/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/reducercommutativity/sum20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:29:44,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:29:44,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:29:44,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:29:44,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:29:44,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:29:44,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:29:44,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:29:44,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:29:44,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:29:44,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:29:44,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:29:44,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:29:44,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:29:44,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:29:44,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:29:44,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:29:44,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:29:44,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:29:44,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:29:44,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:29:44,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:29:44,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:29:44,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:29:44,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:29:44,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:29:44,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:29:44,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:29:44,231 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 22:29:44,244 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:29:44,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:29:44,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:29:44,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:29:44,246 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:29:44,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:29:44,246 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:29:44,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:29:44,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:29:44,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:29:44,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:29:44,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:29:44,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:29:44,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:29:44,248 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:29:44,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:29:44,248 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:29:44,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:29:44,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:29:44,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:29:44,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:29:44,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:29:44,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:29:44,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:29:44,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:29:44,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:29:44,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:29:44,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:29:44,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:29:44,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:29:44,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:29:44,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:29:44,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:29:44,546 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:29:44,546 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:29:44,547 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum20-2.i [2019-11-23 22:29:44,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf2002d6/aba15b5c6ece43438310a039b1b9a25a/FLAG963ecc958 [2019-11-23 22:29:45,088 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:29:45,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum20-2.i [2019-11-23 22:29:45,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf2002d6/aba15b5c6ece43438310a039b1b9a25a/FLAG963ecc958 [2019-11-23 22:29:45,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf2002d6/aba15b5c6ece43438310a039b1b9a25a [2019-11-23 22:29:45,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:29:45,461 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:29:45,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:45,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:29:45,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:29:45,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e542d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45, skipping insertion in model container [2019-11-23 22:29:45,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:29:45,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:29:45,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:45,717 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:29:45,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:45,755 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:29:45,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45 WrapperNode [2019-11-23 22:29:45,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:45,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:45,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:29:45,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:29:45,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:45,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:29:45,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:29:45,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:29:45,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:29:45,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:29:45,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:29:45,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:29:45,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (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 22:29:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:29:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:29:45,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:29:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:29:46,294 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:29:46,294 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:29:46,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:46 BoogieIcfgContainer [2019-11-23 22:29:46,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:29:46,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:29:46,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:29:46,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:29:46,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:29:45" (1/3) ... [2019-11-23 22:29:46,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6217313e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:46, skipping insertion in model container [2019-11-23 22:29:46,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (2/3) ... [2019-11-23 22:29:46,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6217313e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:46, skipping insertion in model container [2019-11-23 22:29:46,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:46" (3/3) ... [2019-11-23 22:29:46,310 INFO L109 eAbstractionObserver]: Analyzing ICFG sum20-2.i [2019-11-23 22:29:46,321 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:29:46,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:29:46,337 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:29:46,359 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:29:46,359 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:29:46,359 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:29:46,359 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:29:46,359 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:29:46,360 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:29:46,360 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:29:46,360 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:29:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:29:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:29:46,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,379 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,379 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:29:46,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318112566] [2019-11-23 22:29:46,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:46,534 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 22:29:46,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318112566] [2019-11-23 22:29:46,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:46,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:46,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234587760] [2019-11-23 22:29:46,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:46,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:46,554 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:29:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:46,590 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:29:46,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:46,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:29:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:46,602 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:29:46,602 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:29:46,605 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 22:29:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:29:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:29:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:29:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:29:46,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:29:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:46,635 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:29:46,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:29:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:29:46,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,637 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,637 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:29:46,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773175645] [2019-11-23 22:29:46,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:46,704 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 22:29:46,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773175645] [2019-11-23 22:29:46,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:46,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:46,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597424912] [2019-11-23 22:29:46,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:46,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:46,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:46,711 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:29:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:46,760 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:29:46,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:46,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:29:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:46,763 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:29:46,763 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:29:46,764 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 22:29:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:29:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:29:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:29:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:29:46,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:29:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:46,772 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:29:46,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:29:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:29:46,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,774 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:29:46,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649846060] [2019-11-23 22:29:46,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:46,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649846060] [2019-11-23 22:29:46,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:46,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:46,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564476393] [2019-11-23 22:29:46,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:46,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:46,869 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:29:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:46,886 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:29:46,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:46,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:29:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:46,888 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:29:46,888 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:29:46,890 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 22:29:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:29:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:29:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:29:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:29:46,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:29:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:46,898 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:29:46,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:29:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:29:46,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,901 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,901 