/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_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:23:55,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:23:55,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:23:55,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:23:55,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:23:55,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:23:55,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:23:55,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:23:55,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:23:55,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:23:55,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:23:55,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:23:55,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:23:55,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:23:55,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:23:55,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:23:55,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:23:55,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:23:55,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:23:55,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:23:55,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:23:55,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:23:55,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:23:55,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:23:55,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:23:55,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:23:55,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:23:55,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:23:55,737 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 20:23:55,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:23:55,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:23:55,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:23:55,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:23:55,760 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:23:55,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:23:55,761 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:23:55,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:23:55,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:23:55,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:23:55,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:23:55,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:23:55,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:23:55,763 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:23:55,764 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:23:55,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:23:55,764 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:23:55,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:23:55,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:23:55,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:23:55,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:23:55,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:23:55,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:23:55,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:23:55,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:23:55,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:23:55,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:23:55,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:23:55,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:23:55,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:23:56,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:23:56,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:23:56,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:23:56,071 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:23:56,071 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:23:56,072 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-11-23 20:23:56,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cf11914/f324d3ca820f459f83cce8e1ea618c9b/FLAGf512495d9 [2019-11-23 20:23:56,595 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:23:56,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-11-23 20:23:56,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cf11914/f324d3ca820f459f83cce8e1ea618c9b/FLAGf512495d9 [2019-11-23 20:23:56,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cf11914/f324d3ca820f459f83cce8e1ea618c9b [2019-11-23 20:23:56,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:23:56,988 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:23:56,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:56,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:23:56,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:23:56,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:56" (1/1) ... [2019-11-23 20:23:57,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577254a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:56, skipping insertion in model container [2019-11-23 20:23:57,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:56" (1/1) ... [2019-11-23 20:23:57,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:23:57,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:23:57,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:57,279 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:23:57,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:57,324 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:23:57,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57 WrapperNode [2019-11-23 20:23:57,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:57,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:57,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:23:57,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:23:57,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:57,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:23:57,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:23:57,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:23:57,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:23:57,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:23:57,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:23:57,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:23:57,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (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 20:23:57,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:23:57,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:23:57,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:23:57,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:23:57,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:23:57,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:23:57,909 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:23:57,909 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 20:23:57,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:57 BoogieIcfgContainer [2019-11-23 20:23:57,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:23:57,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:23:57,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:23:57,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:23:57,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:23:56" (1/3) ... [2019-11-23 20:23:57,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77886e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:57, skipping insertion in model container [2019-11-23 20:23:57,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57" (2/3) ... [2019-11-23 20:23:57,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77886e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:57, skipping insertion in model container [2019-11-23 20:23:57,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:57" (3/3) ... [2019-11-23 20:23:57,931 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2019-11-23 20:23:57,942 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:23:57,950 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:23:57,962 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:23:57,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:23:57,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:23:57,985 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:23:57,986 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:23:57,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:23:57,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:23:57,986 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:23:57,986 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:23:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-23 20:23:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:23:58,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:58,014 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:58,015 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:58,020 INFO L82 PathProgramCache]: Analyzing trace with hash -962610817, now seen corresponding path program 1 times [2019-11-23 20:23:58,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:58,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601626724] [2019-11-23 20:23:58,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:58,213 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 20:23:58,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601626724] [2019-11-23 20:23:58,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:58,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:58,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226975557] [2019-11-23 20:23:58,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:58,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:58,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:58,244 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-23 20:23:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:58,306 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2019-11-23 20:23:58,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:58,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:23:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:58,317 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:23:58,318 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:23:58,321 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 20:23:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:23:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:23:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:23:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 20:23:58,354 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2019-11-23 20:23:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:58,354 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 20:23:58,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 20:23:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:23:58,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:58,356 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] [2019-11-23 20:23:58,356 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1385693007, now seen corresponding path program 1 times [2019-11-23 20:23:58,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:58,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655855411] [2019-11-23 20:23:58,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:58,416 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 20:23:58,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655855411] [2019-11-23 20:23:58,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:58,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:58,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989718596] [2019-11-23 20:23:58,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:58,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:58,421 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-11-23 20:23:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:58,552 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2019-11-23 20:23:58,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:58,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-23 20:23:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:58,554 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:23:58,554 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:23:58,556 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 20:23:58,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:23:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-11-23 20:23:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:23:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-23 20:23:58,563 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2019-11-23 20:23:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:58,564 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-23 20:23:58,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-23 20:23:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:23:58,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:58,566 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, 1] [2019-11-23 20:23:58,566 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1933824923, now seen corresponding path program 1 times [2019-11-23 20:23:58,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:58,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230760008] [2019-11-23 20:23:58,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:58,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230760008] [2019-11-23 20:23:58,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432974109] [2019-11-23 