/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:20:17,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:20:17,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:20:17,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:20:17,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:20:17,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:20:17,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:20:17,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:20:17,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:20:17,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:20:17,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:20:17,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:20:17,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:20:17,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:20:17,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:20:17,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:20:17,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:20:17,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:20:17,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:20:17,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:20:17,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:20:17,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:20:17,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:20:17,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:20:17,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:20:17,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:20:17,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:20:17,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:20:17,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:20:17,917 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:20:17,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:20:17,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:20:17,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:20:17,919 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:20:17,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:20:17,919 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:20:17,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:20:17,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:20:17,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:20:17,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:20:17,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:20:17,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:20:17,921 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:20:17,921 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:20:17,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:20:17,921 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:20:17,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:20:17,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:20:17,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:20:17,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:20:17,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:20:17,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:17,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:20:17,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:20:17,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:20:17,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:20:17,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:20:17,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:20:17,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:20:18,195 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:20:18,206 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:20:18,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:20:18,211 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:20:18,211 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:20:18,212 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-11-23 20:20:18,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f055844f/ee3680bbc9f1497989a3b859a1ab5dc0/FLAGed3251c81 [2019-11-23 20:20:18,733 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:20:18,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-11-23 20:20:18,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f055844f/ee3680bbc9f1497989a3b859a1ab5dc0/FLAGed3251c81 [2019-11-23 20:20:19,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f055844f/ee3680bbc9f1497989a3b859a1ab5dc0 [2019-11-23 20:20:19,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:20:19,161 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:20:19,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:19,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:20:19,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:20:19,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449a522b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19, skipping insertion in model container [2019-11-23 20:20:19,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:20:19,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:20:19,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:19,404 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:20:19,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:19,446 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:20:19,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19 WrapperNode [2019-11-23 20:20:19,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:19,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:19,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:20:19,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:20:19,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:19,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:20:19,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:20:19,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:20:19,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (1/1) ... [2019-11-23 20:20:19,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:20:19,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:20:19,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:20:19,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:20:19,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (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 [2019-11-23 20:20:19,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:20:19,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:20:19,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:20:19,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:20:19,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:20:19,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:20:20,010 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:20:20,010 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-23 20:20:20,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:20 BoogieIcfgContainer [2019-11-23 20:20:20,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:20:20,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:20:20,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:20:20,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:20:20,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:20:19" (1/3) ... [2019-11-23 20:20:20,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd0c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:20, skipping insertion in model container [2019-11-23 20:20:20,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:19" (2/3) ... [2019-11-23 20:20:20,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd0c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:20, skipping insertion in model container [2019-11-23 20:20:20,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:20" (3/3) ... [2019-11-23 20:20:20,024 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2019-11-23 20:20:20,033 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:20:20,042 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 20:20:20,053 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 20:20:20,074 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:20:20,074 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:20:20,074 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:20:20,075 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:20:20,075 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:20:20,075 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:20:20,075 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:20:20,075 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:20:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-23 20:20:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:20,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:20,095 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,095 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,099 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2019-11-23 20:20:20,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608830708] [2019-11-23 20:20:20,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:20,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608830708] [2019-11-23 20:20:20,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:20,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:20:20,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208279466] [2019-11-23 20:20:20,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:20:20,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:20:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:20,246 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-23 