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:29:46,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830455331] [2019-11-23 22:29:46,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830455331] [2019-11-23 22:29:47,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653583801] [2019-11-23 22:29:47,007 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 22:29:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:29:47,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607706431] [2019-11-23 22:29:47,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:29:47,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:29:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:29:47,114 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:29:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,141 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:29:47,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:29:47,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:29:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,142 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:29:47,143 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:29:47,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 22:29:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:29:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:29:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:29:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:29:47,149 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:29:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,150 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:29:47,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:29:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:29:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:29:47,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,151 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:47,363 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:29:47,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562820495] [2019-11-23 22:29:47,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562820495] [2019-11-23 22:29:47,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291304553] [2019-11-23 22:29:47,443 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 22:29:47,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:47,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:47,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:47,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:29:47,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133364343] [2019-11-23 22:29:47,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:29:47,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:29:47,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:47,565 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:29:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,618 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:29:47,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:29:47,619 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:29:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,620 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:29:47,620 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:29:47,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:29:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:29:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:29:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:29:47,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:29:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,627 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:29:47,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:29:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:29:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:29:47,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,628 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:47,829 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:29:47,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115931156] [2019-11-23 22:29:47,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:47,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115931156] [2019-11-23 22:29:47,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530745158] [2019-11-23 22:29:47,941 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 22:29:48,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:29:48,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:29:48,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:29:48,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045090352] [2019-11-23 22:29:48,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:29:48,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:29:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:48,049 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:29:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,149 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:29:48,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:29:48,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:29:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,150 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:29:48,150 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:29:48,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 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 22:29:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:29:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:29:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:29:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:29:48,166 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:29:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,167 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:29:48,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:29:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:29:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:29:48,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,168 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:48,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,369 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:29:48,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669134708] [2019-11-23 22:29:48,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:29:48,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669134708] [2019-11-23 22:29:48,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391052193] [2019-11-23 22:29:48,477 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 22:29:48,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:48,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:29:48,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:29:48,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418359335] [2019-11-23 22:29:48,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:29:48,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:29:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:48,567 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:29:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,692 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 22:29:48,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:48,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:29:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,694 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:29:48,695 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:29:48,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:29:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 22:29:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:29:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:29:48,708 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:29:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,710 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:29:48,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:29:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:29:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:29:48,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,715 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:48,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,916 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:29:48,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336258919] [2019-11-23 22:29:48,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:29:49,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336258919] [2019-11-23 22:29:49,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869804196] [2019-11-23 22:29:49,086 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 22:29:49,166 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:29:49,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:49,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:29:49,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:49,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:29:49,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125390334] [2019-11-23 22:29:49,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:49,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:49,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:49,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,241 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 22:29:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:49,342 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 22:29:49,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:49,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 22:29:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:49,343 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:29:49,343 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:29:49,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:29:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:29:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:29:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:29:49,356 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:29:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:49,356 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:29:49,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:29:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:29:49,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:49,357 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:49,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,559 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:49,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:49,559 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 22:29:49,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:49,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358897026] [2019-11-23 22:29:49,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:29:49,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358897026] [2019-11-23 22:29:49,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281449918] [2019-11-23 22:29:49,684 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 22:29:49,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:29:49,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:49,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 22:29:49,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:49,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 22:29:49,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173897000] [2019-11-23 22:29:49,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:49,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,799 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 22:29:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:49,856 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 22:29:49,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:49,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 22:29:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:49,858 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:29:49,858 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:29:49,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:29:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 22:29:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:29:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 22:29:49,870 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 22:29:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:49,871 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 22:29:49,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 22:29:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:29:49,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:49,872 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:50,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,077 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 22:29:50,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:50,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537808414] [2019-11-23 22:29:50,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:50,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537808414] [2019-11-23 22:29:50,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322749964] [2019-11-23 22:29:50,262 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 22:29:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:29:50,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:50,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:50,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:29:50,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707646594] [2019-11-23 22:29:50,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:29:50,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:50,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:29:50,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:50,362 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 22:29:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:50,399 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 