/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapavg2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:36:17,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:36:17,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:36:17,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:36:17,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:36:17,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:36:17,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:36:17,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:36:17,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:36:17,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:36:17,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:36:17,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:36:17,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:36:17,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:36:17,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:36:17,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:36:17,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:36:17,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:36:17,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:36:17,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:36:17,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:36:17,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:36:17,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:36:17,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:36:17,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:36:17,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:36:17,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:36:17,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:36:17,791 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 [2019-11-06 18:36:17,804 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:36:17,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:36:17,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:36:17,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:36:17,806 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:36:17,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:36:17,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:36:17,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:36:17,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:36:17,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:36:17,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:36:17,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:36:17,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:36:17,808 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:36:17,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:36:17,808 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:36:17,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:36:17,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:36:17,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:36:17,809 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:36:17,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:36:17,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:36:17,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:36:17,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:36:17,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:36:17,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:36:17,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:36:17,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:36:17,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:36:18,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:36:18,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:36:18,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:36:18,104 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:36:18,105 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:36:18,106 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg2.i [2019-11-06 18:36:18,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d24d8663/1bf02c644f27450a854c995ea6554bd6/FLAG01f1fbfef [2019-11-06 18:36:18,646 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:36:18,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg2.i [2019-11-06 18:36:18,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d24d8663/1bf02c644f27450a854c995ea6554bd6/FLAG01f1fbfef [2019-11-06 18:36:19,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d24d8663/1bf02c644f27450a854c995ea6554bd6 [2019-11-06 18:36:19,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:36:19,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:36:19,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:36:19,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:36:19,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:36:19,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585b3bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19, skipping insertion in model container [2019-11-06 18:36:19,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,082 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:36:19,104 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:36:19,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:36:19,310 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:36:19,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:36:19,436 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:36:19,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19 WrapperNode [2019-11-06 18:36:19,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:36:19,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:36:19,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:36:19,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:36:19,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:36:19,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:36:19,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:36:19,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:36:19,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (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 [2019-11-06 18:36:19,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:36:19,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:36:19,555 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-11-06 18:36:19,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:36:19,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:36:19,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:36:19,556 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-11-06 18:36:19,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:36:19,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:36:19,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:36:19,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:36:19,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:36:19,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:36:19,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:36:19,853 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:36:19,853 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:36:19,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:36:19 BoogieIcfgContainer [2019-11-06 18:36:19,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:36:19,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:36:19,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:36:19,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:36:19,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:36:19" (1/3) ... [2019-11-06 18:36:19,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c60d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:36:19, skipping insertion in model container [2019-11-06 18:36:19,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (2/3) ... [2019-11-06 18:36:19,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c60d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:36:19, skipping insertion in model container [2019-11-06 18:36:19,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:36:19" (3/3) ... [2019-11-06 18:36:19,866 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg2.i [2019-11-06 18:36:19,876 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:36:19,883 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:36:19,894 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:36:19,919 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:36:19,919 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:36:19,920 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:36:19,920 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:36:19,920 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:36:19,920 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:36:19,920 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:36:19,920 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:36:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:36:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:36:19,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:19,942 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:19,944 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1234592251, now seen corresponding path program 1 times [2019-11-06 18:36:19,956 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:19,956 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943612120] [2019-11-06 18:36:19,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:36:20,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943612120] [2019-11-06 18:36:20,257 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:36:20,257 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:36:20,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790456682] [2019-11-06 18:36:20,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:20,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:20,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:20,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:36:20,281 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:36:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:20,391 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:36:20,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:20,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:36:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:20,402 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:36:20,402 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:36:20,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:36:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:36:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:36:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:36:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:36:20,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:36:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:20,448 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:36:20,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:36:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:36:20,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:20,450 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:20,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1054720325, now seen corresponding path program 1 times [2019-11-06 18:36:20,452 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:20,452 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801032177] [2019-11-06 18:36:20,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:36:20,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801032177] [2019-11-06 18:36:20,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143348535] [2019-11-06 18:36:20,590 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 [2019-11-06 18:36:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:36:20,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:36:20,732 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:36:20,732 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:36:20,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619136954] [2019-11-06 18:36:20,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:20,735 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:20,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:20,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:36:20,736 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:36:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:20,751 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:36:20,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:20,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:36:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:20,753 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:36:20,753 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:36:20,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:36:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:36:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:36:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:36:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:36:20,763 