20:20:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:20,272 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2019-11-23 20:20:20,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:20:20,274 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:20:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:20,285 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:20:20,285 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:20:20,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:20:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:20:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:20:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:20:20,343 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2019-11-23 20:20:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:20,343 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:20:20,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:20:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:20:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:20,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:20,346 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,347 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2019-11-23 20:20:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339470489] [2019-11-23 20:20:20,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:20,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339470489] [2019-11-23 20:20:20,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:20,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:20,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884136654] [2019-11-23 20:20:20,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:20,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:20,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:20,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:20,404 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2019-11-23 20:20:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:20,509 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2019-11-23 20:20:20,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:20,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:20:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:20,513 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:20:20,513 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:20:20,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:20:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2019-11-23 20:20:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:20:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-11-23 20:20:20,530 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2019-11-23 20:20:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:20,530 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-11-23 20:20:20,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-11-23 20:20:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:20,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:20,532 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,532 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2019-11-23 20:20:20,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521375624] [2019-11-23 20:20:20,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:20,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521375624] [2019-11-23 20:20:20,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:20,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:20:20,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912558623] [2019-11-23 20:20:20,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:20,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:20:20,617 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2019-11-23 20:20:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:20,763 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2019-11-23 20:20:20,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:20,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:20:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:20,766 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:20:20,766 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:20:20,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:20:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-11-23 20:20:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:20:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-23 20:20:20,779 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 14 [2019-11-23 20:20:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:20,779 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-23 20:20:20,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-11-23 20:20:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:20:20,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:20,780 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,781 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1875256558, now seen corresponding path program 1 times [2019-11-23 20:20:20,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332141700] [2019-11-23 20:20:20,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:20,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332141700] [2019-11-23 20:20:20,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167236043] [2019-11-23 20:20:20,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:20,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:20,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:20,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:20:20,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755509498] [2019-11-23 20:20:20,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:20:20,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:20:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:20,965 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 7 states. [2019-11-23 20:20:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:21,183 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2019-11-23 20:20:21,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:21,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-23 20:20:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:21,185 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:20:21,185 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:20:21,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:20:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:20:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2019-11-23 20:20:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:20:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2019-11-23 20:20:21,195 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 17 [2019-11-23 20:20:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:21,196 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2019-11-23 20:20:21,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:20:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2019-11-23 20:20:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:20:21,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:21,197 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:21,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:21,410 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:21,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1526924034, now seen corresponding path program 2 times [2019-11-23 20:20:21,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:21,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874868400] [2019-11-23 20:20:21,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:20:21,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874868400] [2019-11-23 20:20:21,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351102611] [2019-11-23 20:20:21,485 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:21,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:20:21,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:21,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:21,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:20:21,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:21,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-11-23 20:20:21,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924676052] [2019-11-23 20:20:21,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:21,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:21,544 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 4 states. [2019-11-23 20:20:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:21,612 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2019-11-23 20:20:21,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:21,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-23 20:20:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:21,613 INFO L225 Difference]: With dead ends: 105 [2019-11-23 20:20:21,613 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:20:21,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:20:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-23 20:20:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:20:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2019-11-23 20:20:21,621 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 22 [2019-11-23 20:20:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:21,622 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2019-11-23 20:20:21,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2019-11-23 20:20:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:20:21,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:21,623 