/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_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:20:22,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:20:22,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:20:22,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:20:22,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:20:22,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:20:22,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:20:22,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:20:22,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:20:22,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:20:22,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:20:22,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:20:22,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:20:22,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:20:22,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:20:22,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:20:22,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:20:22,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:20:22,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:20:22,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:20:22,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:20:22,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:20:22,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:20:22,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:20:22,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:20:22,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:20:22,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:20:22,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:20:22,301 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 20:20:22,336 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:20:22,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:20:22,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:20:22,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:20:22,339 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:20:22,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:20:22,339 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:20:22,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:20:22,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:20:22,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:20:22,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:20:22,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:20:22,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:20:22,340 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:20:22,340 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:20:22,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:20:22,343 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:20:22,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:20:22,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:20:22,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:20:22,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:20:22,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:20:22,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:22,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:20:22,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:20:22,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:20:22,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:20:22,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:20:22,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:20:22,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:20:22,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:20:22,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:20:22,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:20:22,659 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:20:22,660 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:20:22,661 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-11-23 20:20:22,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/242161446/cdfdff49b6bc4783bec6a2d5a65a9c72/FLAG2a00c86a2 [2019-11-23 20:20:23,207 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:20:23,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-11-23 20:20:23,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/242161446/cdfdff49b6bc4783bec6a2d5a65a9c72/FLAG2a00c86a2 [2019-11-23 20:20:23,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/242161446/cdfdff49b6bc4783bec6a2d5a65a9c72 [2019-11-23 20:20:23,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:20:23,587 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:20:23,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:23,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:20:23,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:20:23,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:23,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69786360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23, skipping insertion in model container [2019-11-23 20:20:23,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:23,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:20:23,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:20:23,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:23,829 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:20:23,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:23,872 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:20:23,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23 WrapperNode [2019-11-23 20:20:23,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:23,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:23,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:20:23,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:20:23,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:23,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:24,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:20:24,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:20:24,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:20:24,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (1/1) ... [2019-11-23 20:20:24,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:20:24,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:20:24,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:20:24,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:20:24,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (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 20:20:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:20:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:20:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:20:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:20:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:20:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:20:24,430 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:20:24,430 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-23 20:20:24,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:24 BoogieIcfgContainer [2019-11-23 20:20:24,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:20:24,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:20:24,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:20:24,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:20:24,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:20:23" (1/3) ... [2019-11-23 20:20:24,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4323645c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:24, skipping insertion in model container [2019-11-23 20:20:24,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:23" (2/3) ... [2019-11-23 20:20:24,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4323645c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:24, skipping insertion in model container [2019-11-23 20:20:24,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:24" (3/3) ... [2019-11-23 20:20:24,440 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2019-11-23 20:20:24,451 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:20:24,458 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 20:20:24,471 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 20:20:24,497 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:20:24,498 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:20:24,498 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:20:24,498 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:20:24,498 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:20:24,498 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:20:24,498 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:20:24,499 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:20:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-23 20:20:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:24,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:24,524 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:24,525 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:24,531 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2019-11-23 20:20:24,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:24,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158821474] [2019-11-23 20:20:24,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:24,660 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 20:20:24,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158821474] [2019-11-23 20:20:24,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:24,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:20:24,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986053195] [2019-11-23 20:20:24,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:20:24,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:24,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:20:24,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:24,687 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-23 20:20:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:24,712 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2019-11-23 20:20:24,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:20:24,714 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:20:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:24,728 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:20:24,729 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:20:24,737 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 20:20:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:20:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:20:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:20:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:20:24,798 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2019-11-23 20:20:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:24,799 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:20:24,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:20:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:20:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:24,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:24,802 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:24,803 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2019-11-23 20:20:24,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:24,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442977566] [2019-11-23 20:20:24,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:24,904 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 20:20:24,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442977566] [2019-11-23 20:20:24,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:24,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:24,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150985502] [2019-11-23 20:20:24,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:24,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:24,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:24,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:24,910 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2019-11-23 20:20:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:24,959 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2019-11-23 20:20:24,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:24,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:20:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:24,962 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:20:24,962 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:20:24,965 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 20:20:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:20:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 20:20:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:20:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-11-23 20:20:24,980 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 10 [2019-11-23 20:20:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:24,981 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-11-23 20:20:24,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-11-23 20:20:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:20:24,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:24,984 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:24,984 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1369117107, now seen corresponding path program 1 times [2019-11-23 20:20:24,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:24,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602066213] [2019-11-23 20:20:24,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,080 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 20:20:25,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602066213] [2019-11-23 20:20:25,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:25,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:25,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238347278] [2019-11-23 20:20:25,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:25,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:25,086 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 3 states. [2019-11-23 20:20:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,175 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-23 20:20:25,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:25,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:20:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,179 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:20:25,179 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:20:25,180 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 20:20:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:20:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2019-11-23 20:20:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:20:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-11-23 20:20:25,194 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 12 [2019-11-23 20:20:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,194 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-11-23 20:20:25,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-11-23 20:20:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:25,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:25,203 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2019-11-23 20:20:25,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:25,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191018957] [2019-11-23 20:20:25,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:25,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191018957] [2019-11-23 20:20:25,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439105780] [2019-11-23 20:20:25,271 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 20:20:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:25,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:25,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:25,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:20:25,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267711554] [2019-11-23 20:20:25,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:20:25,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:20:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:25,396 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 5 states. [2019-11-23 20:20:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,439 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2019-11-23 20:20:25,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:25,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:20:25,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,440 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:20:25,441 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:20:25,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:20:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:20:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:20:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-11-23 20:20:25,448 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2019-11-23 20:20:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,449 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-11-23 20:20:25,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:20:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-11-23 20:20:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:20:25,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,450 