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:36:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:20,763 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:36:20,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:36:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:36:20,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:20,765 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:20,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:20,969 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1286970653, now seen corresponding path program 1 times [2019-11-06 18:36:20,971 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:20,971 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592932933] [2019-11-06 18:36:20,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:36:21,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592932933] [2019-11-06 18:36:21,072 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306214678] [2019-11-06 18:36:21,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:36:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:36:21,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:36:21,176 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:36:21,176 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:36:21,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402566525] [2019-11-06 18:36:21,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:21,177 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:21,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:36:21,179 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:36:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:21,205 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:36:21,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:21,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:36:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:21,207 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:36:21,207 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:36:21,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:36:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:36:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:36:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:36:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:36:21,224 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:36:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:21,224 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:36:21,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:36:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:36:21,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:21,229 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:21,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:21,429 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:21,430 INFO L82 PathProgramCache]: Analyzing trace with hash -631694085, now seen corresponding path program 1 times [2019-11-06 18:36:21,430 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:21,430 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741297836] [2019-11-06 18:36:21,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:36:21,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741297836] [2019-11-06 18:36:21,598 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850939375] [2019-11-06 18:36:21,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:36:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:36:21,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:36:21,690 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:36:21,690 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:36:21,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745660421] [2019-11-06 18:36:21,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:21,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:21,692 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:36:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:21,714 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:36:21,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:21,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:36:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:21,716 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:36:21,716 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:36:21,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:36:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:36:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:36:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:36:21,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:36:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:21,725 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:36:21,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:36:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:36:21,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:21,727 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:21,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:21,930 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash -490156423, now seen corresponding path program 1 times [2019-11-06 18:36:21,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:21,932 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026821851] [2019-11-06 18:36:21,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:36:22,063 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026821851] [2019-11-06 18:36:22,063 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019208612] [2019-11-06 18:36:22,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:36:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:36:22,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:36:22,148 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:22,148 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:36:22,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425545964] [2019-11-06 18:36:22,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:36:22,151 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:22,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:36:22,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:36:22,151 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:36:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:22,273 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:36:22,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:36:22,278 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:36:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:22,279 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:36:22,279 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:36:22,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:36:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:36:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:36:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:36:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:36:22,286 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:36:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:22,286 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:36:22,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:36:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:36:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:36:22,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:22,288 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:22,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:22,489 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash -170749255, now seen corresponding path program 2 times [2019-11-06 18:36:22,490 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:22,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506019690] [2019-11-06 18:36:22,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:36:22,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506019690] [2019-11-06 18:36:22,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052181326] [2019-11-06 18:36:22,634 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 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 [2019-11-06 18:36:22,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:22,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:22,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:36:22,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:36:22,762 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:22,762 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:36:22,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208421729] [2019-11-06 18:36:22,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:36:22,764 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:22,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:36:22,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:22,764 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:36:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:22,863 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:36:22,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:36:22,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:36:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:22,865 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:36:22,865 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:36:22,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:36:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:36:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:36:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:36:22,873 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:36:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:22,873 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:36:22,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:36:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:36:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:36:22,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:22,875 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:23,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:23,080 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 767810715, now seen corresponding path program 3 times [2019-11-06 18:36:23,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:23,082 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928744743] [2019-11-06 18:36:23,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:36:23,197 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928744743] [2019-11-06 18:36:23,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435157849] [2019-11-06 18:36:23,198 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 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 [2019-11-06 18:36:23,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:36:23,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:23,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:36:23,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:36:23,292 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:23,292 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:36:23,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125771490] [2019-11-06 18:36:23,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:36:23,293 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:36:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,294 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:36:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:23,434 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:36:23,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:36:23,435 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:36:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:23,436 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:36:23,436 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:36:23,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:36:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:36:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:36:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:36:23,449 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:36:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:23,449 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:36:23,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:36:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:36:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:36:23,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:23,453 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:23,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:23,657 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1024452869, now seen corresponding path program 4 times [2019-11-06 18:36:23,658 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:23,658 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101269731] [2019-11-06 