22:29:50,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:50,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:29:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:50,401 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:29:50,401 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:29:50,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:29:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 22:29:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:29:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:29:50,413 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 22:29:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:50,414 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:29:50,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:29:50,416 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:29:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:29:50,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:50,424 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:50,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,625 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 22:29:50,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:50,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003824359] [2019-11-23 22:29:50,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:50,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003824359] [2019-11-23 22:29:50,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230124017] [2019-11-23 22:29:50,746 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 22:29:50,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:50,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:50,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:29:50,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:50,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:50,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:29:50,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992052930] [2019-11-23 22:29:50,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:50,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:50,837 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 22:29:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:50,880 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 22:29:50,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:29:50,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 22:29:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:50,881 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:29:50,881 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:29:50,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 22:29:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:29:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:29:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:29:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:29:50,888 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:29:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:50,888 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:29:50,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:29:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:29:50,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:50,890 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:51,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,093 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:51,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 22:29:51,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:51,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637648657] [2019-11-23 22:29:51,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637648657] [2019-11-23 22:29:51,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5575430] [2019-11-23 22:29:51,221 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 22:29:51,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:29:51,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:51,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 22:29:51,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 22:29:51,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428090356] [2019-11-23 22:29:51,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:29:51,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:29:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:51,350 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 22:29:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:51,433 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 22:29:51,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:51,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 22:29:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:51,434 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:29:51,434 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:29:51,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:29:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 22:29:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:29:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 22:29:51,441 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 22:29:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:51,442 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 22:29:51,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:29:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 22:29:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:29:51,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:51,443 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:51,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,647 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 22:29:51,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:51,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164365904] [2019-11-23 22:29:51,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:51,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164365904] [2019-11-23 22:29:51,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604707640] [2019-11-23 22:29:51,767 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 22:29:51,825 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:51,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:51,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:51,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:29:51,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018379107] [2019-11-23 22:29:51,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:29:51,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:29:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:29:51,858 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 22:29:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:51,911 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 22:29:51,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:29:51,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 22:29:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:51,913 INFO L225 Difference]: With dead ends: 120 [2019-11-23 22:29:51,913 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:29:51,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 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 22:29:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:29:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 22:29:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:29:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 22:29:51,919 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 22:29:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:51,919 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 22:29:51,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:29:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 22:29:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:29:51,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:51,920 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:52,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,124 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 22:29:52,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:52,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390387868] [2019-11-23 22:29:52,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:52,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390387868] [2019-11-23 22:29:52,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587957279] [2019-11-23 22:29:52,276 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 22:29:52,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:29:52,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:52,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:52,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 22:29:52,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:52,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 22:29:52,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038127129] [2019-11-23 22:29:52,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:29:52,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:52,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:29:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:52,675 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 22:29:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:52,828 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 22:29:52,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:29:52,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 22:29:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:52,829 INFO L225 Difference]: With dead ends: 131 [2019-11-23 22:29:52,830 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:29:52,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:29:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 22:29:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:29:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 22:29:52,841 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 22:29:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:52,841 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 22:29:52,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:29:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 22:29:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:29:52,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:52,843 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:53,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:53,044 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 22:29:53,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:53,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975168216] [2019-11-23 22:29:53,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 22:29:53,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975168216] [2019-11-23 22:29:53,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988686423] [2019-11-23 22:29:53,218 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 22:29:53,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:29:53,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:53,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:53,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 22:29:53,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:53,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:29:53,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702341396] [2019-11-23 22:29:53,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:29:53,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:29:53,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:53,494 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 22:29:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:53,548 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 22:29:53,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:29:53,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 22:29:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:53,549 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:29:53,549 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:29:53,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:29:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 22:29:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 22:29:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 22:29:53,555 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 22:29:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:53,555 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 22:29:53,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:29:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 22:29:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 22:29:53,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:53,556 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:53,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:53,764 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 22:29:53,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:53,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553372819] [2019-11-23 22:29:53,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:53,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553372819] [2019-11-23 22:29:53,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584130684] [2019-11-23 22:29:53,930 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 22:29:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:53,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:29:53,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:54,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:54,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:29:54,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723130412] [2019-11-23 22:29:54,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:29:54,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:54,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:29:54,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:54,018 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 22:29:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:54,074 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 