/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_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:31:27,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:31:27,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:31:27,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:31:27,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:31:27,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:31:27,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:31:27,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:31:27,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:31:27,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:31:27,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:31:27,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:31:27,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:31:27,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:31:27,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:31:27,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:31:27,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:31:27,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:31:27,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:31:27,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:31:27,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:31:27,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:31:27,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:31:27,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:31:27,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:31:27,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:31:27,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:31:27,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:31:27,155 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 20:31:27,193 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:31:27,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:31:27,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:31:27,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:31:27,196 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:31:27,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:31:27,198 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:31:27,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:31:27,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:31:27,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:31:27,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:31:27,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:31:27,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:31:27,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:31:27,199 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:31:27,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:31:27,201 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:31:27,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:31:27,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:31:27,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:31:27,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:31:27,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:31:27,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:31:27,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:31:27,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:31:27,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:31:27,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:31:27,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:31:27,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:31:27,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:31:27,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:31:27,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:31:27,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:31:27,570 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:31:27,571 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:31:27,572 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-11-23 20:31:27,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d41dab675/b3943360483d42d186571870e43b8b8f/FLAG0a8e0c5de [2019-11-23 20:31:28,069 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:31:28,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-11-23 20:31:28,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d41dab675/b3943360483d42d186571870e43b8b8f/FLAG0a8e0c5de [2019-11-23 20:31:28,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d41dab675/b3943360483d42d186571870e43b8b8f [2019-11-23 20:31:28,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:31:28,488 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:31:28,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:28,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:31:28,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:31:28,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127afcab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28, skipping insertion in model container [2019-11-23 20:31:28,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:31:28,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:31:28,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:28,732 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:31:28,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:28,777 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:31:28,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28 WrapperNode [2019-11-23 20:31:28,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:28,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:28,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:31:28,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:31:28,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:28,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:31:28,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:31:28,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:31:28,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (1/1) ... [2019-11-23 20:31:28,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:31:28,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:31:28,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:31:28,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:31:28,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (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 20:31:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:31:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:31:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:31:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:31:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:31:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:31:29,288 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:31:29,288 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:31:29,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:29 BoogieIcfgContainer [2019-11-23 20:31:29,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:31:29,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:31:29,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:31:29,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:31:29,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:28" (1/3) ... [2019-11-23 20:31:29,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1173263a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:29, skipping insertion in model container [2019-11-23 20:31:29,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:28" (2/3) ... [2019-11-23 20:31:29,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1173263a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:29, skipping insertion in model container [2019-11-23 20:31:29,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:29" (3/3) ... [2019-11-23 20:31:29,317 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2019-11-23 20:31:29,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:31:29,347 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:31:29,371 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:31:29,407 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:31:29,408 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:31:29,408 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:31:29,408 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:31:29,408 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:31:29,408 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:31:29,409 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:31:29,409 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:31:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 20:31:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:29,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:29,429 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:29,429 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2019-11-23 20:31:29,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:29,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792382888] [2019-11-23 20:31:29,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:29,560 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 20:31:29,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792382888] [2019-11-23 20:31:29,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:29,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:31:29,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653226877] [2019-11-23 20:31:29,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:31:29,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:31:29,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:31:29,587 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-23 20:31:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:29,602 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-11-23 20:31:29,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:31:29,604 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:31:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:29,612 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:31:29,613 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:31:29,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:31:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:31:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:31:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:31:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:31:29,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2019-11-23 20:31:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:29,654 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:31:29,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:31:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:31:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:29,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:29,656 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:29,656 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2015341610, now seen corresponding path program 1 times [2019-11-23 20:31:29,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:29,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921696514] [2019-11-23 20:31:29,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:29,707 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 20:31:29,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921696514] [2019-11-23 20:31:29,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:29,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:31:29,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197223919] [2019-11-23 20:31:29,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:31:29,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:31:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:31:29,712 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2019-11-23 20:31:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:29,731 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-23 20:31:29,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:31:29,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:31:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:29,733 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:31:29,734 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:31:29,735 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 20:31:29,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:31:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 20:31:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:31:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 20:31:29,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2019-11-23 20:31:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:29,740 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 20:31:29,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:31:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 20:31:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:31:29,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:29,741 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:29,742 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2019-11-23 20:31:29,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:29,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407612261] [2019-11-23 20:31:29,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:29,791 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 20:31:29,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407612261] [2019-11-23 20:31:29,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:29,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:31:29,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883003729] [2019-11-23 20:31:29,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:31:29,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:31:29,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:31:29,795 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-23 20:31:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:29,849 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 20:31:29,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:31:29,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:31:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:29,851 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:31:29,851 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:31:29,852 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 20:31:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:31:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-23 20:31:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:31:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:31:29,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-23 20:31:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:29,857 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:31:29,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:31:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:31:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:31:29,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:29,858 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:29,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2019-11-23 20:31:29,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:29,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846904364] [2019-11-23 20:31:29,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:29,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846904364] [2019-11-23 20:31:29,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340782583] [2019-11-23 20:31:29,915 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 20:31:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:29,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:31:29,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:30,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:30,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:31:30,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57209753] [2019-11-23 20:31:30,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:31:30,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:30,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:31:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:31:30,012 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-23 20:31:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:30,038 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2019-11-23 20:31:30,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:31:30,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:31:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:30,040 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:31:30,040 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:31:30,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:31:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:31:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 20:31:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:31:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 20:31:30,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2019-11-23 20:31:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:30,046 