20:23:58,688 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 20:23:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:58,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:23:58,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:58,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:58,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:23:58,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020743196] [2019-11-23 20:23:58,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:23:58,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:58,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:23:58,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:23:58,850 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2019-11-23 20:23:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:58,886 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2019-11-23 20:23:58,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:23:58,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-11-23 20:23:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:58,888 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:23:58,888 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:23:58,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 20:23:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:23:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-23 20:23:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:23:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-23 20:23:58,896 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 33 [2019-11-23 20:23:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:58,896 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-23 20:23:58,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:23:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-23 20:23:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:23:58,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:58,898 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:59,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:59,103 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2053832611, now seen corresponding path program 2 times [2019-11-23 20:23:59,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:59,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075580779] [2019-11-23 20:23:59,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:59,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075580779] [2019-11-23 20:23:59,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771793955] [2019-11-23 20:23:59,229 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 20:23:59,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:23:59,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:59,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:23:59,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:59,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:59,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:23:59,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553707539] [2019-11-23 20:23:59,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:23:59,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:59,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:23:59,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:23:59,328 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 6 states. [2019-11-23 20:23:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:59,356 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2019-11-23 20:23:59,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:23:59,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-23 20:23:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:59,357 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:23:59,357 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:23:59,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 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 20:23:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:23:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:23:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:23:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-11-23 20:23:59,364 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 35 [2019-11-23 20:23:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:59,365 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-11-23 20:23:59,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:23:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-11-23 20:23:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:23:59,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:59,366 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:59,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:59,579 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1213072543, now seen corresponding path program 3 times [2019-11-23 20:23:59,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:59,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289065057] [2019-11-23 20:23:59,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:59,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289065057] [2019-11-23 20:23:59,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827518125] [2019-11-23 20:23:59,718 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 20:23:59,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:23:59,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:59,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:23:59,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:23:59,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:59,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:23:59,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287018700] [2019-11-23 20:23:59,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:23:59,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:59,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:23:59,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:23:59,825 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 8 states. [2019-11-23 20:24:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:00,043 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2019-11-23 20:24:00,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:24:00,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2019-11-23 20:24:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:00,045 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:24:00,045 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:24:00,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:24:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:24:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-11-23 20:24:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:24:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-23 20:24:00,064 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 37 [2019-11-23 20:24:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:00,065 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-23 20:24:00,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:24:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-23 20:24:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:24:00,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:00,067 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 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] [2019-11-23 20:24:00,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:00,282 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash 322242131, now seen corresponding path program 4 times [2019-11-23 20:24:00,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:00,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140515680] [2019-11-23 20:24:00,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:24:00,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140515680] [2019-11-23 20:24:00,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418646950] [2019-11-23 20:24:00,399 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 20:24:00,460 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:24:00,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:00,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:24:00,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:24:00,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:00,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:24:00,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064697938] [2019-11-23 20:24:00,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:24:00,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:24:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:24:00,487 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 8 states. [2019-11-23 20:24:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:00,544 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2019-11-23 20:24:00,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:24:00,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-23 20:24:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:00,545 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:24:00,545 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:24:00,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 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 20:24:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:24:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-11-23 20:24:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:24:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2019-11-23 20:24:00,561 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 51 [2019-11-23 20:24:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:00,561 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2019-11-23 20:24:00,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:24:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2019-11-23 20:24:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:24:00,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:00,567 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 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] [2019-11-23 20:24:00,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:00,769 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:00,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1865991697, now seen corresponding path program 5 times [2019-11-23 20:24:00,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:00,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616060654] [2019-11-23 20:24:00,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:24:00,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616060654] [2019-11-23 20:24:00,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775446496] [2019-11-23 20:24:00,902 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 20:24:02,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:24:02,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:02,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:24:02,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:24:02,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:02,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:24:02,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364509490] [2019-11-23 20:24:02,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:24:02,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:02,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:24:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:24:02,471 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 11 states. [2019-11-23 20:24:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:02,714 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2019-11-23 20:24:02,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:24:02,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-11-23 20:24:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:02,716 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:24:02,716 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:24:02,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:24:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:24:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2019-11-23 20:24:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:24:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2019-11-23 20:24:02,738 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 53 [2019-11-23 20:24:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:02,739 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2019-11-23 20:24:02,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:24:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2019-11-23 20:24:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:24:02,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:02,740 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2019-11-23 20:24:02,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:02,948 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash 631233795, now seen corresponding path program 6 times [2019-11-23 20:24:02,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:02,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457162769] [2019-11-23 20:24:02,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 20:24:03,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457162769] [2019-11-23 20:24:03,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812714850] [2019-11-23 20:24:03,106 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 20:24:03,332 