18:36:23,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:36:23,744 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101269731] [2019-11-06 18:36:23,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276828218] [2019-11-06 18:36:23,745 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 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 [2019-11-06 18:36:23,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:23,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:23,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:36:23,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:36:23,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:23,844 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:36:23,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523171451] [2019-11-06 18:36:23,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:36:23,846 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:23,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:36:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,848 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:36:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:23,972 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:36:23,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:36:23,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:36:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:23,973 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:36:23,973 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:36:23,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:36:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:36:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:36:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:36:23,980 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:36:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:23,980 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:36:23,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:36:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:36:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:36:23,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:23,982 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:24,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:24,192 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash -599330979, now seen corresponding path program 5 times [2019-11-06 18:36:24,192 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:24,192 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646038949] [2019-11-06 18:36:24,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:36:24,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646038949] [2019-11-06 18:36:24,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207646983] [2019-11-06 18:36:24,322 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 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 [2019-11-06 18:36:24,404 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:36:24,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:24,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:36:24,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:36:24,446 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:24,448 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:36:24,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577756381] [2019-11-06 18:36:24,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:36:24,449 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:36:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:36:24,450 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:36:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:24,620 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:36:24,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:36:24,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:36:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:24,622 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:36:24,622 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:36:24,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:36:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:36:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:36:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:36:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:36:24,628 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:36:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:24,629 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:36:24,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:36:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:36:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:36:24,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:24,630 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:24,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:24,836 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1877447581, now seen corresponding path program 6 times [2019-11-06 18:36:24,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:24,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396816568] [2019-11-06 18:36:24,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:36:24,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396816568] [2019-11-06 18:36:24,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284181963] [2019-11-06 18:36:24,962 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 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 [2019-11-06 18:36:25,083 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:36:25,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:25,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:36:25,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:36:25,170 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:25,170 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:36:25,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859984461] [2019-11-06 18:36:25,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:36:25,171 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:36:25,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:36:25,172 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:36:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:25,349 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:36:25,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:36:25,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:36:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:25,350 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:36:25,351 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:36:25,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:36:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:36:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:36:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:36:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:36:25,357 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:36:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:25,357 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:36:25,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:36:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:36:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:36:25,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:25,359 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:25,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:25,563 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash -611990051, now seen corresponding path program 7 times [2019-11-06 18:36:25,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:25,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312787386] [2019-11-06 18:36:25,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:25,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312787386] [2019-11-06 18:36:25,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277942159] [2019-11-06 18:36:25,735 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 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 [2019-11-06 18:36:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:25,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:25,832 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:25,832 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:36:25,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331565264] [2019-11-06 18:36:25,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:36:25,834 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:36:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:36:25,835 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:36:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:25,926 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:36:25,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:36:25,926 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:36:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:25,927 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:36:25,927 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:36:25,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:36:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:36:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:36:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:36:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:36:25,934 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:36:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:25,934 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:36:25,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:36:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:36:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:36:25,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:25,936 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:26,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:26,146 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:26,147 INFO L82 PathProgramCache]: Analyzing trace with hash 152046015, now seen corresponding path program 8 times [2019-11-06 18:36:26,147 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:26,147 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183442987] [2019-11-06 18:36:26,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:26,294 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183442987] [2019-11-06 18:36:26,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565551481] [2019-11-06 18:36:26,295 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 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 [2019-11-06 18:36:26,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:26,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:26,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:26,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:26,391 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:26,391 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:36:26,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037420032] [2019-11-06 18:36:26,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:36:26,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:36:26,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:36:26,393 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:36:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:26,487 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:36:26,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:36:26,488 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:36:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:26,488 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:36:26,488 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:36:26,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:36:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:36:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:36:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:36:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:36:26,497 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:36:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:26,497 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:36:26,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:36:26,497 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:36:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:36:26,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:26,498 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:26,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:26,702 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash -48702175, now seen corresponding path program 9 times [2019-11-06 18:36:26,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:26,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57899955] [2019-11-06 18:36:26,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:26,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57899955] [2019-11-06 18:36:26,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206843537] [2019-11-06 