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 20:31:30,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:31:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 20:31:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:31:30,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:30,047 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:30,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:30,260 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1501972051, now seen corresponding path program 2 times [2019-11-23 20:31:30,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:30,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526120095] [2019-11-23 20:31:30,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:30,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526120095] [2019-11-23 20:31:30,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381458671] [2019-11-23 20:31:30,363 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 20:31:30,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:30,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:30,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:31:30,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:30,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:30,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:31:30,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352758077] [2019-11-23 20:31:30,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:31:30,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:30,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:31:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:31:30,446 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2019-11-23 20:31:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:30,488 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-11-23 20:31:30,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:31:30,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-23 20:31:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:30,491 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:31:30,491 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:31:30,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 20:31:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:31:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:31:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:31:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-23 20:31:30,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2019-11-23 20:31:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:30,502 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-23 20:31:30,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:31:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-23 20:31:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:31:30,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:30,504 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:30,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:30,717 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash -903915691, now seen corresponding path program 3 times [2019-11-23 20:31:30,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:30,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764298628] [2019-11-23 20:31:30,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:30,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764298628] [2019-11-23 20:31:30,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694517618] [2019-11-23 20:31:30,789 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 20:31:30,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:31:30,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:30,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:31:30,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:31:30,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:30,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:31:30,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941171759] [2019-11-23 20:31:30,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:31:30,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:31:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:30,863 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 8 states. [2019-11-23 20:31:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:30,950 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-11-23 20:31:30,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:31:30,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-23 20:31:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:30,952 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:31:30,952 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:31:30,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 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 20:31:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:31:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-23 20:31:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:31:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:31:30,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2019-11-23 20:31:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:30,966 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:31:30,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:31:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:31:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:31:30,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:30,969 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:31,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:31,170 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1422267182, now seen corresponding path program 4 times [2019-11-23 20:31:31,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:31,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544201241] [2019-11-23 20:31:31,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:31,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544201241] [2019-11-23 20:31:31,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601509257] [2019-11-23 20:31:31,255 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 20:31:31,300 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:31,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:31,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:31:31,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:31,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:31,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:31:31,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264182870] [2019-11-23 20:31:31,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:31:31,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:31,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:31:31,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:31,329 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2019-11-23 20:31:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:31,376 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-23 20:31:31,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:31:31,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 20:31:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:31,378 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:31:31,378 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:31:31,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 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 20:31:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:31:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:31:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:31:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:31:31,388 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2019-11-23 20:31:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:31,388 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:31:31,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:31:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:31:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:31:31,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:31,391 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:31,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:31,596 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2043296748, now seen corresponding path program 5 times [2019-11-23 20:31:31,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:31,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710145216] [2019-11-23 20:31:31,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:31,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710145216] [2019-11-23 20:31:31,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037967403] [2019-11-23 20:31:31,712 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 20:31:31,762 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:31:31,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:31,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:31:31,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:31:31,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:31,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:31:31,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563741120] [2019-11-23 20:31:31,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:31:31,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:31:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:31,814 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2019-11-23 20:31:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:31,881 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-11-23 20:31:31,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:31:31,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-23 20:31:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:31,883 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:31:31,883 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:31:31,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 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 20:31:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:31:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 20:31:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:31:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-23 20:31:31,889 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2019-11-23 20:31:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:31,889 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-23 20:31:31,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:31:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-23 20:31:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:31:31,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:31,891 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:32,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:32,094 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash -880824069, now seen corresponding path program 6 times [2019-11-23 20:31:32,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:32,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493925885] [2019-11-23 20:31:32,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:31:32,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493925885] [2019-11-23 20:31:32,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085251569] [2019-11-23 20:31:32,190 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 20:31:32,244 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:31:32,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:32,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:31:32,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:31:32,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:32,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:31:32,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607331333] [2019-11-23 20:31:32,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:31:32,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:32,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:31:32,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:31:32,299 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 13 states. [2019-11-23 20:31:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:32,384 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2019-11-23 20:31:32,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:31:32,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2019-11-23 20:31:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:32,386 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:31:32,386 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:31:32,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 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 20:31:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:31:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-23 20:31:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:31:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-11-23 20:31:32,393 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 30 [2019-11-23 20:31:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:32,393 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-11-23 20:31:32,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:31:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-11-23 20:31:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:31:32,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:32,395 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:32,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:32,599 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:32,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1627529928, now seen corresponding path program 7 times [2019-11-23 20:31:32,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:32,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776469746] [2019-11-23 20:31:32,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:32,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776469746] [2019-11-23 20:31:32,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869435074] [2019-11-23 20:31:32,743 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 20:31:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:32,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:31:32,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:32,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:32,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:31:32,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363710701] [2019-11-23 20:31:32,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:31:32,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:31:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:32,825 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2019-11-23 20:31:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:32,887 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-11-23 20:31:32,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:31:32,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-11-23 20:31:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:32,889 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:31:32,889 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:31:32,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 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 20:31:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:31:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:31:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:31:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-23 20:31:32,895 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 35 [2019-11-23 20:31:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:32,895 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-23 20:31:32,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:31:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-23 20:31:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:31:32,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:32,896 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:33,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:33,102 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:33,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:33,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1639375226, now seen corresponding path program 8 times [2019-11-23 20:31:33,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:33,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669452057] [2019-11-23 20:31:33,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:33,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669452057] [2019-11-23 20:31:33,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180322536] [2019-11-23 20:31:33,248 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 20:31:33,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:33,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:33,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:31:33,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:33,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:33,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:31:33,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945772278] [2019-11-23 