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:25,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:25,660 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:25,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1270281666, now seen corresponding path program 2 times [2019-11-23 20:20:25,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:25,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019656166] [2019-11-23 20:20:25,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:25,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019656166] [2019-11-23 20:20:25,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044491500] [2019-11-23 20:20:25,734 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 20:20:25,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:20:25,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:25,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:25,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:20:25,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:25,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-23 20:20:25,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205767034] [2019-11-23 20:20:25,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:25,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:25,821 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 4 states. [2019-11-23 20:20:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,941 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2019-11-23 20:20:25,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:25,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-23 20:20:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,945 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:20:25,945 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:20:25,946 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:20:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2019-11-23 20:20:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:20:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2019-11-23 20:20:25,952 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 16 [2019-11-23 20:20:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,953 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2019-11-23 20:20:25,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:25,953 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2019-11-23 20:20:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:20:25,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,954 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,158 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2019-11-23 20:20:26,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716303497] [2019-11-23 20:20:26,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:20:26,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716303497] [2019-11-23 20:20:26,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597904300] [2019-11-23 20:20:26,221 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 20:20:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:26,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:26,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-11-23 20:20:26,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118947826] [2019-11-23 20:20:26,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:20:26,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:20:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:26,319 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 7 states. [2019-11-23 20:20:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,435 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2019-11-23 20:20:26,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:26,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-23 20:20:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,439 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:20:26,439 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:20:26,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:20:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2019-11-23 20:20:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:20:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-11-23 20:20:26,453 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 19 [2019-11-23 20:20:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,453 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-11-23 20:20:26,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:20:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-11-23 20:20:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:20:26,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,455 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,667 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1406890192, now seen corresponding path program 1 times [2019-11-23 20:20:26,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823904227] [2019-11-23 20:20:26,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:26,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823904227] [2019-11-23 20:20:26,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219950794] [2019-11-23 20:20:26,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:26,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:26,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:20:26,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611893169] [2019-11-23 20:20:26,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:20:26,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:20:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:26,789 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 7 states. [2019-11-23 20:20:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,811 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2019-11-23 20:20:26,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:20:26,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-23 20:20:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,813 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:20:26,813 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:20:26,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:20:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 20:20:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:20:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2019-11-23 20:20:26,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 21 [2019-11-23 20:20:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,820 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2019-11-23 20:20:26,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:20:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2019-11-23 20:20:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:20:26,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,822 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:27,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,033 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1622061326, now seen corresponding path program 2 times [2019-11-23 20:20:27,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:27,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826087908] [2019-11-23 20:20:27,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:27,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826087908] [2019-11-23 20:20:27,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232785000] [2019-11-23 20:20:27,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:20:27,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:27,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:27,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:20:27,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:27,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-11-23 20:20:27,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703023868] [2019-11-23 20:20:27,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:27,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:27,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:20:27,206 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 4 states. [2019-11-23 20:20:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:27,252 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2019-11-23 20:20:27,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:27,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 20:20:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:27,253 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:20:27,253 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:20:27,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:20:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:20:27,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-11-23 20:20:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:20:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2019-11-23 20:20:27,261 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 23 [2019-11-23 20:20:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:27,262 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2019-11-23 20:20:27,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2019-11-23 20:20:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:20:27,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:27,263 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:27,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,473 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1256932737, now seen corresponding path program 1 times [2019-11-23 20:20:27,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:27,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581110868] [2019-11-23 20:20:27,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:27,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581110868] [2019-11-23 20:20:27,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521901038] [2019-11-23 20:20:27,566 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 20:20:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:27,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:27,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:27,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:20:27,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489937994] [2019-11-23 20:20:27,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:27,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:27,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:27,637 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 8 states. [2019-11-23 20:20:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:27,670 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2019-11-23 20:20:27,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:27,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-23 20:20:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:27,671 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:20:27,672 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:20:27,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:20:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-23 20:20:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:20:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-11-23 20:20:27,680 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 24 [2019-11-23 20:20:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:27,680 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-11-23 20:20:27,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-11-23 20:20:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:20:27,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:27,682 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:27,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,887 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash 815114625, now seen corresponding path program 2 times [2019-11-23 20:20:27,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:27,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181876796] [2019-11-23 20:20:27,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:27,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181876796] [2019-11-23 20:20:27,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962067111] [2019-11-23 20:20:27,960 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 20:20:28,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:20:28,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:28,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:20:28,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:28,122 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:20:28,123 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 59 [2019-11-23 20:20:28,123 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:20:28,137 INFO L567 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2019-11-23 20:20:28,138 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:20:28,138 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:7 [2019-11-23 20:20:28,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:20:28,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:28,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2019-11-23 20:20:28,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856945398] [2019-11-23 20:20:28,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:20:28,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:28,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:20:28,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:28,175 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 6 states. [2019-11-23 20:20:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:28,307 INFO L93 Difference]: Finished difference Result 130 states and 170 transitions. [2019-11-23 20:20:28,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:20:28,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-23 20:20:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:28,308 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:20:28,309 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:20:28,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:20:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2019-11-23 20:20:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:20:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2019-11-23 20:20:28,319 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 26 [2019-11-23 20:20:28,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:28,320 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2019-11-23 20:20:28,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:20:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2019-11-23 20:20:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:20:28,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:28,321 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,535 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1001637431, now seen corresponding path program 1 times [2019-11-23 20:20:28,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309422774] [2019-11-23 20:20:28,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:20:28,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309422774] [2019-11-23 20:20:28,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224312493] [2019-11-23 20:20:28,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:20:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:28,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:20:28,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:28,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:20:28,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861336083] [2019-11-23 20:20:28,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:20:28,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:28,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:20:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:20:28,675 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 9 states. [2019-11-23 20:20:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:28,723 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2019-11-23 20:20:28,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:20:28,724 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-11-23 20:20:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:28,724 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:20:28,725 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:20:28,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:20:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:20:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:20:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:20:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2019-11-23 20:20:28,735 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 30 [2019-11-23 20:20:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:28,735 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2019-11-23 20:20:28,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:20:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2019-11-23 20:20:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:20:28,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:28,737 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,948 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1917971385, now seen corresponding path program 2 times [2019-11-23 20:20:28,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657375139] [2019-11-23 20:20:28,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:20:29,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657375139] [2019-11-23 