18:36:26,856 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 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 [2019-11-06 18:36:26,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:36:26,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:26,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:36:26,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:36:26,963 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:26,964 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:36:26,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850793173] [2019-11-06 18:36:26,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:36:26,965 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:36:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:36:26,966 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:36:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:27,134 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:36:27,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:36:27,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:36:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:27,135 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:36:27,135 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:36:27,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:36:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:36:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:36:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:36:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:36:27,143 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:36:27,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:27,143 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:36:27,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:36:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:36:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:36:27,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:27,145 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:27,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:27,348 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1677678719, now seen corresponding path program 10 times [2019-11-06 18:36:27,349 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:27,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227281997] [2019-11-06 18:36:27,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:36:27,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227281997] [2019-11-06 18:36:27,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797189078] [2019-11-06 18:36:27,528 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 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 [2019-11-06 18:36:27,601 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:27,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:27,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:36:27,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:36:27,677 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:27,677 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:36:27,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713467842] [2019-11-06 18:36:27,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:36:27,678 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:36:27,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:36:27,678 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:36:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:28,017 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:36:28,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:36:28,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:36:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:28,018 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:36:28,018 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:36:28,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:36:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:36:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:36:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:36:28,027 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:36:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:28,029 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:36:28,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:36:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:36:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:36:28,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:28,031 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:28,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:28,236 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash 531544513, now seen corresponding path program 11 times [2019-11-06 18:36:28,236 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:28,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826030265] [2019-11-06 18:36:28,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:36:28,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826030265] [2019-11-06 18:36:28,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128155940] [2019-11-06 18:36:28,419 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 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 [2019-11-06 18:36:28,703 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:36:28,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:28,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:36:28,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:36:28,778 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:28,778 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:36:28,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41567436] [2019-11-06 18:36:28,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:36:28,779 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:36:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:36:28,780 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:36:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:29,055 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:36:29,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:36:29,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:36:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:29,057 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:36:29,057 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:36:29,058 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:36:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:36:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:36:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:36:29,063 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:36:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:29,063 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:36:29,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:36:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:36:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:36:29,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:29,065 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:29,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:29,274 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:29,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:29,275 INFO L82 PathProgramCache]: Analyzing trace with hash 24697345, now seen corresponding path program 12 times [2019-11-06 18:36:29,275 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:29,275 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543690686] [2019-11-06 18:36:29,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:36:29,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543690686] [2019-11-06 18:36:29,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053543115] [2019-11-06 18:36:29,504 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 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 [2019-11-06 18:36:29,668 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:36:29,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:29,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:36:29,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:36:29,720 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:29,720 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:36:29,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173322944] [2019-11-06 18:36:29,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:36:29,721 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:36:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:36:29,722 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:36:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:29,903 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:36:29,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:36:29,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:36:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:29,905 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:36:29,905 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:36:29,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:36:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:36:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:36:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:36:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:36:29,913 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:36:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:29,913 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:36:29,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:36:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:36:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:36:29,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:29,915 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:30,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:30,119 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash -564086943, now seen corresponding path program 13 times [2019-11-06 18:36:30,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:30,120 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35266760] [2019-11-06 18:36:30,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:30,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35266760] [2019-11-06 18:36:30,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931522587] [2019-11-06 18:36:30,330 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 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 [2019-11-06 18:36:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:36:30,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:30,445 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:30,445 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:36:30,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264189979] [2019-11-06 18:36:30,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:36:30,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:30,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:36:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:36:30,447 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:36:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:30,560 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:36:30,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:36:30,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:36:30,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:30,561 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:36:30,562 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:36:30,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:36:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:36:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:36:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:36:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:36:30,575 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:36:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:30,575 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:36:30,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:36:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:36:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:36:30,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:30,580 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:30,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:30,784 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 440415299, now seen corresponding path program 14 times [2019-11-06 18:36:30,785 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:30,785 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469812542] [2019-11-06 18:36:30,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:31,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469812542] [2019-11-06 18:36:31,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156984627] [2019-11-06 18:36:31,022 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 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 [2019-11-06 