 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand 23 states. [2019-11-23 20:37:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:27,895 INFO L93 Difference]: Finished difference Result 294 states and 318 transitions. [2019-11-23 20:37:27,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:37:27,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2019-11-23 20:37:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:27,897 INFO L225 Difference]: With dead ends: 294 [2019-11-23 20:37:27,897 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:37:27,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:37:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:37:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2019-11-23 20:37:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 20:37:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2019-11-23 20:37:27,903 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 45 [2019-11-23 20:37:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:27,903 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2019-11-23 20:37:27,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:37:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2019-11-23 20:37:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:37:27,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:27,904 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:28,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:28,108 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2019-11-23 20:37:28,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:28,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601083748] [2019-11-23 20:37:28,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:28,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601083748] [2019-11-23 20:37:28,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119685226] [2019-11-23 20:37:28,380 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:28,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:28,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:28,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:37:28,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:28,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:28,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:37:28,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462015610] [2019-11-23 20:37:28,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:37:28,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:28,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:37:28,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:37:28,450 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand 24 states. [2019-11-23 20:37:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:28,660 INFO L93 Difference]: Finished difference Result 308 states and 333 transitions. [2019-11-23 20:37:28,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:37:28,660 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2019-11-23 20:37:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:28,662 INFO L225 Difference]: With dead ends: 308 [2019-11-23 20:37:28,662 INFO L226 Difference]: Without dead ends: 201 [2019-11-23 20:37:28,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:37:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-23 20:37:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 157. [2019-11-23 20:37:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-23 20:37:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2019-11-23 20:37:28,669 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 47 [2019-11-23 20:37:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:28,669 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2019-11-23 20:37:28,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:37:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2019-11-23 20:37:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:37:28,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:28,670 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:28,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:28,873 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:28,874 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2019-11-23 20:37:28,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:28,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237854806] [2019-11-23 20:37:28,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:29,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237854806] [2019-11-23 20:37:29,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220253587] [2019-11-23 20:37:29,173 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:29,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 20:37:29,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:29,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:37:29,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:29,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:29,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:37:29,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540182369] [2019-11-23 20:37:29,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:37:29,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:37:29,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:37:29,338 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 25 states. [2019-11-23 20:37:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:29,545 INFO L93 Difference]: Finished difference Result 322 states and 348 transitions. [2019-11-23 20:37:29,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:37:29,548 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2019-11-23 20:37:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:29,549 INFO L225 Difference]: With dead ends: 322 [2019-11-23 20:37:29,549 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 20:37:29,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:37:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 20:37:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 164. [2019-11-23 20:37:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:37:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2019-11-23 20:37:29,555 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 49 [2019-11-23 20:37:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:29,555 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2019-11-23 20:37:29,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:37:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2019-11-23 20:37:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:37:29,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:29,556 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:29,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:29,760 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:29,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:29,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2019-11-23 20:37:29,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:29,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534328847] [2019-11-23 20:37:29,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:30,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534328847] [2019-11-23 20:37:30,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128498817] [2019-11-23 20:37:30,042 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:30,080 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:30,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:30,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:37:30,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:30,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:30,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:37:30,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262043211] [2019-11-23 20:37:30,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:37:30,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:37:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:37:30,105 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand 26 states. [2019-11-23 20:37:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:30,322 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2019-11-23 20:37:30,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:37:30,322 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2019-11-23 20:37:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:30,324 INFO L225 Difference]: With dead ends: 336 [2019-11-23 20:37:30,324 INFO L226 Difference]: Without dead ends: 219 [2019-11-23 20:37:30,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:37:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-11-23 20:37:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2019-11-23 20:37:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-23 20:37:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2019-11-23 20:37:30,331 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 