20:31:33,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:31:33,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:33,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:31:33,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:31:33,321 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 12 states. [2019-11-23 20:31:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:33,378 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-11-23 20:31:33,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:31:33,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-23 20:31:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:33,381 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:31:33,381 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:31:33,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 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 20:31:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:31:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 20:31:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:31:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-11-23 20:31:33,396 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 37 [2019-11-23 20:31:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:33,396 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-11-23 20:31:33,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:31:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-11-23 20:31:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:31:33,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:33,399 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:33,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:33,601 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1514134844, now seen corresponding path program 9 times [2019-11-23 20:31:33,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:33,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662679643] [2019-11-23 20:31:33,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:33,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662679643] [2019-11-23 20:31:33,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799487696] [2019-11-23 20:31:33,723 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 20:31:33,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:31:33,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:33,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:31:33,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:31:33,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:33,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:31:33,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844220133] [2019-11-23 20:31:33,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:31:33,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:33,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:31:33,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:33,827 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 17 states. [2019-11-23 20:31:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:33,898 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-11-23 20:31:33,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:31:33,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-11-23 20:31:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:33,899 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:31:33,900 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:31:33,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 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 20:31:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:31:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-11-23 20:31:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:31:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-11-23 20:31:33,906 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2019-11-23 20:31:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:33,906 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-11-23 20:31:33,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:31:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-11-23 20:31:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:31:33,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:33,907 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:34,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:34,111 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash -320565341, now seen corresponding path program 10 times [2019-11-23 20:31:34,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:34,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989039748] [2019-11-23 20:31:34,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:34,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989039748] [2019-11-23 20:31:34,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641164903] [2019-11-23 20:31:34,248 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 20:31:34,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:34,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:34,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:31:34,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:34,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:34,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:31:34,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803656454] [2019-11-23 20:31:34,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:31:34,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:31:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:31:34,329 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 14 states. [2019-11-23 20:31:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:34,387 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-11-23 20:31:34,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:31:34,388 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-11-23 20:31:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:34,388 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:31:34,388 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:31:34,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 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 20:31:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:31:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 20:31:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:31:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-11-23 20:31:34,395 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 44 [2019-11-23 20:31:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:34,396 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-11-23 20:31:34,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:31:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-11-23 20:31:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:31:34,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:34,397 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:34,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:34,601 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:34,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1899370075, now seen corresponding path program 11 times [2019-11-23 20:31:34,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:34,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106454413] [2019-11-23 20:31:34,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:34,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106454413] [2019-11-23 20:31:34,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361160486] [2019-11-23 20:31:34,732 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 [2019-11-23 20:31:34,822 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:31:34,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:34,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:31:34,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:34,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:34,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:31:34,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813166137] [2019-11-23 20:31:34,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:31:34,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:34,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:31:34,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:34,844 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 15 states. [2019-11-23 20:31:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:34,890 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-11-23 20:31:34,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:31:34,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2019-11-23 20:31:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:34,892 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:31:34,893 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:31:34,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:31:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-23 20:31:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:31:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-11-23 20:31:34,898 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 46 [2019-11-23 20:31:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:34,898 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-11-23 20:31:34,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:31:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-11-23 20:31:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:31:34,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:34,899 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:35,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,103 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1287703335, now seen corresponding path program 12 times [2019-11-23 20:31:35,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:35,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628795968] [2019-11-23 20:31:35,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:35,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628795968] [2019-11-23 20:31:35,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704547055] [2019-11-23 20:31:35,244 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,326 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:31:35,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:35,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:31:35,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:31:35,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:35,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-23 20:31:35,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395431832] [2019-11-23 20:31:35,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:31:35,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:35,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:31:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:31:35,410 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 21 states. [2019-11-23 20:31:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:35,509 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-11-23 20:31:35,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:31:35,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2019-11-23 20:31:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:35,510 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:31:35,511 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:31:35,511 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:31:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:31:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-11-23 20:31:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:31:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-11-23 20:31:35,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 48 [2019-11-23 20:31:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:35,519 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-11-23 20:31:35,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:31:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-11-23 20:31:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:31:35,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:35,520 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:35,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,724 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:35,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1180415388, now seen corresponding path program 13 times [2019-11-23 20:31:35,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:35,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580545455] [2019-11-23 20:31:35,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:35,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580545455] [2019-11-23 20:31:35,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002691478] [2019-11-23 20:31:35,905 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:35,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:31:35,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:35,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:35,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:31:35,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525383098] [2019-11-23 20:31:35,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:31:35,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:35,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:31:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:35,987 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 17 states. [2019-11-23 20:31:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:36,047 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2019-11-23 20:31:36,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:31:36,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2019-11-23 20:31:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:36,048 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:31:36,049 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:31:36,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:31:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-23 20:31:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:31:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-23 20:31:36,054 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 53 [2019-11-23 20:31:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:36,055 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-23 20:31:36,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:31:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-23 20:31:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:31:36,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:36,056 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:36,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:36,260 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1334936102, now seen corresponding path program 14 times [2019-11-23 20:31:36,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:36,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132695340] [2019-11-23 20:31:36,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:36,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132695340] [2019-11-23 20:31:36,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281262485] [2019-11-23 20:31:36,457 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:36,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:36,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:36,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:31:36,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:36,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:36,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:31:36,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349176102] [2019-11-23 20:31:36,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:31:36,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:31:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:31:36,538 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 18 states. [2019-11-23 20:31:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:36,607 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-11-23 20:31:36,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:31:36,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-11-23 20:31:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:36,610 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:31:36,610 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:31:36,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:31:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:31:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-23 20:31:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:31:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-11-23 20:31:36,617 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 55 [2019-11-23 20:31:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:36,617 