20:20:29,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188855014] [2019-11-23 20:20:29,032 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 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 20:20:29,076 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:29,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:29,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:29,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:20:29,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:29,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:20:29,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57495616] [2019-11-23 20:20:29,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:20:29,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:29,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:20:29,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:20:29,104 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 10 states. [2019-11-23 20:20:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:29,137 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2019-11-23 20:20:29,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:20:29,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-11-23 20:20:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:29,138 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:20:29,138 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:20:29,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:20:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:20:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-23 20:20:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:20:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2019-11-23 20:20:29,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2019-11-23 20:20:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:29,146 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2019-11-23 20:20:29,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:20:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2019-11-23 20:20:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:20:29,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:29,147 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:29,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,358 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:29,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2046605499, now seen corresponding path program 3 times [2019-11-23 20:20:29,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:29,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066855304] [2019-11-23 20:20:29,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:20:29,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066855304] [2019-11-23 20:20:29,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881485454] [2019-11-23 20:20:29,449 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 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 20:20:29,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:20:29,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:29,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:29,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:29,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:29,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-11-23 20:20:29,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720049568] [2019-11-23 20:20:29,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:20:29,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:29,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:20:29,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:29,542 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 13 states. [2019-11-23 20:20:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:29,732 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2019-11-23 20:20:29,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:20:29,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-11-23 20:20:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:29,733 INFO L225 Difference]: With dead ends: 138 [2019-11-23 20:20:29,733 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:20:29,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:20:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2019-11-23 20:20:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:20:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-11-23 20:20:29,740 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 34 [2019-11-23 20:20:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:29,741 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-11-23 20:20:29,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:20:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-11-23 20:20:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:20:29,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:29,742 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:29,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,946 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 5284659, now seen corresponding path program 4 times [2019-11-23 20:20:29,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:29,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946720160] [2019-11-23 20:20:29,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:20:30,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946720160] [2019-11-23 20:20:30,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771404108] [2019-11-23 20:20:30,058 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 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 20:20:30,108 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:30,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:30,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:30,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:20:30,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:30,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:20:30,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673171084] [2019-11-23 20:20:30,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:30,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:30,135 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 12 states. [2019-11-23 20:20:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:30,185 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-11-23 20:20:30,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:30,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-11-23 20:20:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:30,187 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:20:30,187 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:20:30,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:20:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-23 20:20:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:20:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2019-11-23 20:20:30,193 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 39 [2019-11-23 20:20:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:30,193 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2019-11-23 20:20:30,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2019-11-23 20:20:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:20:30,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,195 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:30,399 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,400 INFO L82 PathProgramCache]: Analyzing trace with hash 102207473, now seen corresponding path program 5 times [2019-11-23 20:20:30,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436991343] [2019-11-23 20:20:30,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:20:30,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436991343] [2019-11-23 20:20:30,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877874028] [2019-11-23 20:20:30,534 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 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 20:20:30,611 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:20:30,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:30,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:20:30,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:20:30,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:30,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:20:30,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021263458] [2019-11-23 20:20:30,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:20:30,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:20:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:30,664 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2019-11-23 20:20:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:30,702 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2019-11-23 20:20:30,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:20:30,703 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2019-11-23 20:20:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:30,703 INFO L225 Difference]: With dead ends: 136 [2019-11-23 20:20:30,704 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:20:30,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:20:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-23 20:20:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:20:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2019-11-23 20:20:30,710 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 41 [2019-11-23 20:20:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:30,710 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2019-11-23 20:20:30,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:20:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2019-11-23 20:20:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:20:30,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,711 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:30,915 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1244248785, now seen corresponding path program 6 times [2019-11-23 20:20:30,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980483232] [2019-11-23 20:20:30,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:20:31,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980483232] [2019-11-23 20:20:31,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025831492] [2019-11-23 20:20:31,041 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 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 20:20:31,085 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:20:31,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:31,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:31,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 20:20:31,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:31,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-11-23 20:20:31,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960936442] [2019-11-23 20:20:31,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:31,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:31,134 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 17 states. [2019-11-23 20:20:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,496 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2019-11-23 20:20:31,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:31,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2019-11-23 20:20:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,498 INFO L225 Difference]: With dead ends: 155 [2019-11-23 20:20:31,498 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:20:31,499 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:20:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:20:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2019-11-23 20:20:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:20:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2019-11-23 20:20:31,505 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 43 [2019-11-23 20:20:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,505 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2019-11-23 20:20:31,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2019-11-23 20:20:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:20:31,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,506 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,710 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2144325757, now seen corresponding path program 7 times [2019-11-23 20:20:31,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867050271] [2019-11-23 20:20:31,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:31,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867050271] [2019-11-23 20:20:31,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787341966] [2019-11-23 20:20:31,845 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 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 20:20:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:20:31,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:31,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:31,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:20:31,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795889080] [2019-11-23 20:20:31,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:20:31,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:20:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:31,948 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 15 states. [2019-11-23 20:20:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,993 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2019-11-23 20:20:31,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:20:31,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2019-11-23 20:20:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,995 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:20:31,995 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 20:20:31,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 20:20:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-23 20:20:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:20:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2019-11-23 20:20:32,001 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 48 [2019-11-23 20:20:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,001 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2019-11-23 20:20:32,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:20:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2019-11-23 20:20:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:20:32,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,002 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,206 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1678460795, now seen corresponding path program 8 times [2019-11-23 20:20:32,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280160127] [2019-11-23 20:20:32,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:32,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280160127] [2019-11-23 20:20:32,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633112418] [2019-11-23 20:20:32,381 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 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 20:20:32,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:32,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:32,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:32,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:32,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:20:32,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454025777] [2019-11-23 20:20:32,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:20:32,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:20:32,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:20:32,470 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 16 states. [2019-11-23 20:20:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,521 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2019-11-23 20:20:32,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:20:32,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-11-23 20:20:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,522 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:20:32,523 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:20:32,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:20:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:20:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-23 20:20:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 20:20:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2019-11-23 20:20:32,528 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 50 [2019-11-23 20:20:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,529 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2019-11-23 20:20:32,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:20:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2019-11-23 20:20:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:20:32,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,530 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,733 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -658831097, now seen corresponding path program 9 times [2019-11-23 20:20:32,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647678385] [2019-11-23 20:20:32,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:32,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647678385] [2019-11-23 