51 [2019-11-23 20:37:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:30,331 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2019-11-23 20:37:30,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:37:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2019-11-23 20:37:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:37:30,332 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:30,332 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:30,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:30,536 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2019-11-23 20:37:30,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:30,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34233949] [2019-11-23 20:37:30,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:30,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34233949] [2019-11-23 20:37:30,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833532868] [2019-11-23 20:37:30,855 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:31,187 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:37:31,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:31,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:37:31,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:31,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:31,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:37:31,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743685490] [2019-11-23 20:37:31,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:37:31,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:37:31,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:37:31,212 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 27 states. [2019-11-23 20:37:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:31,435 INFO L93 Difference]: Finished difference Result 350 states and 378 transitions. [2019-11-23 20:37:31,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:37:31,435 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2019-11-23 20:37:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:31,436 INFO L225 Difference]: With dead ends: 350 [2019-11-23 20:37:31,436 INFO L226 Difference]: Without dead ends: 228 [2019-11-23 20:37:31,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:37:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-11-23 20:37:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2019-11-23 20:37:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 20:37:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2019-11-23 20:37:31,442 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 53 [2019-11-23 20:37:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:31,443 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2019-11-23 20:37:31,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:37:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2019-11-23 20:37:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:37:31,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:31,444 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:31,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:31,649 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2019-11-23 20:37:31,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:31,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340642692] [2019-11-23 20:37:31,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:32,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340642692] [2019-11-23 20:37:32,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681984391] [2019-11-23 20:37:32,009 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:33,823 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:37:33,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:33,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:37:33,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:33,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:33,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:37:33,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618197523] [2019-11-23 20:37:33,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:37:33,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:33,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:37:33,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:37:33,846 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand 28 states. [2019-11-23 20:37:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:34,088 INFO L93 Difference]: Finished difference Result 364 states and 393 transitions. [2019-11-23 20:37:34,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:37:34,089 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2019-11-23 20:37:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:34,090 INFO L225 Difference]: With dead ends: 364 [2019-11-23 20:37:34,090 INFO L226 Difference]: Without dead ends: 237 [2019-11-23 20:37:34,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:37:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-23 20:37:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 185. [2019-11-23 20:37:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-23 20:37:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2019-11-23 20:37:34,097 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 55 [2019-11-23 20:37:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:34,097 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2019-11-23 20:37:34,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:37:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2019-11-23 20:37:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:37:34,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:34,098 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:34,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:34,303 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:34,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1300597277, now seen corresponding path program 25 times [2019-11-23 20:37:34,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:34,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912008201] [2019-11-23 20:37:34,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:34,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912008201] [2019-11-23 20:37:34,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75408979] [2019-11-23 20:37:34,706 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:34,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:37:34,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:34,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:34,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:37:34,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344214319] [2019-11-23 20:37:34,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:37:34,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:34,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:37:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:37:34,788 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand 29 states. [2019-11-23 20:37:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:35,064 INFO L93 Difference]: Finished difference Result 378 states and 408 transitions. [2019-11-23 20:37:35,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:37:35,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2019-11-23 20:37:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:35,066 INFO L225 Difference]: With dead ends: 378 [2019-11-23 20:37:35,066 INFO L226 Difference]: Without dead ends: 246 [2019-11-23 20:37:35,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:37:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-11-23 20:37:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 192. [2019-11-23 20:37:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:37:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 220 transitions. [2019-11-23 20:37:35,073 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 220 transitions. Word has length 57 [2019-11-23 20:37:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:35,073 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 220 transitions. [2019-11-23 20:37:35,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:37:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 220 transitions. [2019-11-23 20:37:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:37:35,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:35,074 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:35,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:35,277 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882843, now seen corresponding path program 26 times [2019-11-23 20:37:35,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:35,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625315875] [2019-11-23 20:37:35,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:35,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625315875] [2019-11-23 