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-11-23 20:31:36,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:31:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-11-23 20:31:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:31:36,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:36,618 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:36,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:36,819 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:36,820 INFO L82 PathProgramCache]: Analyzing trace with hash -521130344, now seen corresponding path program 15 times [2019-11-23 20:31:36,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:36,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208960562] [2019-11-23 20:31:36,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:37,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208960562] [2019-11-23 20:31:37,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66773398] [2019-11-23 20:31:37,051 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:31:37,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:37,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:31:37,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:31:37,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:37,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-23 20:31:37,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512664311] [2019-11-23 20:31:37,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:31:37,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:31:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:31:37,301 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 25 states. [2019-11-23 20:31:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:37,441 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2019-11-23 20:31:37,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:31:37,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2019-11-23 20:31:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:37,442 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:31:37,442 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:31:37,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:31:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:31:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2019-11-23 20:31:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:31:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2019-11-23 20:31:37,453 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 57 [2019-11-23 20:31:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:37,453 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2019-11-23 20:31:37,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:31:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2019-11-23 20:31:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:31:37,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:37,454 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:37,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,655 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash -230545713, now seen corresponding path program 16 times [2019-11-23 20:31:37,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:37,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026165583] [2019-11-23 20:31:37,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:37,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026165583] [2019-11-23 20:31:37,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66802328] [2019-11-23 20:31:37,840 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,891 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:37,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:37,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:31:37,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:37,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:37,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:31:37,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985658343] [2019-11-23 20:31:37,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:31:37,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:31:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:31:37,911 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 20 states. [2019-11-23 20:31:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:37,970 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2019-11-23 20:31:37,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:31:37,970 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-11-23 20:31:37,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:37,971 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:31:37,971 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:31:37,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:31:37,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:31:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-11-23 20:31:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:31:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2019-11-23 20:31:37,976 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 62 [2019-11-23 20:31:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:37,976 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2019-11-23 20:31:37,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:31:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2019-11-23 20:31:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:31:37,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:37,977 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:38,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:38,180 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1184482385, now seen corresponding path program 17 times [2019-11-23 20:31:38,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:38,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293283123] [2019-11-23 20:31:38,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:38,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293283123] [2019-11-23 20:31:38,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239276680] [2019-11-23 20:31:38,478 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:38,744 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:31:38,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:38,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:31:38,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:31:38,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:38,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2019-11-23 20:31:38,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870091133] [2019-11-23 20:31:38,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:31:38,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:31:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:31:38,876 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 28 states. [2019-11-23 20:31:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:39,031 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2019-11-23 20:31:39,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:31:39,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2019-11-23 20:31:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:39,032 INFO L225 Difference]: With dead ends: 105 [2019-11-23 20:31:39,032 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:31:39,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:31:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:31:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-11-23 20:31:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:31:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-11-23 20:31:39,042 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 64 [2019-11-23 20:31:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:39,042 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-11-23 20:31:39,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:31:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-11-23 20:31:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:31:39,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:39,046 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:39,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:39,250 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:39,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2089027534, now seen corresponding path program 18 times [2019-11-23 20:31:39,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:39,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002904320] [2019-11-23 20:31:39,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:39,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002904320] [2019-11-23 20:31:39,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108771424] [2019-11-23 20:31:39,485 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:39,645 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:31:39,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:39,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:31:39,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:31:39,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:39,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2019-11-23 20:31:39,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196299934] [2019-11-23 20:31:39,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:31:39,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:31:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:31:39,799 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 30 states. [2019-11-23 20:31:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:39,985 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2019-11-23 20:31:39,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:31:39,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2019-11-23 20:31:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:39,986 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:31:39,986 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:31:39,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:31:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:31:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2019-11-23 20:31:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:31:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-11-23 20:31:39,998 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 69 [2019-11-23 20:31:39,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:39,998 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-11-23 20:31:39,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:31:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-11-23 20:31:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:31:39,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:39,999 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:40,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,200 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:40,200 INFO L82 PathProgramCache]: Analyzing trace with hash -74396683, now seen corresponding path program 19 times [2019-11-23 20:31:40,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:40,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156687056] [2019-11-23 20:31:40,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:40,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156687056] [2019-11-23 20:31:40,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404681023] [2019-11-23 20:31:40,484 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:40,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:31:40,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:40,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:40,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:31:40,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852961035] [2019-11-23 20:31:40,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:31:40,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:31:40,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:31:40,563 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 23 states. [2019-11-23 20:31:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:40,614 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2019-11-23 20:31:40,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:31:40,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2019-11-23 20:31:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:40,616 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:31:40,616 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:31:40,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:31:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:31:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-23 20:31:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:31:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2019-11-23 20:31:40,620 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 74 [2019-11-23 20:31:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:40,621 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2019-11-23 20:31:40,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:31:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2019-11-23 20:31:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:31:40,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:40,622 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:40,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,828 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash -17942921, now seen corresponding path program 20 times [2019-11-23 20:31:40,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:40,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502469265] [2019-11-23 20:31:40,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:41,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502469265] [2019-11-23 20:31:41,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199571189] [2019-11-23 20:31:41,120 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:41,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:41,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:41,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:41,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:31:41,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560921093] [2019-11-23 20:31:41,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:31:41,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:31:41,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:31:41,205 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 24 states. [2019-11-23 20:31:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,270 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2019-11-23 20:31:41,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:31:41,271 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2019-11-23 20:31:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,271 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:31:41,272 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:31:41,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:31:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:31:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-23 20:31:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:31:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-11-23 20:31:41,276 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 76 [2019-11-23 20:31:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,276 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-11-23 20:31:41,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:31:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-11-23 20:31:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 20:31:41,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,277 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,485 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1600452487, now seen corresponding path program 21 times [2019-11-23 20:31:41,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607169413] [2019-11-23 20:31:41,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:41,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607169413] [2019-11-23 20:31:41,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907683397] [2019-11-23 20:31:41,778 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:31:41,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:41,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:31:42,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2019-11-23 20:31:42,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557707193] [2019-11-23 20:31:42,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:31:42,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:31:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:31:42,041 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 34 states. [2019-11-23 20:31:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,201 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2019-11-23 20:31:42,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:31:42,202 