20:20:32,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896502860] [2019-11-23 20:20:32,879 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 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 20:20:32,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:20:32,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:32,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:20:33,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:33,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2019-11-23 20:20:33,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565020795] [2019-11-23 20:20:33,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:20:33,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:20:33,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:33,024 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 21 states. [2019-11-23 20:20:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:33,460 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2019-11-23 20:20:33,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:20:33,460 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2019-11-23 20:20:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:33,461 INFO L225 Difference]: With dead ends: 173 [2019-11-23 20:20:33,461 INFO L226 Difference]: Without dead ends: 111 [2019-11-23 20:20:33,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:20:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-23 20:20:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2019-11-23 20:20:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:20:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2019-11-23 20:20:33,467 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 52 [2019-11-23 20:20:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:33,468 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2019-11-23 20:20:33,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:20:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2019-11-23 20:20:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:20:33,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,469 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:33,678 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1906471961, now seen corresponding path program 10 times [2019-11-23 20:20:33,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444172641] [2019-11-23 20:20:33,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:33,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444172641] [2019-11-23 20:20:33,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581493944] [2019-11-23 20:20:33,834 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 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 20:20:33,881 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:33,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:33,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:20:33,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:33,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:33,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:20:33,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907994488] [2019-11-23 20:20:33,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:20:33,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:20:33,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:33,898 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand 18 states. [2019-11-23 20:20:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:33,969 INFO L93 Difference]: Finished difference Result 170 states and 212 transitions. [2019-11-23 20:20:33,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:33,970 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2019-11-23 20:20:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:33,970 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:20:33,971 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:20:33,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:20:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-11-23 20:20:33,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:20:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2019-11-23 20:20:33,976 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 57 [2019-11-23 20:20:33,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:33,976 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2019-11-23 20:20:33,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:20:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2019-11-23 20:20:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:20:33,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,977 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,181 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1523186395, now seen corresponding path program 11 times [2019-11-23 20:20:34,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134139884] [2019-11-23 20:20:34,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:34,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134139884] [2019-11-23 20:20:34,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967842451] [2019-11-23 20:20:34,401 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 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 20:20:34,682 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 20:20:34,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:34,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:34,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:20:34,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590845433] [2019-11-23 20:20:34,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:20:34,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:20:34,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:20:34,703 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 19 states. [2019-11-23 20:20:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,769 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2019-11-23 20:20:34,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:20:34,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2019-11-23 20:20:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,770 INFO L225 Difference]: With dead ends: 172 [2019-11-23 20:20:34,770 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:20:34,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:20:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:20:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 20:20:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 20:20:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2019-11-23 20:20:34,775 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 59 [2019-11-23 20:20:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,776 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2019-11-23 20:20:34,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:20:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2019-11-23 20:20:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:20:34,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,777 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,982 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1742022371, now seen corresponding path program 12 times [2019-11-23 20:20:34,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594924745] [2019-11-23 20:20:34,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:35,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594924745] [2019-11-23 20:20:35,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205478858] [2019-11-23 20:20:35,181 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:20:35,329 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:20:35,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:35,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:35,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-11-23 20:20:35,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:35,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:20:35,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171985333] [2019-11-23 20:20:35,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:20:35,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:20:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:20:35,447 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 25 states. [2019-11-23 20:20:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,006 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2019-11-23 20:20:36,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:20:36,008 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2019-11-23 20:20:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,009 INFO L225 Difference]: With dead ends: 191 [2019-11-23 20:20:36,009 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:20:36,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1589, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:20:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:20:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2019-11-23 20:20:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-23 20:20:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2019-11-23 20:20:36,015 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 61 [2019-11-23 20:20:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,016 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2019-11-23 20:20:36,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:20:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2019-11-23 20:20:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:20:36,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,017 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,221 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash -352656177, now seen corresponding path program 13 times [2019-11-23 20:20:36,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055124187] [2019-11-23 20:20:36,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:36,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055124187] [2019-11-23 20:20:36,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251386253] [2019-11-23 20:20:36,428 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 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 20:20:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:36,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:36,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:36,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:20:36,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000655549] [2019-11-23 20:20:36,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:20:36,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:20:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:36,504 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 21 states. [2019-11-23 20:20:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,591 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2019-11-23 20:20:36,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:20:36,592 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2019-11-23 20:20:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,593 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:20:36,593 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:20:36,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:20:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-11-23 20:20:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 20:20:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2019-11-23 20:20:36,599 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 66 [2019-11-23 20:20:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,599 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2019-11-23 20:20:36,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:20:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2019-11-23 20:20:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:20:36,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,600 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,810 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,811 INFO L82 PathProgramCache]: Analyzing trace with hash -412880559, now seen corresponding path program 14 times [2019-11-23 20:20:36,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075129066] [2019-11-23 20:20:36,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:37,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075129066] [2019-11-23 20:20:37,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558232666] [2019-11-23 20:20:37,047 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 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 20:20:37,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:37,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:37,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:20:37,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:37,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:20:37,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327597039] [2019-11-23 20:20:37,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:20:37,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:20:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:20:37,126 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 22 states. [2019-11-23 20:20:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:37,204 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2019-11-23 20:20:37,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:20:37,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2019-11-23 20:20:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:37,205 INFO L225 Difference]: With dead ends: 190 [2019-11-23 20:20:37,205 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:20:37,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:20:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:20:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-11-23 20:20:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:20:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2019-11-23 20:20:37,211 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 68 [2019-11-23 20:20:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:37,211 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2019-11-23 20:20:37,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:20:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2019-11-23 20:20:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:20:37,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:37,212 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:37,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,417 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1841030483, now seen corresponding path program 15 times [2019-11-23 20:20:37,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:37,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843001666] [2019-11-23 20:20:37,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:37,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843001666] [2019-11-23 20:20:37,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203960411] [2019-11-23 20:20:37,661 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 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 20:20:37,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:20:37,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:37,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:37,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-11-23 20:20:37,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2019-11-23 20:20:37,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298576741] [2019-11-23 20:20:37,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:20:37,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:20:37,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:20:37,833 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 29 states. [2019-11-23 20:20:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:38,528 INFO L93 Difference]: Finished difference Result 209 states and 262 transitions. [2019-11-23 20:20:38,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:20:38,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2019-11-23 20:20:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:38,530 INFO L225 Difference]: With dead ends: 209 [2019-11-23 20:20:38,531 INFO L226 Difference]: Without dead ends: 135 [2019-11-23 20:20:38,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:20:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-23 20:20:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2019-11-23 20:20:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-23 20:20:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2019-11-23 20:20:38,538 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 70 [2019-11-23 20:20:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:38,538 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2019-11-23 20:20:38,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:20:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2019-11-23 20:20:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:20:38,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:38,539 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:38,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,743 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1189759131, now seen corresponding path program 16 times [2019-11-23 