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:21,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:21,826 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash 88778507, now seen corresponding path program 1 times [2019-11-23 20:20:21,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:21,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804162729] [2019-11-23 20:20:21,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:20:21,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804162729] [2019-11-23 20:20:21,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394506940] [2019-11-23 20:20:21,919 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 [2019-11-23 20:20:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:21,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:21,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:20:22,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:22,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:20:22,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979667350] [2019-11-23 20:20:22,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:20:22,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:22,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:20:22,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:20:22,016 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 9 states. [2019-11-23 20:20:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:22,263 INFO L93 Difference]: Finished difference Result 170 states and 220 transitions. [2019-11-23 20:20:22,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:22,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2019-11-23 20:20:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:22,265 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:20:22,265 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 20:20:22,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 20:20:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2019-11-23 20:20:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:20:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2019-11-23 20:20:22,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 23 [2019-11-23 20:20:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:22,291 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2019-11-23 20:20:22,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:20:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2019-11-23 20:20:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:20:22,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:22,292 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:22,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:22,496 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash 143412543, now seen corresponding path program 2 times [2019-11-23 20:20:22,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:22,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516958113] [2019-11-23 20:20:22,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:20:22,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516958113] [2019-11-23 20:20:22,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546562536] [2019-11-23 20:20:22,600 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:22,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:22,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:22,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:22,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:20:22,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:22,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:20:22,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172696133] [2019-11-23 20:20:22,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:22,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:22,736 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 11 states. [2019-11-23 20:20:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:23,126 INFO L93 Difference]: Finished difference Result 231 states and 302 transitions. [2019-11-23 20:20:23,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:20:23,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-23 20:20:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:23,127 INFO L225 Difference]: With dead ends: 231 [2019-11-23 20:20:23,128 INFO L226 Difference]: Without dead ends: 155 [2019-11-23 20:20:23,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-11-23 20:20:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 115. [2019-11-23 20:20:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:20:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 151 transitions. [2019-11-23 20:20:23,153 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 151 transitions. Word has length 28 [2019-11-23 20:20:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:23,157 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 151 transitions. [2019-11-23 20:20:23,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 151 transitions. [2019-11-23 20:20:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:20:23,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:23,158 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:23,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:23,359 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:23,359 INFO L82 PathProgramCache]: Analyzing trace with hash -77734201, now seen corresponding path program 3 times [2019-11-23 20:20:23,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:23,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284985946] [2019-11-23 20:20:23,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:20:23,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284985946] [2019-11-23 20:20:23,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10806552] [2019-11-23 20:20:23,476 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:23,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:20:23,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:23,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:23,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:20:23,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:23,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2019-11-23 20:20:23,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117761365] [2019-11-23 20:20:23,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:20:23,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:20:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:23,566 INFO L87 Difference]: Start difference. First operand 115 states and 151 transitions. Second operand 6 states. [2019-11-23 20:20:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:23,684 INFO L93 Difference]: Finished difference Result 226 states and 295 transitions. [2019-11-23 20:20:23,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:20:23,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-11-23 20:20:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:23,686 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:20:23,687 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:20:23,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:20:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2019-11-23 20:20:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 20:20:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2019-11-23 20:20:23,697 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 33 [2019-11-23 20:20:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:23,698 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2019-11-23 20:20:23,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:20:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2019-11-23 20:20:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:20:23,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:23,699 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:23,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:23,910 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1852741563, now seen corresponding path program 1 times [2019-11-23 20:20:23,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:23,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192693463] [2019-11-23 20:20:23,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:20:23,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192693463] [2019-11-23 20:20:23,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415493152] [2019-11-23 20:20:23,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:24,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:24,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:20:24,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:24,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-23 20:20:24,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110982031] [2019-11-23 20:20:24,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:20:24,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:24,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:20:24,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:24,106 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand 13 states. [2019-11-23 20:20:24,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:24,470 INFO L93 Difference]: Finished difference Result 307 states and 404 transitions. [2019-11-23 20:20:24,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:20:24,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-23 20:20:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:24,474 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:20:24,474 INFO L226 Difference]: Without dead