22:29:54,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:54,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 22:29:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:54,075 INFO L225 Difference]: With dead ends: 142 [2019-11-23 22:29:54,076 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:29:54,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 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 22:29:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:29:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 22:29:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:29:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 22:29:54,081 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 22:29:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:54,081 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 22:29:54,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:29:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 22:29:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:29:54,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:54,082 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:54,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:54,283 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 22:29:54,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:54,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516306998] [2019-11-23 22:29:54,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:54,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516306998] [2019-11-23 22:29:54,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903536245] [2019-11-23 22:29:54,468 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 22:29:54,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:54,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:54,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:29:54,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:54,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:54,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:29:54,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976565840] [2019-11-23 22:29:54,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:29:54,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:29:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:54,589 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 22:29:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:54,640 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 22:29:54,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:29:54,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 22:29:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:54,641 INFO L225 Difference]: With dead ends: 144 [2019-11-23 22:29:54,641 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:29:54,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 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 22:29:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:29:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 22:29:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 22:29:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 22:29:54,646 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 22:29:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:54,646 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 22:29:54,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:29:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 22:29:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 22:29:54,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:54,647 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:54,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:54,857 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 22:29:54,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:54,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483468270] [2019-11-23 22:29:54,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:55,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483468270] [2019-11-23 22:29:55,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289027440] [2019-11-23 22:29:55,051 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 22:29:55,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:29:55,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:55,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:29:55,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:29:55,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:55,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:29:55,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081155161] [2019-11-23 22:29:55,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:29:55,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:29:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:29:55,291 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 22:29:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:55,388 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 22:29:55,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:29:55,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 22:29:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:55,389 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:29:55,389 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 22:29:55,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:29:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 22:29:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 22:29:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:29:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 22:29:55,392 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 22:29:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:55,393 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 22:29:55,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:29:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 22:29:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:29:55,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:55,393 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:55,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:55,594 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 22:29:55,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:55,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821834659] [2019-11-23 22:29:55,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:29:55,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821834659] [2019-11-23 22:29:55,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801769094] [2019-11-23 22:29:55,765 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 22:29:55,825 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:55,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:55,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:29:55,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 22:29:55,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:55,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 22:29:55,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584366663] [2019-11-23 22:29:55,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:29:55,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:55,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:29:55,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:29:55,912 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 22:29:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:56,122 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 22:29:56,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:29:56,123 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 22:29:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:56,123 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:29:56,123 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:29:56,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:29:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:29:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 22:29:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:29:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 22:29:56,128 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 22:29:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:56,128 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 22:29:56,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:29:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 22:29:56,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:29:56,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:56,130 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:56,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:56,330 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:56,331 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 22:29:56,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:56,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472292842] [2019-11-23 22:29:56,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:29:56,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472292842] [2019-11-23 22:29:56,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611323519] [2019-11-23 22:29:56,559 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 22:29:57,372 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:29:57,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:57,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:29:57,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 22:29:57,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:57,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 22:29:57,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197697393] [2019-11-23 22:29:57,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:29:57,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:29:57,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:29:57,488 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 22:29:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:57,697 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 22:29:57,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:29:57,697 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 22:29:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:57,698 INFO L225 Difference]: With dead ends: 175 [2019-11-23 22:29:57,698 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 22:29:57,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:29:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 22:29:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 22:29:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 22:29:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 22:29:57,703 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 22:29:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:57,703 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 22:29:57,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:29:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 22:29:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 22:29:57,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:57,705 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:57,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:57,910 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:57,910 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 22:29:57,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:57,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423943735] [2019-11-23 22:29:57,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:29:58,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423943735] [2019-11-23 22:29:58,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20615723] [2019-11-23 22:29:58,151 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 22:29:58,649 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:29:58,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:58,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:29:58,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 22:29:58,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:58,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 22:29:58,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690683131] [2019-11-23 22:29:58,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:29:58,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:29:58,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:29:58,788 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 22:29:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:58,879 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 22:29:58,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:29:58,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 22:29:58,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:58,880 INFO L225 Difference]: With dead ends: 183 [2019-11-23 22:29:58,880 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:29:58,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:29:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:29:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 22:29:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 22:29:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 22:29:58,885 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 22:29:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:58,885 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 22:29:58,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:29:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 22:29:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 22:29:58,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:58,886 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:59,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:59,090 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:59,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 22:29:59,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:59,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504325370] [2019-11-23 22:29:59,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:29:59,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504325370] [2019-11-23 