20:37:35,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003120359] [2019-11-23 20:37:35,691 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:35,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:35,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:35,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:37:35,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:35,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:35,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:37:35,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32404480] [2019-11-23 20:37:35,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:37:35,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:35,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:37:35,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:37:35,776 INFO L87 Difference]: Start difference. First operand 192 states and 220 transitions. Second operand 30 states. [2019-11-23 20:37:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:36,042 INFO L93 Difference]: Finished difference Result 392 states and 423 transitions. [2019-11-23 20:37:36,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:37:36,042 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2019-11-23 20:37:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:36,044 INFO L225 Difference]: With dead ends: 392 [2019-11-23 20:37:36,044 INFO L226 Difference]: Without dead ends: 255 [2019-11-23 20:37:36,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:37:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-11-23 20:37:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 199. [2019-11-23 20:37:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-23 20:37:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 228 transitions. [2019-11-23 20:37:36,050 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 228 transitions. Word has length 59 [2019-11-23 20:37:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:36,051 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 228 transitions. [2019-11-23 20:37:36,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:37:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 228 transitions. [2019-11-23 20:37:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:37:36,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:36,052 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:36,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:36,255 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 654124313, now seen corresponding path program 27 times [2019-11-23 20:37:36,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:36,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199398769] [2019-11-23 20:37:36,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:36,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199398769] [2019-11-23 20:37:36,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062408010] [2019-11-23 20:37:36,753 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:37,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 20:37:37,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:37,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:37:37,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:37,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:37,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:37:37,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705960062] [2019-11-23 20:37:37,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:37:37,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:37:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:37:37,327 INFO L87 Difference]: Start difference. First operand 199 states and 228 transitions. Second operand 31 states. [2019-11-23 20:37:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:37,650 INFO L93 Difference]: Finished difference Result 406 states and 438 transitions. [2019-11-23 20:37:37,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:37:37,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2019-11-23 20:37:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:37,653 INFO L225 Difference]: With dead ends: 406 [2019-11-23 20:37:37,653 INFO L226 Difference]: Without dead ends: 264 [2019-11-23 20:37:37,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:37:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-11-23 20:37:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 206. [2019-11-23 20:37:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-23 20:37:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2019-11-23 20:37:37,659 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 61 [2019-11-23 20:37:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:37,660 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2019-11-23 20:37:37,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:37:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2019-11-23 20:37:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:37:37,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:37,661 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:37,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:37,865 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1101344937, now seen corresponding path program 28 times [2019-11-23 20:37:37,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:37,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465976416] [2019-11-23 20:37:37,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:38,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465976416] [2019-11-23 20:37:38,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058559182] [2019-11-23 20:37:38,222 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:38,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:38,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:38,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:37:38,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:38,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:38,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:37:38,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799298286] [2019-11-23 20:37:38,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:37:38,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:37:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:37:38,283 INFO L87 Difference]: Start difference. First operand 206 states and 236 transitions. Second operand 32 states. [2019-11-23 20:37:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:38,649 INFO L93 Difference]: Finished difference Result 420 states and 453 transitions. [2019-11-23 20:37:38,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:37:38,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2019-11-23 20:37:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:38,651 INFO L225 Difference]: With dead ends: 420 [2019-11-23 20:37:38,651 INFO L226 Difference]: Without dead ends: 273 [2019-11-23 20:37:38,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:37:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-11-23 20:37:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 213. [2019-11-23 20:37:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-23 20:37:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2019-11-23 20:37:38,659 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 63 [2019-11-23 20:37:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:38,659 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2019-11-23 20:37:38,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:37:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2019-11-23 20:37:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:37:38,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:38,660 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:38,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:38,863 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:38,864 INFO L82 PathProgramCache]: Analyzing trace with hash -185146859, now seen corresponding path program 29 times [2019-11-23 20:37:38,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:38,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101666650] [2019-11-23 20:37:38,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:39,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101666650] [2019-11-23 20:37:39,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198721478] [2019-11-23 20:37:39,287 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:40,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:37:40,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:40,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:37:40,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:40,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:40,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:37:40,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481969760] [2019-11-23 