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2019-11-23 20:31:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,202 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:31:42,202 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:31:42,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:31:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:31:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-23 20:31:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:31:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2019-11-23 20:31:42,206 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 78 [2019-11-23 20:31:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,206 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2019-11-23 20:31:42,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:31:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2019-11-23 20:31:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:31:42,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,207 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,410 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash -754057590, now seen corresponding path program 22 times [2019-11-23 20:31:42,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158577116] [2019-11-23 20:31:42,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:42,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158577116] [2019-11-23 20:31:42,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037234722] [2019-11-23 20:31:42,729 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:42,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:42,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 20:31:42,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2019-11-23 20:31:42,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267793498] [2019-11-23 20:31:42,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:31:42,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:31:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:31:42,963 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 36 states. [2019-11-23 20:31:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:43,146 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2019-11-23 20:31:43,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:31:43,146 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2019-11-23 20:31:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:43,147 INFO L225 Difference]: With dead ends: 133 [2019-11-23 20:31:43,147 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:31:43,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:31:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:31:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2019-11-23 20:31:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 20:31:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2019-11-23 20:31:43,150 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 83 [2019-11-23 20:31:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:43,150 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2019-11-23 20:31:43,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:31:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2019-11-23 20:31:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:31:43,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:43,151 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:43,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,355 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:43,356 INFO L82 PathProgramCache]: Analyzing trace with hash -77685987, now seen corresponding path program 23 times [2019-11-23 20:31:43,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:43,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657726718] [2019-11-23 20:31:43,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:43,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657726718] [2019-11-23 20:31:43,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772362371] [2019-11-23 20:31:43,638 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,978 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:31:43,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:43,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:31:43,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:31:44,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:44,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2019-11-23 20:31:44,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165319989] [2019-11-23 20:31:44,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:31:44,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:44,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:31:44,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:31:44,253 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 38 states. [2019-11-23 20:31:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:44,452 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2019-11-23 20:31:44,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:31:44,454 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2019-11-23 20:31:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:44,456 INFO L225 Difference]: With dead ends: 141 [2019-11-23 20:31:44,456 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:31:44,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:31:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:31:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-11-23 20:31:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:31:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2019-11-23 20:31:44,460 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 88 [2019-11-23 20:31:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:44,461 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2019-11-23 20:31:44,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:31:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2019-11-23 20:31:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:31:44,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:44,462 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:44,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:44,667 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:44,667 INFO L82 PathProgramCache]: Analyzing trace with hash -182696986, now seen corresponding path program 24 times [2019-11-23 20:31:44,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:44,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398019224] [2019-11-23 20:31:44,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:45,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398019224] [2019-11-23 20:31:45,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807984349] [2019-11-23 20:31:45,016 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:46,879 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:31:46,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:46,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:31:46,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:46,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:46,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:31:46,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569097662] [2019-11-23 20:31:46,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:31:46,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:46,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:31:46,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:31:46,905 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 28 states. [2019-11-23 20:31:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:47,012 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2019-11-23 20:31:47,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:31:47,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 93 [2019-11-23 20:31:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:47,014 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:31:47,014 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:31:47,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:31:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:31:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-23 20:31:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:31:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2019-11-23 20:31:47,019 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 93 [2019-11-23 20:31:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:47,019 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2019-11-23 20:31:47,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:31:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2019-11-23 20:31:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:31:47,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:47,020 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:47,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:47,226 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1785629148, now seen corresponding path program 25 times [2019-11-23 20:31:47,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:47,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234111367] [2019-11-23 20:31:47,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:47,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234111367] [2019-11-23 20:31:47,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721265782] [2019-11-23 20:31:47,588 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:47,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:31:47,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:47,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:47,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:31:47,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595682244] [2019-11-23 20:31:47,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:31:47,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:31:47,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:47,673 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 29 states. [2019-11-23 20:31:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:47,765 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2019-11-23 20:31:47,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:31:47,769 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2019-11-23 20:31:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:47,770 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:31:47,770 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 20:31:47,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 20:31:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-11-23 20:31:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:31:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2019-11-23 20:31:47,774 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 95 [2019-11-23 20:31:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:47,774 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2019-11-23 20:31:47,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:31:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2019-11-23 20:31:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:31:47,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:47,775 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:47,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:47,978 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash -310177566, now seen corresponding path program 26 times [2019-11-23 20:31:47,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:47,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600141188] [2019-11-23 20:31:47,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:48,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600141188] [2019-11-23 20:31:48,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49872541] [2019-11-23 20:31:48,352 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:48,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:48,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:48,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:31:48,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:48,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:48,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:31:48,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717454188] [2019-11-23 20:31:48,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:31:48,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:48,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:31:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:31:48,450 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 30 states. [2019-11-23 20:31:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:48,533 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2019-11-23 20:31:48,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:31:48,533 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2019-11-23 20:31:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:48,534 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:31:48,534 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 20:31:48,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:31:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 20:31:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-11-23 20:31:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:31:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2019-11-23 20:31:48,540 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 97 [2019-11-23 20:31:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:48,541 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2019-11-23 20:31:48,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:31:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2019-11-23 20:31:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:31:48,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:48,542 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:48,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:48,747 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:48,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:48,747 INFO L82 PathProgramCache]: Analyzing trace with hash 259585056, now seen corresponding path program 27 times [2019-11-23 20:31:48,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:48,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057289523] [2019-11-23 20:31:48,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:49,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057289523] [2019-11-23 20:31:49,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499384406] [2019-11-23 20:31:49,111 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:49,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-11-23 20:31:49,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:49,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:31:49,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 20:31:49,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:49,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2019-11-23 20:31:49,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911313266] [2019-11-23 20:31:49,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:31:49,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:49,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:31:49,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:31:49,452 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 43 states. [2019-11-23 20:31:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:49,684 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2019-11-23 20:31:49,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:31:49,684 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 99 [2019-11-23 20:31:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:49,685 INFO L225 Difference]: With dead ends: 155 [2019-11-23 20:31:49,686 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:31:49,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:31:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:31:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2019-11-23 20:31:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 20:31:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2019-11-23 20:31:49,691 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 99 [2019-11-23 20:31:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:49,691 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2019-11-23 20:31:49,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:31:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2019-11-23 20:31:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:31:49,692 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:49,692 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:49,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:49,896 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 877425095, now seen corresponding path program 28 times [2019-11-23 20:31:49,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:49,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117089187] [2019-11-23 