ends: 200 [2019-11-23 20:20:24,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:20:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-23 20:20:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 151. [2019-11-23 20:20:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-23 20:20:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2019-11-23 20:20:24,484 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 33 [2019-11-23 20:20:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:24,484 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2019-11-23 20:20:24,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:20:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2019-11-23 20:20:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:20:24,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:24,485 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:24,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:24,697 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:24,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1908013825, now seen corresponding path program 2 times [2019-11-23 20:20:24,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:24,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150130081] [2019-11-23 20:20:24,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:20:24,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150130081] [2019-11-23 20:20:24,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877517487] [2019-11-23 20:20:24,803 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:24,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:24,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:24,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:24,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:20:24,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:24,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-23 20:20:24,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709319432] [2019-11-23 20:20:24,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:20:24,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:20:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:24,944 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand 15 states. [2019-11-23 20:20:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,613 INFO L93 Difference]: Finished difference Result 380 states and 502 transitions. [2019-11-23 20:20:25,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:20:25,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-11-23 20:20:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,618 INFO L225 Difference]: With dead ends: 380 [2019-11-23 20:20:25,618 INFO L226 Difference]: Without dead ends: 242 [2019-11-23 20:20:25,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=433, Invalid=827, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:20:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-11-23 20:20:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 187. [2019-11-23 20:20:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-11-23 20:20:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 249 transitions. [2019-11-23 20:20:25,628 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 249 transitions. Word has length 38 [2019-11-23 20:20:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,629 INFO L462 AbstractCegarLoop]: Abstraction has 187 states and 249 transitions. [2019-11-23 20:20:25,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:20:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 249 transitions. [2019-11-23 20:20:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:20:25,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,630 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:25,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:25,838 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1198249985, now seen corresponding path program 3 times [2019-11-23 20:20:25,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:25,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315470504] [2019-11-23 20:20:25,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:20:25,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315470504] [2019-11-23 20:20:25,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875381766] [2019-11-23 20:20:25,949 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:20:26,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:26,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:26,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:26,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-23 20:20:26,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645513153] [2019-11-23 20:20:26,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:26,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:26,149 INFO L87 Difference]: Start difference. First operand 187 states and 249 transitions. Second operand 17 states. [2019-11-23 20:20:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,486 INFO L93 Difference]: Finished difference Result 366 states and 491 transitions. [2019-11-23 20:20:26,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:20:26,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2019-11-23 20:20:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,490 INFO L225 Difference]: With dead ends: 366 [2019-11-23 20:20:26,490 INFO L226 Difference]: Without dead ends: 201 [2019-11-23 20:20:26,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:20:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-23 20:20:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2019-11-23 20:20:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-11-23 20:20:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 256 transitions. [2019-11-23 20:20:26,502 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 256 transitions. Word has length 43 [2019-11-23 20:20:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,503 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 256 transitions. [2019-11-23 20:20:26,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 256 transitions. [2019-11-23 20:20:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:20:26,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,504 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,708 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2060271675, now seen corresponding path program 1 times [2019-11-23 20:20:26,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204826311] [2019-11-23 20:20:26,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:20:26,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204826311] [2019-11-23 20:20:26,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902109717] [2019-11-23 20:20:26,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:20:26,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:26,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-23 20:20:26,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312356108] [2019-11-23 20:20:26,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:20:26,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:20:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:26,967 INFO L87 Difference]: Start difference. First operand 193 states and 256 transitions. Second operand 18 states. [2019-11-23 20:20:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:27,880 INFO L93 Difference]: Finished difference Result 489 states and 652 transitions. [2019-11-23 20:20:27,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:20:27,880 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2019-11-23 20:20:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:27,883 INFO L225 Difference]: With dead ends: 489 [2019-11-23 20:20:27,883 INFO L226 Difference]: Without dead ends: 311 [2019-11-23 20:20:27,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=923, Invalid=1833, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:20:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-11-23 20:20:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 250. [2019-11-23 20:20:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-11-23 20:20:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 333 transitions. [2019-11-23 20:20:27,895 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 333 transitions. Word has length 46 [2019-11-23 20:20:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:27,896 INFO L462 AbstractCegarLoop]: Abstraction has 250 states and 333 transitions. [2019-11-23 20:20:27,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:20:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 333 transitions. [2019-11-23 20:20:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:20:27,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:27,897 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,101 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash -411857219, now seen corresponding path program 2 times [2019-11-23 20:20:28,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103618299] [2019-11-23 20:20:28,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:20:28,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103618299] [2019-11-23 20:20:28,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083815537] [2019-11-23 20:20:28,231 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:28,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:28,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:28,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:20:28,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:28,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-11-23 