18:36:31,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:31,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:31,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:36:31,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:31,126 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:31,126 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:36:31,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929029232] [2019-11-06 18:36:31,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:36:31,128 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:36:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:36:31,128 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:36:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:31,240 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:36:31,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:36:31,240 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:36:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:31,242 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:36:31,242 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:36:31,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:36:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:36:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:36:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:36:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:36:31,248 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:36:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:31,249 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:36:31,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:36:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:36:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:36:31,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:31,250 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:31,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:31,455 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:31,456 INFO L82 PathProgramCache]: Analyzing trace with hash -600571739, now seen corresponding path program 15 times [2019-11-06 18:36:31,456 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:31,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025304241] [2019-11-06 18:36:31,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:31,706 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025304241] [2019-11-06 18:36:31,706 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056262726] [2019-11-06 18:36:31,707 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 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 [2019-11-06 18:36:31,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:36:31,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:31,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:36:31,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:36:31,886 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:31,886 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:36:31,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130546023] [2019-11-06 18:36:31,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:36:31,886 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:31,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:36:31,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:31,887 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:36:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:32,105 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:36:32,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:36:32,106 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:36:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:32,107 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:36:32,107 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:36:32,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:36:32,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:36:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:36:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:36:32,113 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:36:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:32,113 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:36:32,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:36:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:36:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:36:32,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:32,114 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:32,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:32,315 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:32,316 INFO L82 PathProgramCache]: Analyzing trace with hash 25314053, now seen corresponding path program 16 times [2019-11-06 18:36:32,316 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:32,316 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516562212] [2019-11-06 18:36:32,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:36:32,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516562212] [2019-11-06 18:36:32,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815549950] [2019-11-06 18:36:32,547 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 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 [2019-11-06 18:36:32,631 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:32,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:32,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:36:32,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:36:32,660 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:32,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:36:32,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081134075] [2019-11-06 18:36:32,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:36:32,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:36:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:36:32,662 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:36:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:32,920 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:36:32,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:36:32,921 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:36:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:32,922 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:36:32,922 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:36:32,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:36:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:36:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:36:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:36:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:36:32,931 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:36:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:32,931 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:36:32,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:36:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:36:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:36:32,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:32,933 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:33,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:33,139 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash -124797465, now seen corresponding path program 17 times [2019-11-06 18:36:33,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:33,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086587459] [2019-11-06 18:36:33,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:36:33,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086587459] [2019-11-06 18:36:33,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103244258] [2019-11-06 18:36:33,429 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 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 [2019-11-06 18:36:34,162 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:36:34,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:34,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:36:34,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:36:34,281 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:34,281 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:36:34,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76482509] [2019-11-06 18:36:34,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:36:34,282 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:34,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:36:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:36:34,283 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:36:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:34,654 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:36:34,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:36:34,655 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:36:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:34,656 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:36:34,656 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:36:34,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:36:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:36:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:36:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:36:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:36:34,663 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:36:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:34,663 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:36:34,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:36:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:36:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:36:34,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:34,665 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:34,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:34,871 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash 933335591, now seen corresponding path program 18 times [2019-11-06 18:36:34,872 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:34,872 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661406601] [2019-11-06 18:36:34,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:36:35,216 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661406601] [2019-11-06 18:36:35,216 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094624029] [2019-11-06 18:36:35,216 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 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 [2019-11-06 18:36:35,996 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:36:35,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:35,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:36:36,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 18:36:36,121 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:36,121 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 18:36:36,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135773349] [2019-11-06 18:36:36,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:36:36,122 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:36,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:36:36,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:36:36,123 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 18:36:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:36,416 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 18:36:36,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:36:36,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 18:36:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:36,420 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:36:36,420 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:36:36,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:36:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:36:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:36:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:36:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 18:36:36,426 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 18:36:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:36,426 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 18:36:36,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:36:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 18:36:36,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:36:36,427 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:36,427 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:36,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:36,632 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash 34033799, now seen corresponding path program 19 times [2019-11-06 18:36:36,633 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:36,633 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5114419] [2019-11-06 18:36:36,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:36,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5114419] [2019-11-06 