20:31:49,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:31:50,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117089187] [2019-11-23 20:31:50,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164567636] [2019-11-23 20:31:50,431 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:50,521 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:50,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:50,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:31:50,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:31:50,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:50,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:31:50,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919272659] [2019-11-23 20:31:50,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:31:50,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:31:50,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:31:50,567 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand 32 states. [2019-11-23 20:31:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:50,695 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2019-11-23 20:31:50,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:31:50,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 104 [2019-11-23 20:31:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:50,697 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:31:50,697 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:31:50,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:31:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:31:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-23 20:31:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-23 20:31:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2019-11-23 20:31:50,702 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 104 [2019-11-23 20:31:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:50,703 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2019-11-23 20:31:50,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:31:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2019-11-23 20:31:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 20:31:50,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:50,704 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:50,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:50,908 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:50,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1207300919, now seen corresponding path program 29 times [2019-11-23 20:31:50,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:50,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628267096] [2019-11-23 20:31:50,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:31:51,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628267096] [2019-11-23 20:31:51,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59581361] [2019-11-23 20:31:51,497 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:52,388 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:31:52,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:52,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:31:52,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:31:52,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:52,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 46 [2019-11-23 20:31:52,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657007029] [2019-11-23 20:31:52,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:31:52,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:52,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:31:52,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:31:52,673 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 46 states. [2019-11-23 20:31:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:52,898 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2019-11-23 20:31:52,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:31:52,899 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 106 [2019-11-23 20:31:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:52,899 INFO L225 Difference]: With dead ends: 165 [2019-11-23 20:31:52,899 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:31:52,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:31:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:31:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2019-11-23 20:31:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:31:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2019-11-23 20:31:52,905 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 106 [2019-11-23 20:31:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:52,905 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2019-11-23 20:31:52,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:31:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2019-11-23 20:31:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:31:52,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:52,906 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:53,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:53,107 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1187401926, now seen corresponding path program 30 times [2019-11-23 20:31:53,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:53,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039137349] [2019-11-23 20:31:53,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:31:53,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039137349] [2019-11-23 20:31:53,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365243832] [2019-11-23 20:31:53,628 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:54,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-11-23 20:31:54,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:54,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:31:54,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 20:31:54,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:54,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2019-11-23 20:31:54,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682078561] [2019-11-23 20:31:54,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:31:54,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:31:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:31:54,922 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand 48 states. [2019-11-23 20:31:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:55,094 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2019-11-23 20:31:55,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:31:55,094 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 111 [2019-11-23 20:31:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:55,095 INFO L225 Difference]: With dead ends: 173 [2019-11-23 20:31:55,095 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 20:31:55,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:31:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 20:31:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2019-11-23 20:31:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-23 20:31:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2019-11-23 20:31:55,100 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 111 [2019-11-23 20:31:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:55,100 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2019-11-23 20:31:55,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:31:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2019-11-23 20:31:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-23 20:31:55,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:55,101 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:55,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:55,303 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1343124845, now seen corresponding path program 31 times [2019-11-23 20:31:55,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:55,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082200156] [2019-11-23 20:31:55,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:31:55,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082200156] [2019-11-23 20:31:55,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443463490] [2019-11-23 20:31:55,846 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:55,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:31:55,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:31:55,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:55,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:31:55,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973284216] [2019-11-23 20:31:55,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:31:55,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:31:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:31:55,951 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 35 states. [2019-11-23 20:31:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:56,067 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2019-11-23 20:31:56,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:31:56,069 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 116 [2019-11-23 20:31:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:56,070 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:31:56,070 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 20:31:56,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:31:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 20:31:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-11-23 20:31:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-23 20:31:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2019-11-23 20:31:56,078 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 116 [2019-11-23 20:31:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:56,078 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2019-11-23 20:31:56,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:31:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2019-11-23 20:31:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-23 20:31:56,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:56,079 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:56,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:56,280 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1380031855, now seen corresponding path program 32 times [2019-11-23 20:31:56,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:56,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022747288] [2019-11-23 20:31:56,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:31:57,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022747288] [2019-11-23 20:31:57,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74721758] [2019-11-23 20:31:57,115 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:57,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:57,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:57,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:31:57,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:31:57,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:57,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:31:57,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969108087] [2019-11-23 20:31:57,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:31:57,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:57,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:31:57,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:31:57,268 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 36 states. [2019-11-23 20:31:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:57,395 INFO L93 Difference]: Finished difference Result 178 states and 212 transitions. [2019-11-23 20:31:57,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:31:57,396 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 118 [2019-11-23 20:31:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:57,397 INFO L225 Difference]: With dead ends: 178 [2019-11-23 20:31:57,397 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 20:31:57,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:31:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 20:31:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2019-11-23 20:31:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-23 20:31:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2019-11-23 20:31:57,408 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 118 [2019-11-23 20:31:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:57,408 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2019-11-23 20:31:57,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:31:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2019-11-23 20:31:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-23 20:31:57,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:57,410 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:57,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:57,611 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1807037199, now seen corresponding path program 33 times [2019-11-23 20:31:57,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:57,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033057571] [2019-11-23 20:31:57,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:31:58,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033057571] [2019-11-23 20:31:58,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966842758] [2019-11-23 20:31:58,197 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:58,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:31:58,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:58,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:31:58,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-11-23 20:31:58,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:58,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2019-11-23 20:31:58,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053698604] [2019-11-23 20:31:58,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:31:58,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:58,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:31:58,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:31:58,976 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand 52 states. [2019-11-23 20:31:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:59,242 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2019-11-23 20:31:59,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:31:59,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 120 [2019-11-23 20:31:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:59,244 INFO L225 Difference]: With dead ends: 185 [2019-11-23 20:31:59,244 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:31:59,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:31:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:31:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2019-11-23 20:31:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 20:31:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2019-11-23 20:31:59,251 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 120 [2019-11-23 20:31:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:59,252 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2019-11-23 20:31:59,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:31:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2019-11-23 20:31:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:31:59,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:59,253 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:59,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:59,458 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1399826030, now seen corresponding path program 34 times [2019-11-23 20:31:59,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:59,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282694321] [2019-11-23 20:31:59,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:00,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282694321] [2019-11-23 20:32:00,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238076349] [2019-11-23 20:32:00,023 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:00,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:00,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:00,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:32:00,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:00,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:00,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:32:00,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614509218] [2019-11-23 20:32:00,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:32:00,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:00,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:32:00,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:32:00,158 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand 38 states. [2019-11-23 20:32:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:00,291 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2019-11-23 