20:20:28,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372691240] [2019-11-23 20:20:28,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:28,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:28,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:28,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:28,373 INFO L87 Difference]: Start difference. First operand 250 states and 333 transitions. Second operand 20 states. [2019-11-23 20:20:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:29,428 INFO L93 Difference]: Finished difference Result 595 states and 789 transitions. [2019-11-23 20:20:29,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:20:29,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2019-11-23 20:20:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:29,432 INFO L225 Difference]: With dead ends: 595 [2019-11-23 20:20:29,432 INFO L226 Difference]: Without dead ends: 362 [2019-11-23 20:20:29,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1346, Invalid=2686, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:20:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-11-23 20:20:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 295. [2019-11-23 20:20:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-11-23 20:20:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 394 transitions. [2019-11-23 20:20:29,443 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 394 transitions. Word has length 51 [2019-11-23 20:20:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:29,444 INFO L462 AbstractCegarLoop]: Abstraction has 295 states and 394 transitions. [2019-11-23 20:20:29,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 394 transitions. [2019-11-23 20:20:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:20:29,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:29,445 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:29,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,649 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 918709513, now seen corresponding path program 3 times [2019-11-23 20:20:29,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:29,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777245748] [2019-11-23 20:20:29,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:20:29,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777245748] [2019-11-23 20:20:29,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722674831] [2019-11-23 20:20:29,781 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:20:29,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:29,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:29,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:20:29,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:29,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-11-23 20:20:29,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551766281] [2019-11-23 20:20:29,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:20:29,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:20:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:20:30,000 INFO L87 Difference]: Start difference. First operand 295 states and 394 transitions. Second operand 22 states. [2019-11-23 20:20:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,695 INFO L93 Difference]: Finished difference Result 692 states and 919 transitions. [2019-11-23 20:20:31,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-23 20:20:31,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2019-11-23 20:20:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,699 INFO L225 Difference]: With dead ends: 692 [2019-11-23 20:20:31,699 INFO L226 Difference]: Without dead ends: 416 [2019-11-23 20:20:31,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1899, Invalid=3801, Unknown=0, NotChecked=0, Total=5700 [2019-11-23 20:20:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2019-11-23 20:20:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 343. [2019-11-23 20:20:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-23 20:20:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 459 transitions. [2019-11-23 20:20:31,715 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 459 transitions. Word has length 56 [2019-11-23 20:20:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,715 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 459 transitions. [2019-11-23 20:20:31,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:20:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 459 transitions. [2019-11-23 20:20:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:20:31,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,716 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,922 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1215774073, now seen corresponding path program 4 times [2019-11-23 20:20:31,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776746687] [2019-11-23 20:20:31,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:20:32,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776746687] [2019-11-23 20:20:32,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614717175] [2019-11-23 20:20:32,061 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,109 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:32,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:32,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:20:32,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:32,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2019-11-23 20:20:32,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023076155] [2019-11-23 20:20:32,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:20:32,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:20:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:32,239 INFO L87 Difference]: Start difference. First operand 343 states and 459 transitions. Second operand 24 states. [2019-11-23 20:20:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,066 INFO L93 Difference]: Finished difference Result 795 states and 1057 transitions. [2019-11-23 20:20:34,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-11-23 20:20:34,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2019-11-23 20:20:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,070 INFO L225 Difference]: With dead ends: 795 [2019-11-23 20:20:34,071 INFO L226 Difference]: Without dead ends: 473 [2019-11-23 20:20:34,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2606, Invalid=5226, Unknown=0, NotChecked=0, Total=7832 [2019-11-23 20:20:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2019-11-23 20:20:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 394. [2019-11-23 20:20:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2019-11-23 20:20:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 528 transitions. [2019-11-23 20:20:34,087 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 528 transitions. Word has length 61 [2019-11-23 20:20:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,087 INFO L462 AbstractCegarLoop]: Abstraction has 394 states and 528 transitions. [2019-11-23 20:20:34,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:20:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 528 transitions. [2019-11-23 20:20:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:20:34,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,088 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,291 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1494388147, now seen corresponding path program 5 times [2019-11-23 20:20:34,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126102221] [2019-11-23 20:20:34,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:20:34,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126102221] [2019-11-23 20:20:34,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530391021] [2019-11-23 20:20:34,432 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:20:34,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:34,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:20:34,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-11-23 20:20:34,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313894897] [2019-11-23 20:20:34,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:20:34,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:20:34,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:20:34,785 INFO L87 Difference]: Start difference. First operand 394 states and 528 transitions. Second operand 26 states. [2019-11-23 20:20:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:37,093 INFO L93 Difference]: Finished difference Result 904 states and 1203 transitions. [2019-11-23 20:20:37,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-11-23 20:20:37,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2019-11-23 20:20:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:37,097 INFO L225 Difference]: With dead ends: 904 [2019-11-23 20:20:37,098 INFO L226 Difference]: Without dead ends: 533 [2019-11-23 20:20:37,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3047 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3493, Invalid=7013, Unknown=0, NotChecked=0, Total=10506 [2019-11-23 20:20:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2019-11-23 20:20:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 448. [2019-11-23 20:20:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2019-11-23 20:20:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 601 transitions. [2019-11-23 20:20:37,137 