20:37:40,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:37:40,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:37:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:37:40,185 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand 33 states. [2019-11-23 20:37:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:40,488 INFO L93 Difference]: Finished difference Result 434 states and 468 transitions. [2019-11-23 20:37:40,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:37:40,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2019-11-23 20:37:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:40,490 INFO L225 Difference]: With dead ends: 434 [2019-11-23 20:37:40,490 INFO L226 Difference]: Without dead ends: 282 [2019-11-23 20:37:40,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:37:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-11-23 20:37:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2019-11-23 20:37:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-11-23 20:37:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 252 transitions. [2019-11-23 20:37:40,496 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 252 transitions. Word has length 65 [2019-11-23 20:37:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:40,497 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 252 transitions. [2019-11-23 20:37:40,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:37:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 252 transitions. [2019-11-23 20:37:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:37:40,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:40,497 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:40,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:40,703 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash -187089581, now seen corresponding path program 30 times [2019-11-23 20:37:40,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:40,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854824634] [2019-11-23 20:37:40,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:41,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854824634] [2019-11-23 20:37:41,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085181735] [2019-11-23 20:37:41,145 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:48,196 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 20:37:48,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:48,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:37:48,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:48,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:48,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:37:48,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060353206] [2019-11-23 20:37:48,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:37:48,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:37:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:37:48,225 INFO L87 Difference]: Start difference. First operand 220 states and 252 transitions. Second operand 34 states. [2019-11-23 20:37:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:48,579 INFO L93 Difference]: Finished difference Result 448 states and 483 transitions. [2019-11-23 20:37:48,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:37:48,579 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2019-11-23 20:37:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:48,581 INFO L225 Difference]: With dead ends: 448 [2019-11-23 20:37:48,581 INFO L226 Difference]: Without dead ends: 291 [2019-11-23 20:37:48,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:37:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-11-23 20:37:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 227. [2019-11-23 20:37:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-11-23 20:37:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 260 transitions. [2019-11-23 20:37:48,587 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 260 transitions. Word has length 67 [2019-11-23 20:37:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:48,588 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 260 transitions. [2019-11-23 20:37:48,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:37:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 260 transitions. [2019-11-23 20:37:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:37:48,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:48,589 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:48,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:48,796 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2054045423, now seen corresponding path program 31 times [2019-11-23 20:37:48,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:48,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396321506] [2019-11-23 20:37:48,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:49,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396321506] [2019-11-23 20:37:49,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446564853] [2019-11-23 20:37:49,242 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:49,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:37:49,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:49,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:49,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:37:49,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545496076] [2019-11-23 20:37:49,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:37:49,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:49,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:37:49,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:37:49,307 INFO L87 Difference]: Start difference. First operand 227 states and 260 transitions. Second operand 35 states. [2019-11-23 20:37:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:49,628 INFO L93 Difference]: Finished difference Result 462 states and 498 transitions. [2019-11-23 20:37:49,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:37:49,628 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2019-11-23 20:37:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:49,630 INFO L225 Difference]: With dead ends: 462 [2019-11-23 20:37:49,630 INFO L226 Difference]: Without dead ends: 300 [2019-11-23 20:37:49,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:37:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-11-23 20:37:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 234. [2019-11-23 20:37:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-11-23 20:37:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 268 transitions. [2019-11-23 20:37:49,637 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 268 transitions. Word has length 69 [2019-11-23 20:37:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:49,638 INFO L462 AbstractCegarLoop]: Abstraction has 234 states and 268 transitions. [2019-11-23 20:37:49,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:37:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 268 transitions. [2019-11-23 20:37:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:37:49,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:49,639 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:49,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:49,842 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:49,843 INFO L82 PathProgramCache]: Analyzing trace with hash -902279857, now seen corresponding path program 32 times [2019-11-23 20:37:49,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:49,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692434643] [2019-11-23 20:37:49,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:50,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692434643] [2019-11-23 20:37:50,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423499842] [2019-11-23 20:37:50,304 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:50,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:50,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:50,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:37:50,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:50,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:50,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:37:50,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036986105] [2019-11-23 20:37:50,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:37:50,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:37:50,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:37:50,390 INFO L87 Difference]: Start difference. First operand 234 states and 268 transitions. Second operand 36 states. [2019-11-23 20:37:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:50,678 INFO L93 Difference]: Finished difference Result 476 states and 513 transitions. [2019-11-23 20:37:50,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:37:50,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2019-11-23 