20:20:38,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:38,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454839809] [2019-11-23 20:20:38,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:38,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454839809] [2019-11-23 20:20:38,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996404344] [2019-11-23 20:20:38,994 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 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 20:20:39,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:39,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:39,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:20:39,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:39,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:39,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:20:39,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997413197] [2019-11-23 20:20:39,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:20:39,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:20:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:39,081 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand 24 states. [2019-11-23 20:20:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:39,159 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2019-11-23 20:20:39,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:20:39,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2019-11-23 20:20:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:39,162 INFO L225 Difference]: With dead ends: 206 [2019-11-23 20:20:39,162 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 20:20:39,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 20:20:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-11-23 20:20:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 20:20:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2019-11-23 20:20:39,171 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 75 [2019-11-23 20:20:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:39,172 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2019-11-23 20:20:39,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:20:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2019-11-23 20:20:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:20:39,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:39,173 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:39,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:39,377 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1355141543, now seen corresponding path program 17 times [2019-11-23 20:20:39,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:39,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393604227] [2019-11-23 20:20:39,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:39,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393604227] [2019-11-23 20:20:39,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977785269] [2019-11-23 20:20:39,796 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:40,394 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 20:20:40,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:40,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:20:40,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:40,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:40,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:20:40,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149614181] [2019-11-23 20:20:40,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:20:40,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:40,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:20:40,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:20:40,415 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand 25 states. [2019-11-23 20:20:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:40,495 INFO L93 Difference]: Finished difference Result 208 states and 258 transitions. [2019-11-23 20:20:40,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:20:40,498 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2019-11-23 20:20:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:40,499 INFO L225 Difference]: With dead ends: 208 [2019-11-23 20:20:40,499 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:20:40,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:20:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:20:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-23 20:20:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 20:20:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2019-11-23 20:20:40,505 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 77 [2019-11-23 20:20:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:40,505 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2019-11-23 20:20:40,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:20:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2019-11-23 20:20:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:20:40,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:40,506 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:40,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:40,711 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1126669463, now seen corresponding path program 18 times [2019-11-23 20:20:40,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:40,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437100585] [2019-11-23 20:20:40,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:40,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437100585] [2019-11-23 20:20:40,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079210544] [2019-11-23 20:20:40,996 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:41,224 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:20:41,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:41,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:41,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2019-11-23 20:20:41,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:41,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2019-11-23 20:20:41,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061997294] [2019-11-23 20:20:41,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:20:41,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:41,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:20:41,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:20:41,351 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 33 states. [2019-11-23 20:20:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,136 INFO L93 Difference]: Finished difference Result 227 states and 284 transitions. [2019-11-23 20:20:42,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:20:42,137 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 79 [2019-11-23 20:20:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,138 INFO L225 Difference]: With dead ends: 227 [2019-11-23 20:20:42,138 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:20:42,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1005, Invalid=2901, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:20:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:20:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2019-11-23 20:20:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-23 20:20:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 162 transitions. [2019-11-23 20:20:42,146 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 162 transitions. Word has length 79 [2019-11-23 20:20:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,146 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 162 transitions. [2019-11-23 20:20:42,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:20:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 162 transitions. [2019-11-23 20:20:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:20:42,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,147 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:42,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:42,352 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash 102213147, now seen corresponding path program 19 times [2019-11-23 20:20:42,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:42,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571679234] [2019-11-23 20:20:42,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:20:42,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571679234] [2019-11-23 20:20:42,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928377628] [2019-11-23 20:20:42,696 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:20:42,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:20:42,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:42,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:20:42,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064324504] [2019-11-23 20:20:42,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:20:42,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:20:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:20:42,781 INFO L87 Difference]: Start difference. First operand 135 states and 162 transitions. Second operand 27 states. [2019-11-23 20:20:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,862 INFO L93 Difference]: Finished difference Result 224 states and 278 transitions. [2019-11-23 20:20:42,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:20:42,868 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2019-11-23 20:20:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,869 INFO L225 Difference]: With dead ends: 224 [2019-11-23 20:20:42,869 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:20:42,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:20:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:20:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2019-11-23 20:20:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-23 20:20:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2019-11-23 20:20:42,875 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 84 [2019-11-23 20:20:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,875 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2019-11-23 20:20:42,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:20:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2019-11-23 20:20:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:20:42,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,877 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:43,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,080 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2024057315, now seen corresponding path program 20 times [2019-11-23 20:20:43,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:43,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346031869] [2019-11-23 20:20:43,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:20:43,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346031869] [2019-11-23 20:20:43,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023942786] [2019-11-23 20:20:43,489 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:43,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:43,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:20:43,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:20:43,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:43,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:20:43,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043313730] [2019-11-23 20:20:43,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:20:43,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:43,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:20:43,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:20:43,599 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand 28 states. [2019-11-23 20:20:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:43,679 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2019-11-23 20:20:43,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:20:43,680 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2019-11-23 20:20:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:43,681 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:20:43,681 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:20:43,681 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:20:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:20:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-11-23 20:20:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-23 20:20:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2019-11-23 20:20:43,686 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 86 [2019-11-23 20:20:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:43,686 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2019-11-23 20:20:43,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:20:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2019-11-23 20:20:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:20:43,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:43,687 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:43,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,891 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:43,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash -965538401, now seen corresponding path program 21 times [2019-11-23 20:20:43,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:43,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096564199] [2019-11-23 20:20:43,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:20:44,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096564199] [2019-11-23 20:20:44,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571875223] [2019-11-23 20:20:44,278 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:44,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:20:44,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:44,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:44,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2019-11-23 20:20:44,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:44,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2019-11-23 20:20:44,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273189013] [2019-11-23 20:20:44,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:20:44,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:44,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:20:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:20:44,499 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 37 states. [2019-11-23 20:20:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:45,332 INFO L93 Difference]: Finished difference Result 245 states and 306 transitions. [2019-11-23 20:20:45,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:20:45,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2019-11-23 20:20:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:45,334 INFO L225 Difference]: With dead ends: 245 [2019-11-23 20:20:45,334 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 20:20:45,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1266, Invalid=3704, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 20:20:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 20:20:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2019-11-23 20:20:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 20:20:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2019-11-23 20:20:45,341 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 88 [2019-11-23 20:20:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:45,342 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2019-11-23 20:20:45,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:20:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2019-11-23 20:20:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:20:45,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:45,343 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:45,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:45,547 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:45,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1288496817, now seen corresponding path program 22 times [2019-11-23 20:20:45,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:45,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193122035] [2019-11-23 20:20:45,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 20:20:45,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193122035] [2019-11-23 20:20:45,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885749928] [2019-11-23 20:20:45,937 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:46,009 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:46,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:46,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:20:46,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 20:20:46,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:46,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:20:46,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83994599] [2019-11-23 20:20:46,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:20:46,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:20:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:20:46,050 INFO L87 Difference]: Start difference. First operand 147 states and 176 transitions. Second operand 30 states. [2019-11-23 20:20:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:46,133 INFO L93 Difference]: Finished difference Result 242 states and 300 