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 601 transitions. Word has length 66 [2019-11-23 20:20:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:37,137 INFO L462 AbstractCegarLoop]: Abstraction has 448 states and 601 transitions. [2019-11-23 20:20:37,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:20:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 601 transitions. [2019-11-23 20:20:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:20:37,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:37,163 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:37,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,374 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:37,375 INFO L82 PathProgramCache]: Analyzing trace with hash -327457739, now seen corresponding path program 6 times [2019-11-23 20:20:37,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:37,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603324534] [2019-11-23 20:20:37,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:20:37,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603324534] [2019-11-23 20:20:37,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100829617] [2019-11-23 20:20:37,535 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,909 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:20:37,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:37,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:20:37,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 21 proven. 210 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:20:37,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 20 [2019-11-23 20:20:37,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788790454] [2019-11-23 20:20:37,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:37,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:37,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:37,988 INFO L87 Difference]: Start difference. First operand 448 states and 601 transitions. Second operand 20 states. [2019-11-23 20:20:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:38,351 INFO L93 Difference]: Finished difference Result 837 states and 1131 transitions. [2019-11-23 20:20:38,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:20:38,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 71 [2019-11-23 20:20:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:38,356 INFO L225 Difference]: With dead ends: 837 [2019-11-23 20:20:38,356 INFO L226 Difference]: Without dead ends: 458 [2019-11-23 20:20:38,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=674, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:20:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-11-23 20:20:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 451. [2019-11-23 20:20:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2019-11-23 20:20:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 605 transitions. [2019-11-23 20:20:38,375 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 605 transitions. Word has length 71 [2019-11-23 20:20:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:38,377 INFO L462 AbstractCegarLoop]: Abstraction has 451 states and 605 transitions. [2019-11-23 20:20:38,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 605 transitions. [2019-11-23 20:20:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:20:38,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:38,382 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:38,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,591 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash -920732401, now seen corresponding path program 7 times [2019-11-23 20:20:38,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:38,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126108195] [2019-11-23 20:20:38,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:20:38,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126108195] [2019-11-23 20:20:38,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666688102] [2019-11-23 20:20:38,752 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:20:38,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:20:39,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:39,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2019-11-23 20:20:39,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071396767] [2019-11-23 20:20:39,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:20:39,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:20:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:20:39,042 INFO L87 Difference]: Start difference. First operand 451 states and 605 transitions. Second operand 29 states. [2019-11-23 20:20:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,274 INFO L93 Difference]: Finished difference Result 1058 states and 1420 transitions. [2019-11-23 20:20:42,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2019-11-23 20:20:42,275 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2019-11-23 20:20:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,279 INFO L225 Difference]: With dead ends: 1058 [2019-11-23 20:20:42,279 INFO L226 Difference]: Without dead ends: 632 [2019-11-23 20:20:42,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5307 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5602, Invalid=11428, Unknown=0, NotChecked=0, Total=17030 [2019-11-23 20:20:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-23 20:20:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 541. [2019-11-23 20:20:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-23 20:20:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 726 transitions. [2019-11-23 20:20:42,317 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 726 transitions. Word has length 74 [2019-11-23 20:20:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,317 INFO L462 AbstractCegarLoop]: Abstraction has 541 states and 726 transitions. [2019-11-23 20:20:42,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:20:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 726 transitions. [2019-11-23 20:20:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:20:42,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,318 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:42,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:42,521 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1106046003, now seen corresponding path program 8 times [2019-11-23 20:20:42,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:42,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530631491] [2019-11-23 20:20:42,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:20:42,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530631491] [2019-11-23 20:20:42,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817697486] [2019-11-23 20:20:42,717 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:42,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:42,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:42,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:20:42,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:20:42,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:42,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-11-23 20:20:42,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889644293] [2019-11-23 20:20:42,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:20:42,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:20:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:20:42,961 INFO L87 Difference]: Start difference. First operand 541 states and 726 transitions. Second operand 31 states. [2019-11-23 20:20:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:46,904 INFO L93 Difference]: Finished difference Result 1215 states and 1620 transitions. [2019-11-23 20:20:46,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2019-11-23 20:20:46,905 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2019-11-23 20:20:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:46,909 INFO L225 Difference]: With dead ends: 1215 [2019-11-23 20:20:46,909 INFO L226 Difference]: Without dead ends: 701 [2019-11-23 20:20:46,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6968 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7160, Invalid=14596, Unknown=0, NotChecked=0, Total=21756 [2019-11-23 20:20:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2019-11-23 20:20:46,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 604. [2019-11-23 20:20:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-11-23 20:20:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 811 transitions. [2019-11-23 20:20:46,930 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 811 transitions. Word has length 79 [2019-11-23 20:20:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:46,930 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 811 transitions. [2019-11-23 20:20:46,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:20:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 811 transitions. [2019-11-23 20:20:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:20:46,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:46,932 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:47,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:47,136 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -420277037, now seen corresponding path program 9 times [2019-11-23 20:20:47,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:47,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032863383] [2019-11-23 