20:32:00,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:32:00,291 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 125 [2019-11-23 20:32:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:00,292 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:32:00,293 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:32:00,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:32:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:32:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-23 20:32:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 20:32:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2019-11-23 20:32:00,297 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 125 [2019-11-23 20:32:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:00,297 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2019-11-23 20:32:00,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:32:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2019-11-23 20:32:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 20:32:00,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:00,298 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:00,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:00,502 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:00,502 INFO L82 PathProgramCache]: Analyzing trace with hash -704834608, now seen corresponding path program 35 times [2019-11-23 20:32:00,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:00,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219542758] [2019-11-23 20:32:00,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219542758] [2019-11-23 20:32:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600622241] [2019-11-23 20:32:01,080 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:02,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:32:02,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:02,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:32:02,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:02,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:02,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:32:02,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338912283] [2019-11-23 20:32:02,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:32:02,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:32:02,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:32:02,845 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand 39 states. [2019-11-23 20:32:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:02,929 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2019-11-23 20:32:02,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:32:02,930 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 127 [2019-11-23 20:32:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:02,931 INFO L225 Difference]: With dead ends: 190 [2019-11-23 20:32:02,931 INFO L226 Difference]: Without dead ends: 133 [2019-11-23 20:32:02,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:32:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-23 20:32:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-11-23 20:32:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-23 20:32:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2019-11-23 20:32:02,936 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 127 [2019-11-23 20:32:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:02,936 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2019-11-23 20:32:02,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:32:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2019-11-23 20:32:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 20:32:02,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:02,937 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:03,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:03,145 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:03,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1461991054, now seen corresponding path program 36 times [2019-11-23 20:32:03,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:03,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272429964] [2019-11-23 20:32:03,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:04,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272429964] [2019-11-23 20:32:04,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655266773] [2019-11-23 20:32:04,161 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:12,505 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2019-11-23 20:32:12,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:12,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:32:12,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2019-11-23 20:32:12,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:12,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 19] total 56 [2019-11-23 20:32:12,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103018062] [2019-11-23 20:32:12,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:32:12,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:12,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:32:12,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:32:12,903 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand 56 states. [2019-11-23 20:32:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:13,196 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2019-11-23 20:32:13,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:32:13,196 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 129 [2019-11-23 20:32:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:13,197 INFO L225 Difference]: With dead ends: 197 [2019-11-23 20:32:13,197 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:32:13,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:32:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:32:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2019-11-23 20:32:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-23 20:32:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2019-11-23 20:32:13,203 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 129 [2019-11-23 20:32:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:13,204 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2019-11-23 20:32:13,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:32:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2019-11-23 20:32:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-23 20:32:13,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:13,205 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:13,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:13,405 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash 975069465, now seen corresponding path program 37 times [2019-11-23 20:32:13,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:13,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961970562] [2019-11-23 20:32:13,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:14,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961970562] [2019-11-23 20:32:14,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986157480] [2019-11-23 20:32:14,342 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:14,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:32:14,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:14,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:14,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:32:14,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107272839] [2019-11-23 20:32:14,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:32:14,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:14,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:32:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:32:14,466 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand 41 states. [2019-11-23 20:32:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:14,620 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2019-11-23 20:32:14,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:32:14,625 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2019-11-23 20:32:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:14,626 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:32:14,626 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:32:14,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:32:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:32:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-11-23 20:32:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-23 20:32:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2019-11-23 20:32:14,631 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 134 [2019-11-23 20:32:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:14,631 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2019-11-23 20:32:14,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:32:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2019-11-23 20:32:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 20:32:14,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:14,632 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:14,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:14,835 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:14,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1881951387, now seen corresponding path program 38 times [2019-11-23 20:32:14,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:14,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890948836] [2019-11-23 20:32:14,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:15,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890948836] [2019-11-23 20:32:15,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261191331] [2019-11-23 20:32:15,501 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:15,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:15,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:15,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:32:15,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:15,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:15,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:32:15,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998736378] [2019-11-23 20:32:15,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:32:15,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:15,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:32:15,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:32:15,627 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand 42 states. [2019-11-23 20:32:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:15,745 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2019-11-23 20:32:15,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:32:15,747 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 136 [2019-11-23 20:32:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:15,748 INFO L225 Difference]: With dead ends: 202 [2019-11-23 20:32:15,748 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 20:32:15,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:32:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 20:32:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2019-11-23 20:32:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-23 20:32:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2019-11-23 20:32:15,752 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 136 [2019-11-23 20:32:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:15,752 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2019-11-23 20:32:15,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:32:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2019-11-23 20:32:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-23 20:32:15,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:15,753 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:15,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:15,957 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1517117341, now seen corresponding path program 39 times [2019-11-23 20:32:15,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:15,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786281154] [2019-11-23 20:32:15,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:16,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786281154] [2019-11-23 20:32:16,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748663342] [2019-11-23 20:32:16,632 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:17,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 20:32:17,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:17,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:32:17,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2019-11-23 20:32:17,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:17,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 20] total 60 [2019-11-23 20:32:17,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167329021] [2019-11-23 20:32:17,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-11-23 20:32:17,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-11-23 20:32:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:32:17,493 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand 60 states. [2019-11-23 20:32:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:17,805 INFO L93 Difference]: Finished difference Result 209 states and 250 transitions. [2019-11-23 20:32:17,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-23 20:32:17,805 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2019-11-23 20:32:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:17,807 INFO L225 Difference]: With dead ends: 209 [2019-11-23 20:32:17,807 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:32:17,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:32:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:32:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2019-11-23 20:32:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:32:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2019-11-23 20:32:17,811 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 138 [2019-11-23 20:32:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:17,812 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2019-11-23 20:32:17,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-11-23 20:32:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2019-11-23 20:32:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 20:32:17,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:17,813 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:18,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:18,017 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash -159054874, now seen corresponding path program 40 times [2019-11-23 20:32:18,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:18,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257564935] [2019-11-23 20:32:18,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 20:32:18,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257564935] [2019-11-23 20:32:18,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311152448] [2019-11-23 20:32:18,714 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:18,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:18,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:18,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:32:18,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 20:32:19,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:19,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 21] total 62 [2019-11-23 20:32:19,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836633615] [2019-11-23 20:32:19,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-11-23 20:32:19,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-11-23 20:32:19,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:32:19,308 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand 62 states. [2019-11-23 20:32:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:19,612 INFO L93 Difference]: Finished difference Result 217 states and 260 transitions. [2019-11-23 20:32:19,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-11-23 20:32:19,612 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 143 [2019-11-23 20:32:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:19,614 INFO L225 Difference]: With dead ends: 217 [2019-11-23 20:32:19,614 INFO L226 Difference]: Without dead ends: 154 [2019-11-23 20:32:19,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:32:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-11-23 20:32:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2019-11-23 20:32:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-23 20:32:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2019-11-23 20:32:19,621 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 143 [2019-11-23 20:32:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:19,621 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2019-11-23 20:32:19,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-11-23 