transitions. [2019-11-23 20:20:46,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:20:46,133 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2019-11-23 20:20:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:46,134 INFO L225 Difference]: With dead ends: 242 [2019-11-23 20:20:46,134 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:20:46,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:20:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:20:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2019-11-23 20:20:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-11-23 20:20:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2019-11-23 20:20:46,143 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 93 [2019-11-23 20:20:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:46,144 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2019-11-23 20:20:46,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:20:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2019-11-23 20:20:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:20:46,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:46,145 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:46,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:46,348 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1403538317, now seen corresponding path program 23 times [2019-11-23 20:20:46,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:46,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681326213] [2019-11-23 20:20:46,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 20:20:46,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681326213] [2019-11-23 20:20:46,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811411186] [2019-11-23 20:20:46,710 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:47,420 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-11-23 20:20:47,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:47,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:20:47,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 20:20:47,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:47,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:20:47,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584001601] [2019-11-23 20:20:47,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:20:47,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:47,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:20:47,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:20:47,442 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 31 states. [2019-11-23 20:20:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:47,539 INFO L93 Difference]: Finished difference Result 244 states and 302 transitions. [2019-11-23 20:20:47,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:20:47,540 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 95 [2019-11-23 20:20:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:47,540 INFO L225 Difference]: With dead ends: 244 [2019-11-23 20:20:47,541 INFO L226 Difference]: Without dead ends: 152 [2019-11-23 20:20:47,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:20:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-23 20:20:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2019-11-23 20:20:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-23 20:20:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2019-11-23 20:20:47,547 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 95 [2019-11-23 20:20:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:47,547 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2019-11-23 20:20:47,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:20:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2019-11-23 20:20:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:20:47,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:47,548 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:47,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:47,754 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1415977397, now seen corresponding path program 24 times [2019-11-23 20:20:47,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:47,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134305496] [2019-11-23 20:20:47,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 20:20:48,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134305496] [2019-11-23 20:20:48,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081282939] [2019-11-23 20:20:48,235 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:48,783 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:20:48,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:48,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:20:48,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2019-11-23 20:20:48,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:48,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2019-11-23 20:20:48,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9889426] [2019-11-23 20:20:48,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:20:48,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:20:48,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=1119, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:20:48,962 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand 41 states. [2019-11-23 20:20:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:50,065 INFO L93 Difference]: Finished difference Result 263 states and 328 transitions. [2019-11-23 20:20:50,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:20:50,065 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 97 [2019-11-23 20:20:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:50,067 INFO L225 Difference]: With dead ends: 263 [2019-11-23 20:20:50,067 INFO L226 Difference]: Without dead ends: 171 [2019-11-23 20:20:50,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1557, Invalid=4605, Unknown=0, NotChecked=0, Total=6162 [2019-11-23 20:20:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-11-23 20:20:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2019-11-23 20:20:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-11-23 20:20:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2019-11-23 20:20:50,075 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 97 [2019-11-23 20:20:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:50,075 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2019-11-23 20:20:50,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:20:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2019-11-23 20:20:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:20:50,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:50,076 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:50,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:50,280 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1609944217, now seen corresponding path program 25 times [2019-11-23 20:20:50,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:50,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807220570] [2019-11-23 20:20:50,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-23 20:20:50,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807220570] [2019-11-23 20:20:50,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134878496] [2019-11-23 20:20:50,709 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:50,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:20:50,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-23 20:20:50,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:50,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:20:50,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000324011] [2019-11-23 20:20:50,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:20:50,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:20:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:20:50,807 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 33 states. [2019-11-23 20:20:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:50,917 INFO L93 Difference]: Finished difference Result 260 states and 322 transitions. [2019-11-23 20:20:50,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:20:50,919 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2019-11-23 20:20:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:50,920 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:20:50,920 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:20:50,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:20:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:20:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2019-11-23 20:20:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-23 20:20:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2019-11-23 20:20:50,926 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 102 [2019-11-23 20:20:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:50,927 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2019-11-23 20:20:50,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:20:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2019-11-23 20:20:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:20:50,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:50,928 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:51,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:51,131 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 890676969, now seen corresponding path program 26 times [2019-11-23 20:20:51,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:51,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764127647] [2019-11-23 20:20:51,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-23 20:20:51,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764127647] [2019-11-23 20:20:51,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020138302] [2019-11-23 20:20:51,570 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:51,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:51,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:51,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:20:51,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-23 20:20:51,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:51,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:20:51,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450290568] [2019-11-23 20:20:51,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:20:51,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:51,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:20:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:20:51,663 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand 34 states. [2019-11-23 20:20:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:51,790 INFO L93 Difference]: Finished difference Result 262 states and 324 transitions. [2019-11-23 20:20:51,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:20:51,790 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 104 [2019-11-23 20:20:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:51,791 INFO L225 Difference]: With dead ends: 262 [2019-11-23 20:20:51,791 INFO L226 Difference]: Without dead ends: 164 [2019-11-23 20:20:51,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:20:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-23 20:20:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-11-23 20:20:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-23 20:20:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2019-11-23 20:20:51,798 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 104 [2019-11-23 20:20:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:51,798 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2019-11-23 20:20:51,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:20:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2019-11-23 20:20:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 20:20:51,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:51,799 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:52,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:52,002 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1194049045, now seen corresponding path program 27 times [2019-11-23 20:20:52,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:52,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652071921] [2019-11-23 20:20:52,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-23 20:20:52,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652071921] [2019-11-23 20:20:52,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888452227] [2019-11-23 20:20:52,476 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:52,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:20:52,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:52,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:20:52,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2019-11-23 20:20:52,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:52,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 15] total 47 [2019-11-23 20:20:52,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774679885] [2019-11-23 20:20:52,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:20:52,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:52,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:20:52,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=1465, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:20:52,821 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 47 states. [2019-11-23 20:20:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:54,203 INFO L93 Difference]: Finished difference Result 282 states and 352 transitions. [2019-11-23 20:20:54,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:20:54,203 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 106 [2019-11-23 20:20:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:54,205 INFO L225 Difference]: With dead ends: 282 [2019-11-23 20:20:54,205 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:20:54,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2105, Invalid=6085, Unknown=0, NotChecked=0, Total=8190 [2019-11-23 20:20:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:20:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 173. [2019-11-23 20:20:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-23 20:20:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2019-11-23 20:20:54,213 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 106 [2019-11-23 20:20:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:54,213 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2019-11-23 20:20:54,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:20:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2019-11-23 20:20:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:20:54,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:54,214 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:54,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:54,418 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash 629447873, now seen corresponding path program 28 times [2019-11-23 20:20:54,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:54,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897761314] [2019-11-23 20:20:54,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:20:55,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897761314] [2019-11-23 20:20:55,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498873078] [2019-11-23 20:20:55,250 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:55,378 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:55,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:55,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:20:55,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:20:55,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:55,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:20:55,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273354069] [2019-11-23 20:20:55,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:20:55,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:20:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:20:55,428 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand 37 states. [2019-11-23 20:20:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:55,545 INFO L93 Difference]: Finished difference Result 280 states and 346 transitions. [2019-11-23 20:20:55,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:20:55,546 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2019-11-23 20:20:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:55,547 INFO L225 Difference]: With dead ends: 280 [2019-11-23 20:20:55,547 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:20:55,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:20:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:20:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2019-11-23 20:20:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 20:20:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2019-11-23 20:20:55,557 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 113 [2019-11-23 20:20:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:55,557 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2019-11-23 20:20:55,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:20:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2019-11-23 20:20:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:20:55,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:55,558 