20:20:47,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:20:47,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032863383] [2019-11-23 20:20:47,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030565787] [2019-11-23 20:20:47,345 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:47,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-11-23 20:20:47,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:47,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:20:47,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:20:47,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:47,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2019-11-23 20:20:47,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581343486] [2019-11-23 20:20:47,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:20:47,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:47,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:20:47,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:20:47,829 INFO L87 Difference]: Start difference. First operand 604 states and 811 transitions. Second operand 33 states. [2019-11-23 20:20:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:52,812 INFO L93 Difference]: Finished difference Result 1348 states and 1798 transitions. [2019-11-23 20:20:52,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2019-11-23 20:20:52,813 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 84 [2019-11-23 20:20:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:52,817 INFO L225 Difference]: With dead ends: 1348 [2019-11-23 20:20:52,818 INFO L226 Difference]: Without dead ends: 773 [2019-11-23 20:20:52,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8988 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9019, Invalid=18371, Unknown=0, NotChecked=0, Total=27390 [2019-11-23 20:20:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2019-11-23 20:20:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 670. [2019-11-23 20:20:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-11-23 20:20:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 900 transitions. [2019-11-23 20:20:52,863 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 900 transitions. Word has length 84 [2019-11-23 20:20:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:52,863 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 900 transitions. [2019-11-23 20:20:52,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:20:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 900 transitions. [2019-11-23 20:20:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:20:52,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:52,864 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:53,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:53,077 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1687152529, now seen corresponding path program 10 times [2019-11-23 20:20:53,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:53,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266043406] [2019-11-23 20:20:53,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:20:53,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266043406] [2019-11-23 20:20:53,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945397278] [2019-11-23 20:20:53,264 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:53,337 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:53,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:53,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:20:53,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:20:53,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:53,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2019-11-23 20:20:53,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53729562] [2019-11-23 20:20:53,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:20:53,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:53,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:20:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:20:53,552 INFO L87 Difference]: Start difference. First operand 670 states and 900 transitions. Second operand 35 states. [2019-11-23 20:20:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:59,504 INFO L93 Difference]: Finished difference Result 1487 states and 1984 transitions. [2019-11-23 20:20:59,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2019-11-23 20:20:59,505 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 89 [2019-11-23 20:20:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:59,509 INFO L225 Difference]: With dead ends: 1487 [2019-11-23 20:20:59,509 INFO L226 Difference]: Without dead ends: 848 [2019-11-23 20:20:59,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11415 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=11215, Invalid=22825, Unknown=0, NotChecked=0, Total=34040 [2019-11-23 20:20:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2019-11-23 20:20:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 739. [2019-11-23 20:20:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2019-11-23 20:20:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 993 transitions. [2019-11-23 20:20:59,533 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 993 transitions. Word has length 89 [2019-11-23 20:20:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:59,533 INFO L462 AbstractCegarLoop]: Abstraction has 739 states and 993 transitions. [2019-11-23 20:20:59,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:20:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 993 transitions. [2019-11-23 20:20:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 20:20:59,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:59,534 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:59,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:59,738 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:59,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1521775767, now seen corresponding path program 11 times [2019-11-23 20:20:59,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:59,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058398675] [2019-11-23 20:20:59,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:20:59,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058398675] [2019-11-23 20:20:59,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773419432] [2019-11-23 20:20:59,956 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:00,286 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:21:00,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:00,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:21:00,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:21:00,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:00,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2019-11-23 20:21:00,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003120359] [2019-11-23 20:21:00,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:21:00,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:00,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:21:00,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:21:00,521 INFO L87 Difference]: Start difference. First operand 739 states and 993 transitions. Second operand 37 states. [2019-11-23 20:21:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:07,780 INFO L93 Difference]: Finished difference Result 1632 states and 2178 transitions. [2019-11-23 20:21:07,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2019-11-23 20:21:07,783 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 94 [2019-11-23 20:21:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:07,787 INFO L225 Difference]: With dead ends: 1632 [2019-11-23 20:21:07,787 INFO L226 Difference]: Without dead ends: 926 [2019-11-23 20:21:07,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14300 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=13786, Invalid=28034, Unknown=0, NotChecked=0, Total=41820 [2019-11-23 20:21:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2019-11-23 20:21:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 811. [2019-11-23 20:21:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2019-11-23 20:21:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1090 transitions. [2019-11-23 20:21:07,815 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1090 transitions. Word has length 94 [2019-11-23 20:21:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:07,815 INFO L462 AbstractCegarLoop]: Abstraction has 811 states and 1090 transitions. [2019-11-23 20:21:07,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:21:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1090 transitions. [2019-11-23 20:21:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:21:07,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:07,816 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:08,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:08,021 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1381098325, now seen corresponding path program 12 times [2019-11-23 20:21:08,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:08,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936974329] [2019-11-23 20:21:08,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:21:08,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936974329] [2019-11-23 20:21:08,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360966336] [2019-11-23 20:21:08,278 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:08,940 