20:37:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:50,681 INFO L225 Difference]: With dead ends: 476 [2019-11-23 20:37:50,681 INFO L226 Difference]: Without dead ends: 309 [2019-11-23 20:37:50,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:37:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-11-23 20:37:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 241. [2019-11-23 20:37:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-11-23 20:37:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2019-11-23 20:37:50,688 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 71 [2019-11-23 20:37:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:50,688 INFO L462 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2019-11-23 20:37:50,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:37:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2019-11-23 20:37:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:37:50,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:50,689 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:50,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:50,893 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:50,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2137833997, now seen corresponding path program 33 times [2019-11-23 20:37:50,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:50,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266551082] [2019-11-23 20:37:50,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:51,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266551082] [2019-11-23 20:37:51,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216149625] [2019-11-23 20:37:51,384 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:55,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 20:37:55,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:55,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:37:55,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:55,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:55,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:37:55,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874929407] [2019-11-23 20:37:55,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:37:55,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:37:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:37:55,269 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand 37 states. [2019-11-23 20:37:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:55,632 INFO L93 Difference]: Finished difference Result 490 states and 528 transitions. [2019-11-23 20:37:55,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:37:55,632 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2019-11-23 20:37:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:55,635 INFO L225 Difference]: With dead ends: 490 [2019-11-23 20:37:55,635 INFO L226 Difference]: Without dead ends: 318 [2019-11-23 20:37:55,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:37:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-11-23 20:37:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 248. [2019-11-23 20:37:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-11-23 20:37:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 284 transitions. [2019-11-23 20:37:55,641 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 284 transitions. Word has length 73 [2019-11-23 20:37:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:55,642 INFO L462 AbstractCegarLoop]: Abstraction has 248 states and 284 transitions. [2019-11-23 20:37:55,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:37:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 284 transitions. [2019-11-23 20:37:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:37:55,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:55,643 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:55,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:55,849 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1185480885, now seen corresponding path program 34 times [2019-11-23 20:37:55,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:55,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476467099] [2019-11-23 20:37:55,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:56,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476467099] [2019-11-23 20:37:56,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592130974] [2019-11-23 20:37:56,639 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:56,696 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:56,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:56,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:37:56,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:56,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:56,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:37:56,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226529320] [2019-11-23 20:37:56,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:37:56,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:37:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:37:56,720 INFO L87 Difference]: Start difference. First operand 248 states and 284 transitions. Second operand 38 states. [2019-11-23 20:37:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:57,088 INFO L93 Difference]: Finished difference Result 504 states and 543 transitions. [2019-11-23 20:37:57,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:37:57,089 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2019-11-23 20:37:57,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:57,091 INFO L225 Difference]: With dead ends: 504 [2019-11-23 20:37:57,091 INFO L226 Difference]: Without dead ends: 327 [2019-11-23 20:37:57,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:37:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-11-23 20:37:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2019-11-23 20:37:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-11-23 20:37:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 292 transitions. [2019-11-23 20:37:57,098 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 292 transitions. Word has length 75 [2019-11-23 20:37:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:57,099 INFO L462 AbstractCegarLoop]: Abstraction has 255 states and 292 transitions. [2019-11-23 20:37:57,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:37:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 292 transitions. [2019-11-23 20:37:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:37:57,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:57,100 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:57,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:57,303 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash 564585737, now seen corresponding path program 35 times [2019-11-23 20:37:57,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:57,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195872858] [2019-11-23 20:37:57,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:57,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195872858] [2019-11-23 20:37:57,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214293446] [2019-11-23 20:37:57,873 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:04,551 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:38:04,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:04,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:38:04,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:04,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:04,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:38:04,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66996716] [2019-11-23 20:38:04,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:38:04,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:04,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:38:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:38:04,583 INFO L87 Difference]: Start difference. First operand 255 states and 292 transitions. Second operand 39 states. [2019-11-23 20:38:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:05,085 INFO L93 Difference]: Finished difference Result 518 states and 558 transitions. [2019-11-23 20:38:05,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:38:05,086 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2019-11-23 20:38:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:05,089 INFO L225 Difference]: With dead ends: 518 [2019-11-23 20:38:05,089 INFO L226 Difference]: Without dead ends: 336 [2019-11-23 20:38:05,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:38:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-11-23 20:38:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 262. [2019-11-23 20:38:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2019-11-23 