18:36:36,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134879199] [2019-11-06 18:36:36,974 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 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 [2019-11-06 18:36:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:36:37,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:37,180 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:37,180 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:36:37,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673707421] [2019-11-06 18:36:37,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:36:37,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:36:37,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:37,191 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 18:36:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:37,425 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 18:36:37,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:36:37,426 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 18:36:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:37,427 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:36:37,427 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:36:37,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:36:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:36:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:36:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:36:37,442 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 18:36:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:37,443 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:36:37,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:36:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:36:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:36:37,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:37,444 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:37,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:37,645 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash 44767209, now seen corresponding path program 20 times [2019-11-06 18:36:37,646 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:37,646 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649974187] [2019-11-06 18:36:37,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:37,963 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649974187] [2019-11-06 18:36:37,963 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974647702] [2019-11-06 18:36:37,963 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 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 [2019-11-06 18:36:38,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:38,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:38,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:36:38,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:38,088 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:38,088 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:36:38,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318320677] [2019-11-06 18:36:38,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:36:38,089 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:38,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:36:38,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:36:38,090 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:36:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:38,319 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:36:38,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:36:38,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:36:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:38,320 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:36:38,320 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:36:38,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:36:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:36:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:36:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:36:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:36:38,325 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:36:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:38,326 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:36:38,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:36:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:36:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:36:38,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:38,327 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:38,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:38,531 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1769639627, now seen corresponding path program 21 times [2019-11-06 18:36:38,532 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:38,533 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866257227] [2019-11-06 18:36:38,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:38,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866257227] [2019-11-06 18:36:38,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815434460] [2019-11-06 18:36:38,861 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 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 [2019-11-06 18:36:39,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:36:39,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:39,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:36:39,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 18:36:39,161 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:39,161 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 18:36:39,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135787562] [2019-11-06 18:36:39,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:36:39,162 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:39,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:36:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:39,162 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 18:36:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:39,484 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 18:36:39,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:36:39,484 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 18:36:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:39,485 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:36:39,486 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:36:39,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:36:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:36:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:36:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 18:36:39,491 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 18:36:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:39,492 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 18:36:39,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:36:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 18:36:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 18:36:39,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:39,493 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:39,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:39,694 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1205252651, now seen corresponding path program 22 times [2019-11-06 18:36:39,694 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:39,694 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803352052] [2019-11-06 18:36:39,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:40,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803352052] [2019-11-06 18:36:40,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467472863] [2019-11-06 18:36:40,113 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 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 [2019-11-06 18:36:40,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:40,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:40,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:36:40,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:40,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:40,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:36:40,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275749991] [2019-11-06 18:36:40,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:36:40,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:36:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:40,300 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 18:36:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:40,490 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 18:36:40,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:36:40,490 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 18:36:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:40,491 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:36:40,491 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:36:40,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:36:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:36:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:36:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:36:40,498 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 18:36:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:40,499 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:36:40,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:36:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:36:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:36:40,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:40,500 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:40,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:40,704 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash -369756275, now seen corresponding path program 23 times [2019-11-06 18:36:40,705 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:40,705 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055600270] [2019-11-06 18:36:40,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:41,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055600270] [2019-11-06 18:36:41,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701051299] [2019-11-06 18:36:41,172 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 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 [2019-11-06 18:36:43,860 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 18:36:43,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:43,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:43,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 18:36:44,032 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:44,032 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 18:36:44,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595056667] [2019-11-06 18:36:44,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:36:44,033 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:36:44,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:36:44,034 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 18:36:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:44,586 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 18:36:44,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:36:44,587 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 18:36:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:44,588 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:36:44,589 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:36:44,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:36:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 18:36:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 18:36:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 18:36:44,596 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 18:36:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:44,597 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 18:36:44,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:36:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 18:36:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 18:36:44,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:44,601 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:44,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:44,820 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 585301965, now seen corresponding path program 24 times [2019-11-06 18:36:44,821 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:44,821 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301549551] [2019-11-06 18:36:44,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:36:45,319 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301549551] [2019-11-06 18:36:45,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892923079] [2019-11-06 18:36:45,320 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 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 [2019-11-06 18:36:46,935 