/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/standard_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:31:22,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:31:22,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:31:22,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:31:22,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:31:22,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:31:22,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:31:22,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:31:22,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:31:22,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:31:22,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:31:22,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:31:22,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:31:22,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:31:22,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:31:22,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:31:22,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:31:22,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:31:22,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:31:22,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:31:22,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:31:22,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:31:22,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:31:22,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:31:22,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:31:22,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:31:22,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:31:22,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:31:22,979 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 20:31:23,009 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:31:23,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:31:23,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:31:23,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:31:23,017 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:31:23,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:31:23,018 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:31:23,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:31:23,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:31:23,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:31:23,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:31:23,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:31:23,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:31:23,019 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:31:23,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:31:23,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:31:23,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:31:23,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:31:23,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:31:23,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:31:23,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:31:23,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:31:23,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:31:23,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:31:23,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:31:23,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:31:23,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:31:23,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:31:23,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:31:23,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:31:23,287 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:31:23,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:31:23,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:31:23,311 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:31:23,311 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:31:23,312 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-11-23 20:31:23,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ede8669/8f7db10fdd064f9c94c0d52d3105e98b/FLAGb53b4b256 [2019-11-23 20:31:23,878 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:31:23,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-11-23 20:31:23,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ede8669/8f7db10fdd064f9c94c0d52d3105e98b/FLAGb53b4b256 [2019-11-23 20:31:24,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ede8669/8f7db10fdd064f9c94c0d52d3105e98b [2019-11-23 20:31:24,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:31:24,366 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:31:24,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:24,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:31:24,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:31:24,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a736ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24, skipping insertion in model container [2019-11-23 20:31:24,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:31:24,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:31:24,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:24,610 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:31:24,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:24,735 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:31:24,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24 WrapperNode [2019-11-23 20:31:24,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:24,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:24,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:31:24,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:31:24,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:24,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:31:24,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:31:24,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:31:24,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (1/1) ... [2019-11-23 20:31:24,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:31:24,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:31:24,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:31:24,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:31:24,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (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 20:31:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:31:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:31:24,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:31:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:31:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:31:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:31:25,186 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:31:25,187 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-23 20:31:25,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:25 BoogieIcfgContainer [2019-11-23 20:31:25,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:31:25,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:31:25,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:31:25,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:31:25,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:24" (1/3) ... [2019-11-23 20:31:25,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcb6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:25, skipping insertion in model container [2019-11-23 20:31:25,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:24" (2/3) ... [2019-11-23 20:31:25,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcb6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:25, skipping insertion in model container [2019-11-23 20:31:25,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:25" (3/3) ... [2019-11-23 20:31:25,209 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2019-11-23 20:31:25,220 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:31:25,226 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:31:25,234 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:31:25,256 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:31:25,257 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:31:25,257 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:31:25,257 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:31:25,257 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:31:25,257 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:31:25,258 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:31:25,258 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:31:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 20:31:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:31:25,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:25,278 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:25,279 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1478943884, now seen corresponding path program 1 times [2019-11-23 20:31:25,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:25,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647720759] [2019-11-23 20:31:25,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:25,439 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 20:31:25,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647720759] [2019-11-23 20:31:25,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:25,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:31:25,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095219583] [2019-11-23 20:31:25,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:31:25,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:31:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:31:25,460 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-11-23 20:31:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:25,603 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2019-11-23 20:31:25,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:31:25,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 20:31:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:25,616 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:31:25,617 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:31:25,621 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 20:31:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:31:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 20:31:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:31:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-23 20:31:25,665 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2019-11-23 20:31:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:25,666 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-23 20:31:25,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:31:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-23 20:31:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:31:25,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:25,668 