20:38:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2019-11-23 20:38:05,119 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 77 [2019-11-23 20:38:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:05,120 INFO L462 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2019-11-23 20:38:05,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:38:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2019-11-23 20:38:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:38:05,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:05,121 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:05,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:05,322 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:05,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:05,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1248570553, now seen corresponding path program 36 times [2019-11-23 20:38:05,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:05,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846344324] [2019-11-23 20:38:05,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:06,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846344324] [2019-11-23 20:38:06,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013403551] [2019-11-23 20:38:06,181 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:34,752 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 20:38:34,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:34,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:38:34,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:34,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:34,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:38:34,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403686614] [2019-11-23 20:38:34,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:38:34,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:38:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:38:34,797 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand 40 states. [2019-11-23 20:38:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:35,310 INFO L93 Difference]: Finished difference Result 532 states and 573 transitions. [2019-11-23 20:38:35,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:38:35,310 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2019-11-23 20:38:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:35,312 INFO L225 Difference]: With dead ends: 532 [2019-11-23 20:38:35,312 INFO L226 Difference]: Without dead ends: 345 [2019-11-23 20:38:35,313 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:38:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-11-23 20:38:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2019-11-23 20:38:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2019-11-23 20:38:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2019-11-23 20:38:35,320 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 79 [2019-11-23 20:38:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:35,321 INFO L462 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2019-11-23 20:38:35,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:38:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2019-11-23 20:38:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:38:35,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:35,322 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:35,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:35,538 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:35,538 INFO L82 PathProgramCache]: Analyzing trace with hash 64956933, now seen corresponding path program 37 times [2019-11-23 20:38:35,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:35,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900775944] [2019-11-23 20:38:35,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:36,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900775944] [2019-11-23 20:38:36,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954684413] [2019-11-23 20:38:36,302 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:36,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:38:36,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:36,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:36,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:38:36,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400404151] [2019-11-23 20:38:36,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:38:36,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:38:36,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:38:36,368 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand 41 states. [2019-11-23 20:38:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:36,751 INFO L93 Difference]: Finished difference Result 546 states and 588 transitions. [2019-11-23 20:38:36,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:38:36,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2019-11-23 20:38:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:36,754 INFO L225 Difference]: With dead ends: 546 [2019-11-23 20:38:36,754 INFO L226 Difference]: Without dead ends: 354 [2019-11-23 20:38:36,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:38:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-11-23 20:38:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2019-11-23 20:38:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-11-23 20:38:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2019-11-23 20:38:36,762 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 81 [2019-11-23 20:38:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:36,762 INFO L462 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2019-11-23 20:38:36,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:38:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2019-11-23 20:38:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:38:36,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:36,763 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:36,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:36,967 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:36,967 INFO L82 PathProgramCache]: Analyzing trace with hash -355514045, now seen corresponding path program 38 times [2019-11-23 20:38:36,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:36,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288417905] [2019-11-23 20:38:36,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:37,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288417905] [2019-11-23 20:38:37,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10526136] [2019-11-23 20:38:37,863 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:37,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:37,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:37,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:38:37,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:37,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:37,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:38:37,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285347650] [2019-11-23 20:38:37,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:38:37,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:38:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:38:37,978 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand 42 states. [2019-11-23 20:38:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:38,411 INFO L93 Difference]: Finished difference Result 560 states and 603 transitions. [2019-11-23 20:38:38,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:38:38,411 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2019-11-23 20:38:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:38,413 INFO L225 Difference]: With dead ends: 560 [2019-11-23 20:38:38,414 INFO L226 Difference]: Without dead ends: 363 [2019-11-23 20:38:38,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:38:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-11-23 20:38:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 283. [2019-11-23 20:38:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2019-11-23 20:38:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 324 transitions. [2019-11-23 20:38:38,424 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 324 transitions. Word has length 83 [2019-11-23 20:38:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:38,424 INFO L462 AbstractCegarLoop]: Abstraction has 283 states and 324 transitions. [2019-11-23 20:38:38,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:38:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 324 transitions. [2019-11-23 20:38:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:38:38,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:38,425 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:38,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:38,629 