20:32:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2019-11-23 20:32:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-23 20:32:19,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:19,622 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:19,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:19,826 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:19,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1007793855, now seen corresponding path program 41 times [2019-11-23 20:32:19,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:19,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125122629] [2019-11-23 20:32:19,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:32:20,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125122629] [2019-11-23 20:32:20,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838222766] [2019-11-23 20:32:20,591 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:23,138 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2019-11-23 20:32:23,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:23,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:32:23,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:32:23,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:23,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 20:32:23,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559587402] [2019-11-23 20:32:23,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:32:23,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:32:23,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:32:23,179 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 45 states. [2019-11-23 20:32:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:23,324 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2019-11-23 20:32:23,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:32:23,324 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 148 [2019-11-23 20:32:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:23,326 INFO L225 Difference]: With dead ends: 220 [2019-11-23 20:32:23,326 INFO L226 Difference]: Without dead ends: 154 [2019-11-23 20:32:23,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:32:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-11-23 20:32:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2019-11-23 20:32:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-23 20:32:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2019-11-23 20:32:23,332 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 148 [2019-11-23 20:32:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:23,332 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2019-11-23 20:32:23,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:32:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2019-11-23 20:32:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-23 20:32:23,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:23,334 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:23,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:23,542 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash -349116093, now seen corresponding path program 42 times [2019-11-23 20:32:23,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:23,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270331996] [2019-11-23 20:32:23,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:32:24,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270331996] [2019-11-23 20:32:24,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53756112] [2019-11-23 20:32:24,362 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:51,025 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2019-11-23 20:32:51,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:51,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:32:51,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2019-11-23 20:32:51,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:51,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22] total 65 [2019-11-23 20:32:51,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244049773] [2019-11-23 20:32:51,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 20:32:51,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:51,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 20:32:51,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:32:51,596 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand 65 states. [2019-11-23 20:32:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:51,865 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2019-11-23 20:32:51,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-23 20:32:51,865 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 150 [2019-11-23 20:32:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:51,867 INFO L225 Difference]: With dead ends: 227 [2019-11-23 20:32:51,867 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:32:51,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:32:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:32:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2019-11-23 20:32:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 20:32:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2019-11-23 20:32:51,873 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 150 [2019-11-23 20:32:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:51,873 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2019-11-23 20:32:51,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 20:32:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2019-11-23 20:32:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:32:51,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:51,874 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:52,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:52,085 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1604131968, now seen corresponding path program 43 times [2019-11-23 20:32:52,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:52,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063471136] [2019-11-23 20:32:52,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:32:52,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063471136] [2019-11-23 20:32:52,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851575086] [2019-11-23 20:32:52,906 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:53,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:32:53,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:32:53,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:53,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-11-23 20:32:53,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942174257] [2019-11-23 20:32:53,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:32:53,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:32:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:32:53,062 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 47 states. [2019-11-23 20:32:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:53,205 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2019-11-23 20:32:53,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:32:53,206 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 155 [2019-11-23 20:32:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:53,208 INFO L225 Difference]: With dead ends: 230 [2019-11-23 20:32:53,208 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:32:53,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:32:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:32:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 20:32:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:32:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2019-11-23 20:32:53,212 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 155 [2019-11-23 20:32:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:53,213 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2019-11-23 20:32:53,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:32:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2019-11-23 20:32:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 20:32:53,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:53,214 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:53,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:53,417 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1230070466, now seen corresponding path program 44 times [2019-11-23 20:32:53,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:53,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351580710] [2019-11-23 20:32:53,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:32:54,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351580710] [2019-11-23 20:32:54,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605154993] [2019-11-23 20:32:54,359 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:54,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:54,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:54,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:32:54,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:32:54,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:54,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-11-23 20:32:54,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664162175] [2019-11-23 20:32:54,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:32:54,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:32:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:32:54,484 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 48 states. [2019-11-23 20:32:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:54,637 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2019-11-23 20:32:54,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:32:54,638 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 157 [2019-11-23 20:32:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:54,639 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:32:54,639 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:32:54,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:32:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:32:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:32:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:32:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2019-11-23 20:32:54,644 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 157 [2019-11-23 20:32:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:54,644 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2019-11-23 20:32:54,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:32:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2019-11-23 20:32:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:32:54,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:54,646 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:54,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:54,849 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:54,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1760747388, now seen corresponding path program 45 times [2019-11-23 20:32:54,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:54,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934150057] [2019-11-23 20:32:54,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:32:55,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934150057] [2019-11-23 20:32:55,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494915162] [2019-11-23 20:32:55,835 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:56,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 20:32:56,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:56,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:32:56,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2019-11-23 20:32:57,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:57,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 23] total 69 [2019-11-23 20:32:57,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847130406] [2019-11-23 20:32:57,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-23 20:32:57,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-23 20:32:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 20:32:57,230 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 69 states. [2019-11-23 20:32:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:57,634 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2019-11-23 20:32:57,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-23 20:32:57,634 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 159 [2019-11-23 20:32:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:57,636 INFO L225 Difference]: With dead ends: 239 [2019-11-23 20:32:57,636 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:32:57,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 20:32:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:32:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2019-11-23 20:32:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-23 20:32:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2019-11-23 20:32:57,646 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 159 [2019-11-23 20:32:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:57,646 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2019-11-23 20:32:57,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-23 20:32:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2019-11-23 20:32:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 20:32:57,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:57,648 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:57,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:57,857 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 872774123, now seen corresponding path program 46 times [2019-11-23 20:32:57,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:57,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799958670] [2019-11-23 20:32:57,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:32:58,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799958670] [2019-11-23 20:32:58,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383794175] [2019-11-23 20:32:58,824 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,921 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:58,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:58,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:32:58,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2019-11-23 20:32:59,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:59,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 24] total 71 [2019-11-23 20:32:59,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744977249] [2019-11-23 20:32:59,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-11-23 20:32:59,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:59,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-11-23 20:32:59,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 20:32:59,530 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand 71 states. [2019-11-23 20:32:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:59,931 INFO L93 Difference]: Finished difference Result 247 states and 296 transitions. [2019-11-23 20:32:59,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-11-23 20:32:59,931 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 164 [2019-11-23 20:32:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:59,932 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:32:59,932 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 20:32:59,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 20:32:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 20:32:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2019-11-23 20:32:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:32:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2019-11-23 20:32:59,939 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 164 [2019-11-23 20:32:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:59,940 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2019-11-23 20:32:59,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-11-23 20:32:59,940 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2019-11-23 20:32:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 20:32:59,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:59,941 INFO L410 BasicCegarLoop]: trace histogram [47, 47, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:00,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:00,145 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1899844264, now seen corresponding path program 47 times [2019-11-23 20:33:00,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:00,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940079893] [2019-11-23 20:33:00,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 20:33:01,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940079893] [2019-11-23 20:33:01,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437871248] [2019-11-23 20:33:01,072 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true