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:25,668 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash 527193407, now seen corresponding path program 1 times [2019-11-23 20:31:25,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:25,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388152763] [2019-11-23 20:31:25,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:31:25,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388152763] [2019-11-23 20:31:25,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525361274] [2019-11-23 20:31:25,838 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 20:31:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:25,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:31:25,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:31:25,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:25,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:31:25,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715740643] [2019-11-23 20:31:25,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:31:25,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:25,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:31:25,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:31:25,961 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2019-11-23 20:31:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:26,095 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2019-11-23 20:31:26,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:31:26,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-11-23 20:31:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:26,097 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:31:26,098 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:31:26,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 20:31:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:31:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:31:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:31:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-11-23 20:31:26,110 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 32 [2019-11-23 20:31:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:26,110 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-11-23 20:31:26,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:31:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-11-23 20:31:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:31:26,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:26,113 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:26,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:26,314 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:26,315 INFO L82 PathProgramCache]: Analyzing trace with hash -368986008, now seen corresponding path program 2 times [2019-11-23 20:31:26,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:26,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225826960] [2019-11-23 20:31:26,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:31:26,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225826960] [2019-11-23 20:31:26,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137605910] [2019-11-23 20:31:26,422 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 20:31:26,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:26,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:26,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:31:26,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:31:26,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:26,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:31:26,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241288325] [2019-11-23 20:31:26,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:31:26,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:31:26,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:31:26,525 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-11-23 20:31:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:26,680 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2019-11-23 20:31:26,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:31:26,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-23 20:31:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:26,682 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:31:26,683 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:31:26,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:31:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:31:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:31:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:31:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-11-23 20:31:26,698 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 41 [2019-11-23 20:31:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:26,699 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-11-23 20:31:26,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:31:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-11-23 20:31:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:31:26,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:26,706 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:26,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:26,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash 763354719, now seen corresponding path program 3 times [2019-11-23 20:31:26,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:26,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558726715] [2019-11-23 20:31:26,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:31:27,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558726715] [2019-11-23 20:31:27,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413047734] [2019-11-23 20:31:27,100 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:27,205 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:31:27,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:27,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:31:27,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:31:27,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:27,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:31:27,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565114184] [2019-11-23 20:31:27,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:31:27,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:27,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:31:27,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:31:27,235 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 7 states. [2019-11-23 20:31:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:27,415 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2019-11-23 20:31:27,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:31:27,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-23 20:31:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:27,416 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:31:27,417 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:31:27,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 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 20:31:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:31:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:31:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:31:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-11-23 20:31:27,428 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 50 [2019-11-23 20:31:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:27,428 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-11-23 20:31:27,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:31:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-11-23 20:31:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:31:27,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:27,430 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:27,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:27,638 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash -500879800, now seen corresponding path program 4 times [2019-11-23 20:31:27,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:27,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452259076] [2019-11-23 20:31:27,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:31:27,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452259076] [2019-11-23 20:31:27,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071950965] [2019-11-23 20:31:27,785 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:27,845 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:27,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:27,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:31:27,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:31:27,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:27,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:31:27,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702837823] [2019-11-23 20:31:27,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:31:27,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:31:27,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:27,869 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2019-11-23 20:31:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:28,043 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2019-11-23 20:31:28,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:31:28,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2019-11-23 20:31:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:28,045 INFO L225 Difference]: With dead ends: 126 [2019-11-23 20:31:28,045 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:31:28,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 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 20:31:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:31:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-23 20:31:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 20:31:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2019-11-23 20:31:28,067 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 59 [2019-11-23 20:31:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:28,067 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2019-11-23 20:31:28,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:31:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2019-11-23 20:31:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:31:28,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:28,072 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:28,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:28,283 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:28,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1617731713, now seen corresponding path program 5 times [2019-11-23 20:31:28,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:28,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373910581] [2019-11-23 