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash -701198079, now seen corresponding path program 39 times [2019-11-23 20:38:38,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:38,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127082994] [2019-11-23 20:38:38,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:39,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127082994] [2019-11-23 20:38:39,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430284524] [2019-11-23 20:38:39,267 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:40,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2019-11-23 20:38:40,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:40,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:38:40,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:40,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:40,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:38:40,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539684101] [2019-11-23 20:38:40,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:38:40,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:38:40,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:38:40,312 INFO L87 Difference]: Start difference. First operand 283 states and 324 transitions. Second operand 43 states. [2019-11-23 20:38:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:40,695 INFO L93 Difference]: Finished difference Result 574 states and 618 transitions. [2019-11-23 20:38:40,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:38:40,696 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2019-11-23 20:38:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:40,702 INFO L225 Difference]: With dead ends: 574 [2019-11-23 20:38:40,703 INFO L226 Difference]: Without dead ends: 372 [2019-11-23 20:38:40,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:38:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-11-23 20:38:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 290. [2019-11-23 20:38:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-11-23 20:38:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2019-11-23 20:38:40,711 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 85 [2019-11-23 20:38:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:40,711 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2019-11-23 20:38:40,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:38:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2019-11-23 20:38:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:38:40,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:40,712 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:40,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:40,926 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2103894335, now seen corresponding path program 40 times [2019-11-23 20:38:40,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:40,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566217302] [2019-11-23 20:38:40,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:42,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566217302] [2019-11-23 20:38:42,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995295203] [2019-11-23 20:38:42,067 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:42,120 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:42,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:42,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:38:42,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:42,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:42,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 20:38:42,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316360788] [2019-11-23 20:38:42,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:38:42,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:42,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:38:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:38:42,148 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand 44 states. [2019-11-23 20:38:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:42,556 INFO L93 Difference]: Finished difference Result 588 states and 633 transitions. [2019-11-23 20:38:42,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:38:42,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2019-11-23 20:38:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:42,558 INFO L225 Difference]: With dead ends: 588 [2019-11-23 20:38:42,558 INFO L226 Difference]: Without dead ends: 381 [2019-11-23 20:38:42,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:38:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-11-23 20:38:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 297. [2019-11-23 20:38:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2019-11-23 20:38:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 340 transitions. [2019-11-23 20:38:42,566 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 340 transitions. Word has length 87 [2019-11-23 20:38:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:42,566 INFO L462 AbstractCegarLoop]: Abstraction has 297 states and 340 transitions. [2019-11-23 20:38:42,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:38:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 340 transitions. [2019-11-23 20:38:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:38:42,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:42,567 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:42,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:42,770 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash 558242301, now seen corresponding path program 41 times [2019-11-23 20:38:42,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:42,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044715770] [2019-11-23 20:38:42,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:43,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044715770] [2019-11-23 20:38:43,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060928001] [2019-11-23 20:38:43,482 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:53,075 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2019-11-23 20:38:53,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:53,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:38:53,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:53,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:53,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 20:38:53,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889382166] [2019-11-23 20:38:53,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:38:53,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:38:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:38:53,106 INFO L87 Difference]: Start difference. First operand 297 states and 340 transitions. Second operand 45 states. [2019-11-23 20:38:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:53,561 INFO L93 Difference]: Finished difference Result 602 states and 648 transitions. [2019-11-23 20:38:53,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:38:53,561 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2019-11-23 20:38:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:53,563 INFO L225 Difference]: With dead ends: 602 [2019-11-23 20:38:53,564 INFO L226 Difference]: Without dead ends: 390 [2019-11-23 20:38:53,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:38:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-11-23 20:38:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 304. [2019-11-23 20:38:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-11-23 20:38:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 348 transitions. [2019-11-23 20:38:53,570 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 348 transitions. Word has length 89 [2019-11-23 20:38:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:53,570 INFO L462 AbstractCegarLoop]: Abstraction has 304 states and 348 transitions. [2019-11-23 20:38:53,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:38:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 348 transitions. [2019-11-23 20:38:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:38:53,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:53,571 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:53,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:53,780 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1245322043, now seen corresponding path program 42 times [2019-11-23 20:38:53,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:53,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350305336] [2019-11-23 20:38:53,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:54,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350305336] [2019-11-23 20:38:54,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432128164] [2019-11-23 20:38:54,542 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true