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:24:03,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:03,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:24:03,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:24:03,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:03,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:24:03,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851818938] [2019-11-23 20:24:03,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:24:03,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:03,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:24:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:24:03,384 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 13 states. [2019-11-23 20:24:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:03,614 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2019-11-23 20:24:03,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:24:03,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2019-11-23 20:24:03,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:03,616 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:24:03,616 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:24:03,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:24:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:24:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2019-11-23 20:24:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:24:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2019-11-23 20:24:03,626 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 67 [2019-11-23 20:24:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:03,627 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2019-11-23 20:24:03,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:24:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2019-11-23 20:24:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:24:03,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:03,628 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 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] [2019-11-23 20:24:03,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:03,834 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash -266902411, now seen corresponding path program 7 times [2019-11-23 20:24:03,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:03,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613453339] [2019-11-23 20:24:03,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:24:03,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613453339] [2019-11-23 20:24:03,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003372913] [2019-11-23 20:24:03,968 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 20:24:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:04,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:24:04,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:24:04,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:04,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:24:04,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712699570] [2019-11-23 20:24:04,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:24:04,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:24:04,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:24:04,065 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 11 states. [2019-11-23 20:24:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:04,100 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2019-11-23 20:24:04,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:24:04,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2019-11-23 20:24:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:04,102 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:24:04,102 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:24:04,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 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 20:24:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:24:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:24:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:24:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-11-23 20:24:04,110 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 81 [2019-11-23 20:24:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:04,110 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-11-23 20:24:04,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:24:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-11-23 20:24:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:24:04,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:04,112 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 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] [2019-11-23 20:24:04,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:04,318 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:04,318 INFO L82 PathProgramCache]: Analyzing trace with hash -687373389, now seen corresponding path program 8 times [2019-11-23 20:24:04,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:04,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846494758] [2019-11-23 20:24:04,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:24:04,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846494758] [2019-11-23 20:24:04,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758933666] [2019-11-23 20:24:04,461 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 20:24:04,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:24:04,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:04,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:24:04,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:24:04,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:04,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:24:04,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684368418] [2019-11-23 20:24:04,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:24:04,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:04,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:24:04,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:24:04,565 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 12 states. [2019-11-23 20:24:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:04,621 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2019-11-23 20:24:04,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:24:04,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-11-23 20:24:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:04,623 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:24:04,623 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:24:04,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 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 20:24:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:24:04,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:24:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:24:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2019-11-23 20:24:04,638 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 83 [2019-11-23 20:24:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:04,639 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2019-11-23 20:24:04,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:24:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2019-11-23 20:24:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:24:04,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:04,640 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 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] [2019-11-23 20:24:04,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:04,845 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1033057423, now seen corresponding path program 9 times [2019-11-23 20:24:04,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:04,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800390547] [2019-11-23 20:24:04,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:24:04,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800390547] [2019-11-23 20:24:04,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450369235] [2019-11-23 20:24:04,980 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:05,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:24:05,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:05,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:24:05,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-11-23 20:24:05,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:05,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:24:05,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97793682] [2019-11-23 20:24:05,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:24:05,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:05,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:24:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:24:05,316 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 17 states. [2019-11-23 20:24:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:05,670 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2019-11-23 20:24:05,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:24:05,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2019-11-23 20:24:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:05,672 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:24:05,672 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:24:05,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:24:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:24:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2019-11-23 20:24:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:24:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2019-11-23 20:24:05,680 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 85 [2019-11-23 20:24:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:05,681 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2019-11-23 20:24:05,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:24:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2019-11-23 20:24:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:24:05,682 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:05,682 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 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] [2019-11-23 20:24:05,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:05,893 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1606941283, now seen corresponding path program 10 times [2019-11-23 20:24:05,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:05,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246169084] [2019-11-23 20:24:05,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 20:24:06,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246169084] [2019-11-23 20:24:06,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117419368] [2019-11-23 20:24:06,044 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:06,135 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:24:06,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:06,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:24:06,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 20:24:06,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:06,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:24:06,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186120659] [2019-11-23 20:24:06,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:24:06,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:24:06,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:24:06,175 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 14 states. [2019-11-23 20:24:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:06,243 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2019-11-23 20:24:06,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:24:06,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2019-11-23 20:24:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:06,245 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:24:06,245 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 20:24:06,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:24:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 20:24:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 20:24:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:24:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2019-11-23 20:24:06,253 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 99 [2019-11-23 20:24:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:06,254 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2019-11-23 20:24:06,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:24:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2019-11-23 20:24:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:24:06,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:06,255 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 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] [2019-11-23 20:24:06,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:06,462 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:06,462 INFO L82 PathProgramCache]: Analyzing trace with hash -606992863, now seen corresponding path program 11 times [2019-11-23 20:24:06,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:06,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548710822] [2019-11-23 20:24:06,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 20:24:06,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548710822] [2019-11-23 20:24:06,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543899417] [2019-11-23 20:24:06,654 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true