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:21:08,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:08,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:21:08,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 20:21:09,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:09,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2019-11-23 20:21:09,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263698933] [2019-11-23 20:21:09,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:21:09,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:21:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:21:09,212 INFO L87 Difference]: Start difference. First operand 811 states and 1090 transitions. Second operand 39 states. [2019-11-23 20:21:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:17,935 INFO L93 Difference]: Finished difference Result 1783 states and 2380 transitions. [2019-11-23 20:21:17,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2019-11-23 20:21:17,940 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 99 [2019-11-23 20:21:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:17,944 INFO L225 Difference]: With dead ends: 1783 [2019-11-23 20:21:17,944 INFO L226 Difference]: Without dead ends: 1007 [2019-11-23 20:21:17,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17697 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=16772, Invalid=34078, Unknown=0, NotChecked=0, Total=50850 [2019-11-23 20:21:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2019-11-23 20:21:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 886. [2019-11-23 20:21:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-11-23 20:21:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1191 transitions. [2019-11-23 20:21:17,974 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1191 transitions. Word has length 99 [2019-11-23 20:21:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:17,974 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1191 transitions. [2019-11-23 20:21:17,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:21:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1191 transitions. [2019-11-23 20:21:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:21:17,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:17,976 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:18,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:18,182 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash 194190427, now seen corresponding path program 13 times [2019-11-23 20:21:18,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:18,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641104912] [2019-11-23 20:21:18,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:21:18,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641104912] [2019-11-23 20:21:18,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045708489] [2019-11-23 20:21:18,449 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:18,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:21:18,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:21:18,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:18,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2019-11-23 20:21:18,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866537540] [2019-11-23 20:21:18,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:21:18,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:21:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:21:18,858 INFO L87 Difference]: Start difference. First operand 886 states and 1191 transitions. Second operand 41 states. [2019-11-23 20:21:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:29,141 INFO L93 Difference]: Finished difference Result 1940 states and 2590 transitions. [2019-11-23 20:21:29,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2019-11-23 20:21:29,146 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 104 [2019-11-23 20:21:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:29,150 INFO L225 Difference]: With dead ends: 1940 [2019-11-23 20:21:29,150 INFO L226 Difference]: Without dead ends: 1091 [2019-11-23 20:21:29,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21663 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=20215, Invalid=41041, Unknown=0, NotChecked=0, Total=61256 [2019-11-23 20:21:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2019-11-23 20:21:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 964. [2019-11-23 20:21:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2019-11-23 20:21:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1296 transitions. [2019-11-23 20:21:29,181 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1296 transitions. Word has length 104 [2019-11-23 20:21:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:29,181 INFO L462 AbstractCegarLoop]: Abstraction has 964 states and 1296 transitions. [2019-11-23 20:21:29,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:21:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1296 transitions. [2019-11-23 20:21:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:21:29,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:29,183 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:29,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:29,386 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash -537478937, now seen corresponding path program 14 times [2019-11-23 20:21:29,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:29,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629116975] [2019-11-23 20:21:29,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:21:29,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629116975] [2019-11-23 20:21:29,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378895377] [2019-11-23 20:21:29,661 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:29,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:29,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:29,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:21:29,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:21:30,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:30,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2019-11-23 20:21:30,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754335348] [2019-11-23 20:21:30,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:21:30,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:21:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:21:30,049 INFO L87 Difference]: Start difference. First operand 964 states and 1296 transitions. Second operand 43 states. [2019-11-23 20:21:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:42,280 INFO L93 Difference]: Finished difference Result 2103 states and 2808 transitions. [2019-11-23 20:21:42,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2019-11-23 20:21:42,280 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 109 [2019-11-23 20:21:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:42,285 INFO L225 Difference]: With dead ends: 2103 [2019-11-23 20:21:42,285 INFO L226 Difference]: Without dead ends: 1178 [2019-11-23 20:21:42,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26258 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=24159, Invalid=49011, Unknown=0, NotChecked=0, Total=73170 [2019-11-23 20:21:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2019-11-23 20:21:42,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1045. [2019-11-23 20:21:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1045 states. [2019-11-23 20:21:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1405 transitions. [2019-11-23 20:21:42,319 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1405 transitions. Word has length 109 [2019-11-23 20:21:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:42,320 INFO L462 AbstractCegarLoop]: Abstraction has 1045 states and 1405 transitions. [2019-11-23 20:21:42,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:21:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1405 transitions. [2019-11-23 20:21:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-23 20:21:42,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:42,321 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:42,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:42,524 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:42,525 INFO L82 PathProgramCache]: Analyzing trace with hash 348081183, now seen corresponding path program 15 times [2019-11-23 20:21:42,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:42,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766163172] [2019-11-23 20:21:42,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-23 20:21:42,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766163172] [2019-11-23 20:21:42,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37624421] [2019-11-23 20:21:42,866 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:43,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-11-23 20:21:43,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:43,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:21:43,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:21:44,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:44,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2019-11-23 20:21:44,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351554550] [2019-11-23 20:21:44,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:21:44,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:21:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:21:44,083 INFO L87 Difference]: Start difference. First operand 1045 states and 1405 transitions. Second operand 45 states.