20:31:28,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:31:28,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373910581] [2019-11-23 20:31:28,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577626901] [2019-11-23 20:31:28,411 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:54,782 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:32:54,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:54,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:32:54,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:32:54,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:54,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:32:54,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145288534] [2019-11-23 20:32:54,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:32:54,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:32:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:32:54,859 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 9 states. [2019-11-23 20:32:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:55,013 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2019-11-23 20:32:55,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:32:55,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-11-23 20:32:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:55,015 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:32:55,015 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:32:55,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 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 20:32:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:32:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-23 20:32:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:32:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2019-11-23 20:32:55,025 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 68 [2019-11-23 20:32:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:55,025 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2019-11-23 20:32:55,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:32:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2019-11-23 20:32:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:32:55,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:55,027 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:55,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:55,244 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:55,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1599394776, now seen corresponding path program 6 times [2019-11-23 20:32:55,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:55,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817769800] [2019-11-23 20:32:55,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-23 20:32:55,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817769800] [2019-11-23 20:32:55,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118934228] [2019-11-23 20:32:55,391 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:57,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:32:57,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:57,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:32:57,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-23 20:32:57,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:57,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:32:57,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224308825] [2019-11-23 20:32:57,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:32:57,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:32:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:32:57,622 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 10 states. [2019-11-23 20:32:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:57,791 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2019-11-23 20:32:57,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:32:57,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2019-11-23 20:32:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:57,792 INFO L225 Difference]: With dead ends: 160 [2019-11-23 20:32:57,792 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:32:57,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 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 20:32:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:32:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-11-23 20:32:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:32:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2019-11-23 20:32:57,802 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 77 [2019-11-23 20:32:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:57,802 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2019-11-23 20:32:57,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:32:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2019-11-23 20:32:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:32:57,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:57,804 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:58,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,011 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:58,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1824577695, now seen corresponding path program 7 times [2019-11-23 20:32:58,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:58,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135834139] [2019-11-23 20:32:58,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:32:58,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135834139] [2019-11-23 20:32:58,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910838212] [2019-11-23 20:32:58,156 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:58,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:32:58,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:32:58,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:58,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:32:58,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443562506] [2019-11-23 20:32:58,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:32:58,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:32:58,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:32:58,268 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 11 states. [2019-11-23 20:32:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:58,450 INFO L93 Difference]: Finished difference Result 177 states and 203 transitions. [2019-11-23 20:32:58,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:32:58,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2019-11-23 20:32:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:58,455 INFO L225 Difference]: With dead ends: 177 [2019-11-23 20:32:58,455 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:32:58,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:32:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:32:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-11-23 20:32:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:32:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2019-11-23 20:32:58,470 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 86 [2019-11-23 20:32:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:58,470 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2019-11-23 20:32:58,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:32:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2019-11-23 20:32:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:32:58,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:58,474 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:58,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,678 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1137069560, now seen corresponding path program 8 times [2019-11-23 20:32:58,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:58,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841158841] [2019-11-23 20:32:58,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:32:58,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841158841] [2019-11-23 20:32:58,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494102589] [2019-11-23 20:32:58,823 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:58,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:58,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:32:58,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:32:58,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:58,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:32:58,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914305106] [2019-11-23 20:32:58,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:32:58,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:32:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:32:58,923 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand 12 states. [2019-11-23 20:32:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:59,138 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2019-11-23 20:32:59,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:32:59,139 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2019-11-23 20:32:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:59,140 INFO L225 Difference]: With dead ends: 194 [2019-11-23 20:32:59,140 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:32:59,141 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 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 20:32:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:32:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-11-23 20:32:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 20:32:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2019-11-23 20:32:59,148 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 95 [2019-11-23 20:32:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:59,148 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2019-11-23 20:32:59,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:32:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2019-11-23 20:32:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:32:59,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:59,150 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:59,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:59,358 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash -6141505, now seen corresponding path program 9 times [2019-11-23 20:32:59,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:59,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137926294] [2019-11-23 20:32:59,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-23 20:32:59,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137926294] [2019-11-23 20:32:59,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901065069] [2019-11-23 20:32:59,496 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true