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:36:46,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:46,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:36:46,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 18:36:47,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:47,108 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:36:47,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070543571] [2019-11-06 18:36:47,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:36:47,109 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:36:47,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:47,110 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 18:36:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:47,436 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 18:36:47,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:36:47,436 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 18:36:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:47,437 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:36:47,437 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:36:47,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:36:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 18:36:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:36:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 18:36:47,443 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 18:36:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:47,443 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 18:36:47,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:36:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 18:36:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:36:47,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:47,445 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:47,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:47,650 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:47,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1800822573, now seen corresponding path program 25 times [2019-11-06 18:36:47,651 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:47,651 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497722390] [2019-11-06 18:36:47,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:48,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497722390] [2019-11-06 18:36:48,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456790686] [2019-11-06 18:36:48,032 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 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 [2019-11-06 18:36:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:48,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:36:48,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:48,252 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:48,252 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:36:48,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565463891] [2019-11-06 18:36:48,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:36:48,253 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:36:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:48,255 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 18:36:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:48,658 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 18:36:48,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:36:48,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 18:36:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:48,660 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:36:48,660 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:36:48,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:36:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:36:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:36:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:36:48,667 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 18:36:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:48,667 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:36:48,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:36:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:36:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 18:36:48,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:48,668 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:48,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:48,872 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -187199217, now seen corresponding path program 26 times [2019-11-06 18:36:48,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:48,873 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448991560] [2019-11-06 18:36:48,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:49,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448991560] [2019-11-06 18:36:49,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761228357] [2019-11-06 18:36:49,361 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 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 [2019-11-06 18:36:49,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:49,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:49,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:36:49,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:49,502 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:49,503 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:36:49,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105538803] [2019-11-06 18:36:49,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:36:49,503 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:36:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:49,504 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:36:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:49,661 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:36:49,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:36:49,662 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 18:36:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:49,663 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:36:49,663 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:36:49,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:36:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:36:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:36:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:36:49,675 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 18:36:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:49,676 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:36:49,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:36:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:36:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 18:36:49,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:49,677 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:49,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:49,880 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:49,881 INFO L82 PathProgramCache]: Analyzing trace with hash 584307313, now seen corresponding path program 27 times [2019-11-06 18:36:49,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:49,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966919214] [2019-11-06 18:36:49,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:50,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966919214] [2019-11-06 18:36:50,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908524893] [2019-11-06 18:36:50,473 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 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 [2019-11-06 18:36:50,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:36:50,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:50,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:50,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 18:36:50,919 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:50,919 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 18:36:50,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284203275] [2019-11-06 18:36:50,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:36:50,920 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:50,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:36:50,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:50,921 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 18:36:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:51,446 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 18:36:51,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:36:51,447 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 18:36:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:51,448 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:36:51,448 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:36:51,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 18:36:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:36:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 18:36:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 18:36:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 18:36:51,454 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 18:36:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:51,455 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 18:36:51,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:36:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 18:36:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:36:51,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:51,456 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:51,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:51,658 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1229503153, now seen corresponding path program 28 times [2019-11-06 18:36:51,660 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:51,660 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691259616] [2019-11-06 18:36:51,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:36:52,174 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691259616] [2019-11-06 18:36:52,174 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697905645] [2019-11-06 18:36:52,174 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 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 [2019-11-06 18:36:52,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:52,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:52,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:36:52,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 18:36:52,519 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:52,519 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 18:36:52,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060951696] [2019-11-06 18:36:52,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:36:52,519 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:52,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:36:52,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:36:52,520 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-11-06 18:36:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:53,037 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-11-06 18:36:53,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:36:53,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-11-06 18:36:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:53,039 INFO L225 Difference]: With dead ends: 169 [2019-11-06 18:36:53,039 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 18:36:53,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 18:36:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 18:36:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-11-06 18:36:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:36:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-11-06 18:36:53,054 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-11-06 18:36:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:53,055 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-11-06 18:36:53,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:36:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-11-06 18:36:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:36:53,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:53,057 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:53,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:53,262 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -46911247, now seen corresponding path program 29 times [2019-11-06 18:36:53,263 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:53,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528764971] [2019-11-06 18:36:53,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:36:54,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528764971] [2019-11-06 18:36:54,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470508028] [2019-11-06 18:36:54,194 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 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