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:55,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:55,762 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash -428325889, now seen corresponding path program 29 times [2019-11-23 20:20:55,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:55,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699039652] [2019-11-23 20:20:55,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:20:56,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699039652] [2019-11-23 20:20:56,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457995311] [2019-11-23 20:20:56,501 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:58,619 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2019-11-23 20:20:58,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:58,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:20:58,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:20:58,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:58,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:20:58,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114031237] [2019-11-23 20:20:58,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:20:58,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:58,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:20:58,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:20:58,664 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand 38 states. [2019-11-23 20:20:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:58,782 INFO L93 Difference]: Finished difference Result 282 states and 348 transitions. [2019-11-23 20:20:58,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:20:58,783 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 115 [2019-11-23 20:20:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:58,784 INFO L225 Difference]: With dead ends: 282 [2019-11-23 20:20:58,784 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 20:20:58,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:20:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 20:20:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2019-11-23 20:20:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-23 20:20:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2019-11-23 20:20:58,791 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 115 [2019-11-23 20:20:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:58,791 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2019-11-23 20:20:58,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:20:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2019-11-23 20:20:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:20:58,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:58,792 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:58,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:58,999 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:59,000 INFO L82 PathProgramCache]: Analyzing trace with hash 958337981, now seen corresponding path program 30 times [2019-11-23 20:20:59,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:59,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352267778] [2019-11-23 20:20:59,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:20:59,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352267778] [2019-11-23 20:20:59,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127335200] [2019-11-23 20:20:59,764 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:00,414 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:21:00,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:00,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:21:00,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 69 proven. 145 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2019-11-23 20:21:00,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:00,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 16] total 52 [2019-11-23 20:21:00,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7386683] [2019-11-23 20:21:00,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:21:00,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:21:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=1793, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:21:00,932 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 52 states. [2019-11-23 20:21:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:02,731 INFO L93 Difference]: Finished difference Result 302 states and 376 transitions. [2019-11-23 20:21:02,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:21:02,732 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 117 [2019-11-23 20:21:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:02,733 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:21:02,733 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 20:21:02,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2593, Invalid=7507, Unknown=0, NotChecked=0, Total=10100 [2019-11-23 20:21:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 20:21:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2019-11-23 20:21:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-11-23 20:21:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2019-11-23 20:21:02,741 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 117 [2019-11-23 20:21:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:02,741 INFO L462 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2019-11-23 20:21:02,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:21:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2019-11-23 20:21:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:21:02,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:02,742 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:02,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:02,947 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash 257114679, now seen corresponding path program 31 times [2019-11-23 20:21:02,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:02,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009736946] [2019-11-23 20:21:02,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 20:21:03,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009736946] [2019-11-23 20:21:03,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521039473] [2019-11-23 20:21:03,596 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:03,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:21:03,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 20:21:03,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:03,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:21:03,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237800035] [2019-11-23 20:21:03,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:21:03,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:03,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:21:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:21:03,710 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 41 states. [2019-11-23 20:21:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:03,853 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2019-11-23 20:21:03,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:21:03,854 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 124 [2019-11-23 20:21:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:03,855 INFO L225 Difference]: With dead ends: 300 [2019-11-23 20:21:03,855 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 20:21:03,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:21:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 20:21:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2019-11-23 20:21:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-11-23 20:21:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2019-11-23 20:21:03,863 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 124 [2019-11-23 20:21:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:03,864 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2019-11-23 20:21:03,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:21:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2019-11-23 20:21:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 20:21:03,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:03,865 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:04,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:04,068 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 140986425, now seen corresponding path program 32 times [2019-11-23 20:21:04,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:04,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957677068] [2019-11-23 20:21:04,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 20:21:04,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957677068] [2019-11-23 20:21:04,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961428652] [2019-11-23 20:21:04,888 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:04,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:04,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:04,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:21:04,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 20:21:05,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:05,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:21:05,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63984406] [2019-11-23 20:21:05,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:21:05,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:05,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:21:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:21:05,014 INFO L87 Difference]: Start difference. First operand 189 states and 224 transitions. Second operand 42 states. [2019-11-23 20:21:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:05,155 INFO L93 Difference]: Finished difference Result 302 states and 372 transitions. [2019-11-23 20:21:05,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:21:05,156 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 126 [2019-11-23 20:21:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:05,157 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:21:05,157 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:21:05,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:21:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:21:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2019-11-23 20:21:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-23 20:21:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 226 transitions. [2019-11-23 20:21:05,164 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 226 transitions. Word has length 126 [2019-11-23 20:21:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:05,164 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 226 transitions. [2019-11-23 20:21:05,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:21:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 226 transitions. [2019-11-23 20:21:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 20:21:05,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:05,165 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:05,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:05,369 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash 210884027, now seen corresponding path program 33 times [2019-11-23 20:21:05,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:05,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303455538] [2019-11-23 20:21:05,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 20:21:06,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303455538] [2019-11-23 20:21:06,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76905070] [2019-11-23 20:21:06,164 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:06,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:21:06,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:06,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:21:06,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2019-11-23 20:21:06,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:06,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 15] total 55 [2019-11-23 20:21:06,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586106786] [2019-11-23 20:21:06,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 20:21:06,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 20:21:06,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=2017, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:21:06,595 INFO L87 Difference]: Start difference. First operand 191 states and 226 transitions. Second operand 55 states. [2019-11-23 20:21:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:08,419 INFO L93 Difference]: Finished difference Result 321 states and 398 transitions. [2019-11-23 20:21:08,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 20:21:08,420 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 128 [2019-11-23 20:21:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:08,421 INFO L225 Difference]: With dead ends: 321 [2019-11-23 20:21:08,421 INFO L226 Difference]: Without dead ends: 211 [2019-11-23 20:21:08,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2853, Invalid=8489, Unknown=0, NotChecked=0, Total=11342 [2019-11-23 20:21:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-23 20:21:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 199. [2019-11-23 20:21:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-23 20:21:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2019-11-23 20:21:08,429 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 128 [2019-11-23 20:21:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:08,429 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2019-11-23 20:21:08,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 20:21:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2019-11-23 20:21:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:21:08,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:08,430 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:08,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:08,632 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:08,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1854862771, now seen corresponding path program 34 times [2019-11-23 20:21:08,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:08,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163255966] [2019-11-23 20:21:08,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1812 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 20:21:09,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163255966] [2019-11-23 20:21:09,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796623314] [2019-11-23 20:21:09,421 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:09,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:09,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:09,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:21:09,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1812 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 20:21:09,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:09,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 20:21:09,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345792340] [2019-11-23 20:21:09,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:21:09,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:09,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:21:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:21:09,542 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand 44 states. [2019-11-23 20:21:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:09,654 INFO L93 Difference]: Finished difference Result 318 states and 392 transitions. [2019-11-23 20:21:09,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:21:09,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 133 [2019-11-23 20:21:09,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:09,656 INFO L225 Difference]: With dead ends: 318 [2019-11-23 20:21:09,656 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:21:09,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:21:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:21:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2019-11-23 20:21:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-11-23 20:21:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2019-11-23 20:21:09,663 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 133 [2019-11-23 20:21:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:09,663 INFO L462 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2019-11-23 20:21:09,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:21:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2019-11-23 20:21:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:21:09,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:09,664 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:09,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:09,868 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash 221549041, now seen corresponding path program 35 times [2019-11-23 20:21:09,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:09,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403992863] [2019-11-23 20:21:09,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 20:21:10,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403992863] [2019-11-23 20:21:10,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459605605] [2019-11-23 20:21:10,592 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:13,367 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2019-11-23 20:21:13,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:13,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:21:13,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 20:21:13,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:13,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 20:21:13,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391058014] [2019-11-23 20:21:13,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:21:13,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:21:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:21:13,419 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand 45 states. [2019-11-23 20:21:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:13,601 INFO L93 Difference]: Finished difference Result 320 states and 394 transitions. [2019-11-23 20:21:13,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:21:13,602 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 135 [2019-11-23 20:21:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:13,603 INFO L225 Difference]: With dead ends: 320 [2019-11-23 20:21:13,604 INFO L226 Difference]: Without dead ends: 204 [2019-11-23 20:21:13,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:21:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-23 20:21:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2019-11-23 20:21:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-11-23 20:21:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 240 transitions. [2019-11-23 20:21:13,615 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 240 transitions. Word has length 135 [2019-11-23 20:21:13,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:13,615 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 240 transitions. [2019-11-23 20:21:13,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:21:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 240 transitions. [2019-11-23 20:21:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:21:13,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:13,617 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:13,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:13,829 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1729882449, now seen corresponding path program 36 times [2019-11-23 20:21:13,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:13,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112597761] [2019-11-23 20:21:13,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 20:21:14,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112597761] [2019-11-23 20:21:14,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841564711] [2019-11-23 20:21:14,599 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:15,879 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:21:15,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:15,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:21:15,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 83 proven. 210 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2019-11-23 20:21:16,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:16,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 18] total 61 [2019-11-23 20:21:16,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548715322] [2019-11-23 20:21:16,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-11-23 20:21:16,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:16,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-11-23 20:21:16,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1187, Invalid=2473, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 20:21:16,302 INFO L87 Difference]: Start difference. First operand 203 states and 240 transitions. Second operand 61 states. [2019-11-23 20:21:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:18,565 INFO L93 Difference]: Finished difference Result 340 states and 422 transitions. [2019-11-23 20:21:18,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-23 20:21:18,565 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 137 [2019-11-23 20:21:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:18,567 INFO L225 Difference]: With dead ends: 340 [2019-11-23 20:21:18,567 INFO L226 Difference]: Without dead ends: 224 [2019-11-23 20:21:18,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3581, Invalid=10461, Unknown=0, NotChecked=0, Total=14042 [2019-11-23 20:21:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-11-23 20:21:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 213. [2019-11-23 20:21:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-23 20:21:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 252 transitions. [2019-11-23 20:21:18,575 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 252 transitions. Word has length 137 [2019-11-23 20:21:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:18,575 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 252 transitions. [2019-11-23 20:21:18,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-11-23 20:21:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 252 transitions. [2019-11-23 20:21:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-23 20:21:18,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:18,577 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:18,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:18,782 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash 714545157, now seen corresponding path program 37 times [2019-11-23 20:21:18,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:18,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881997387] [2019-11-23 20:21:18,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:21:19,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881997387] [2019-11-23 20:21:19,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042897572] [2019-11-23 20:21:19,607 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:19,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:21:19,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:21:19,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:19,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-11-23 20:21:19,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932797970] [2019-11-23 20:21:19,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:21:19,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:21:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:21:19,766 INFO L87 Difference]: Start difference. First operand 213 states and 252 transitions. Second operand 48 states. [2019-11-23 20:21:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:19,918 INFO L93 Difference]: Finished difference Result 338 states and 416 transitions. [2019-11-23 20:21:19,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:21:19,919 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 144 [2019-11-23 20:21:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:19,920 INFO L225 Difference]: With dead ends: 338 [2019-11-23 20:21:19,920 INFO L226 Difference]: Without dead ends: 216 [2019-11-23 20:21:19,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:21:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-23 20:21:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2019-11-23 20:21:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-11-23 20:21:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 254 transitions. [2019-11-23 20:21:19,927 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 254 transitions. Word has length 144 [2019-11-23 20:21:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:19,928 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 254 transitions. [2019-11-23 20:21:19,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:21:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 254 transitions. [2019-11-23 20:21:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-23 20:21:19,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:19,929 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:20,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:20,132 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2137126649, now seen corresponding path program 38 times [2019-11-23 20:21:20,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:20,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220241552] [2019-11-23 20:21:20,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:21:21,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220241552] [2019-11-23 20:21:21,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499995370] [2019-11-23 20:21:21,520 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:21,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:21,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:21,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 20:21:21,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:21:21,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:21,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-11-23 20:21:21,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405472568] [2019-11-23 20:21:21,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:21:21,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:21:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:21:21,676 INFO L87 Difference]: Start difference. First operand 215 states and 254 transitions. Second operand 49 states. [2019-11-23 20:21:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:21,863 INFO L93 Difference]: Finished difference Result 340 states and 418 transitions. [2019-11-23 20:21:21,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:21:21,863 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 146 [2019-11-23 20:21:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:21,864 INFO L225 Difference]: With dead ends: 340 [2019-11-23 20:21:21,865 INFO L226 Difference]: Without dead ends: 218 [2019-11-23 20:21:21,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:21:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-11-23 20:21:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-11-23 20:21:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-11-23 20:21:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 256 transitions. [2019-11-23 20:21:21,872 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 256 transitions. Word has length 146 [2019-11-23 20:21:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:21,872 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 256 transitions. [2019-11-23 20:21:21,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:21:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 256 transitions. [2019-11-23 20:21:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-23 20:21:21,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:21,873 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:22,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:22,077 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1890369929, now seen corresponding path program 39 times [2019-11-23 20:21:22,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:22,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581087087] [2019-11-23 20:21:22,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:21:22,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581087087] [2019-11-23 20:21:22,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420470967] [2019-11-23 20:21:22,961 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:23,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-11-23 20:21:23,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:23,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:21:23,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2019-11-23 20:21:23,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:23,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 17] total 64 [2019-11-23 20:21:23,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099748206] [2019-11-23 20:21:23,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 20:21:23,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 20:21:23,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=2735, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:21:23,618 INFO L87 Difference]: Start difference. First operand 217 states and 256 transitions. Second operand 64 states. [2019-11-23 20:21:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:25,973 INFO L93 Difference]: Finished difference Result 359 states and 444 transitions. [2019-11-23 20:21:25,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-23 20:21:25,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 148 [2019-11-23 20:21:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:25,975 INFO L225 Difference]: With dead ends: 359 [2019-11-23 20:21:25,975 INFO L226 Difference]: Without dead ends: 237 [2019-11-23 20:21:25,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3885, Invalid=11615, Unknown=0, NotChecked=0, Total=15500 [2019-11-23 20:21:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-23 20:21:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 225. [2019-11-23 20:21:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-11-23 20:21:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2019-11-23 20:21:25,984 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 148 [2019-11-23 20:21:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:25,984 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2019-11-23 20:21:25,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 20:21:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2019-11-23 20:21:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-23 20:21:25,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:25,985 INFO L410 BasicCegarLoop]: trace histogram [47, 47, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:26,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:26,190 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash 174359589, now seen corresponding path program 40 times [2019-11-23 20:21:26,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:26,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609831146] [2019-11-23 20:21:26,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2498 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:21:27,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609831146] [2019-11-23 20:21:27,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272443107] [2019-11-23 20:21:27,135 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:27,236 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:27,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:27,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:21:27,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2498 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:21:27,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:27,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2019-11-23 20:21:27,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425460627] [2019-11-23 20:21:27,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:21:27,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:21:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:21:27,265 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand 51 states. [2019-11-23 20:21:27,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:27,463 INFO L93 Difference]: Finished difference Result 356 states and 438 transitions. [2019-11-23 20:21:27,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:21:27,464 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 153 [2019-11-23 20:21:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:27,465 INFO L225 Difference]: With dead ends: 356 [2019-11-23 20:21:27,465 INFO L226 Difference]: Without dead ends: 228 [2019-11-23 20:21:27,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:21:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-11-23 20:21:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2019-11-23 20:21:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-11-23 20:21:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 268 transitions. [2019-11-23 20:21:27,473 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 268 transitions. Word has length 153 [2019-11-23 20:21:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:27,473 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 268 transitions. [2019-11-23 20:21:27,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:21:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 268 transitions. [2019-11-23 20:21:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:21:27,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:27,474 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:27,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:27,678 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash 657429859, now seen corresponding path program 41 times [2019-11-23 20:21:27,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:27,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257929405] [2019-11-23 20:21:27,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:21:28,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257929405] [2019-11-23 20:21:28,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735207701] [2019-11-23 20:21:28,778 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true