22:29:59,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137853151] [2019-11-23 22:29:59,356 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 22:29:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:59,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:29:59,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:29:59,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:59,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:29:59,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050402215] [2019-11-23 22:29:59,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:29:59,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:29:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:29:59,532 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 22:29:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:59,622 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2019-11-23 22:29:59,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:29:59,623 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 22:29:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:59,624 INFO L225 Difference]: With dead ends: 185 [2019-11-23 22:29:59,624 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:29:59,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 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 22:29:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:29:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-11-23 22:29:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:29:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 22:29:59,630 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 22:29:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:59,630 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 22:29:59,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:29:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 22:29:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:29:59,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:59,632 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:59,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:59,837 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:59,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 22:29:59,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:59,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356539345] [2019-11-23 22:29:59,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 22:29:59,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356539345] [2019-11-23 22:29:59,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134066613] [2019-11-23 22:29:59,948 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 22:30:00,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:00,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:00,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:30:00,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 22:30:00,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:00,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:30:00,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291535033] [2019-11-23 22:30:00,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:30:00,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:00,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:30:00,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:30:00,057 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 11 states. [2019-11-23 22:30:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:00,151 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2019-11-23 22:30:00,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:30:00,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 113 [2019-11-23 22:30:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:00,153 INFO L225 Difference]: With dead ends: 178 [2019-11-23 22:30:00,153 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:30:00,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 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 22:30:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:30:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2019-11-23 22:30:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 22:30:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2019-11-23 22:30:00,158 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2019-11-23 22:30:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:00,159 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2019-11-23 22:30:00,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:30:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2019-11-23 22:30:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:30:00,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:00,160 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:00,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:00,363 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:00,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1096852194, now seen corresponding path program 21 times [2019-11-23 22:30:00,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:00,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790400803] [2019-11-23 22:30:00,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:30:00,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790400803] [2019-11-23 22:30:00,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330173912] [2019-11-23 22:30:00,465 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 22:30:00,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:30:00,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:00,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:30:00,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:30:00,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:00,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:30:00,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55560073] [2019-11-23 22:30:00,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:30:00,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:00,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:30:00,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:30:00,722 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2019-11-23 22:30:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:00,760 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2019-11-23 22:30:00,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:30:00,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 119 [2019-11-23 22:30:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:00,763 INFO L225 Difference]: With dead ends: 146 [2019-11-23 22:30:00,763 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:30:00,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 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 22:30:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:30:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 22:30:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:30:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2019-11-23 22:30:00,770 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2019-11-23 22:30:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:00,771 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2019-11-23 22:30:00,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:30:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2019-11-23 22:30:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 22:30:00,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:00,772 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:00,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:00,976 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash 716041244, now seen corresponding path program 22 times [2019-11-23 22:30:00,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:00,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040526836] [2019-11-23 22:30:00,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:30:01,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040526836] [2019-11-23 22:30:01,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753892401] [2019-11-23 22:30:01,114 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 22:30:01,197 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:01,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:01,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:30:01,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:30:01,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:01,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:30:01,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606493831] [2019-11-23 22:30:01,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:30:01,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:30:01,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:30:01,220 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 12 states. [2019-11-23 22:30:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:01,314 INFO L93 Difference]: Finished difference Result 192 states and 201 transitions. [2019-11-23 22:30:01,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:30:01,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 121 [2019-11-23 22:30:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:01,315 INFO L225 Difference]: With dead ends: 192 [2019-11-23 22:30:01,315 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:30:01,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 121 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 22:30:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:30:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2019-11-23 22:30:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 22:30:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 22:30:01,320 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2019-11-23 22:30:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:01,320 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 22:30:01,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:30:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 22:30:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 22:30:01,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:01,321 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:01,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:01,526 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2118826522, now seen corresponding path program 23 times [2019-11-23 22:30:01,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:01,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528222484] [2019-11-23 22:30:01,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2019-11-23 22:30:01,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528222484] [2019-11-23 22:30:01,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674649665] [2019-11-23 22:30:01,658 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 22:30:04,243 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:30:04,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:04,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:30:04,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2019-11-23 22:30:04,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:04,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:30:04,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378211787] [2019-11-23 22:30:04,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:30:04,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:30:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:30:04,277 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 13 states. [2019-11-23 22:30:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:04,394 INFO L93 Difference]: Finished difference Result 202 states and 211 transitions. [2019-11-23 22:30:04,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:30:04,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 127 [2019-11-23 22:30:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:04,395 INFO L225 Difference]: With dead ends: 202 [2019-11-23 22:30:04,395 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 22:30:04,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:30:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 22:30:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2019-11-23 22:30:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 22:30:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 22:30:04,401 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 127 [2019-11-23 22:30:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:04,401 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 22:30:04,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:30:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 22:30:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 22:30:04,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:04,402 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:04,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:04,609 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 866202008, now seen corresponding path program 24 times [2019-11-23 22:30:04,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:04,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250905359] [2019-11-23 22:30:04,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2019-11-23 22:30:04,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250905359] [2019-11-23 22:30:04,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434962729] [2019-11-23 22:30:04,770 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 22:30:07,342 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:30:07,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:07,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:30:07,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2019-11-23 22:30:07,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:07,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-11-23 22:30:07,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99053205] [2019-11-23 22:30:07,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:30:07,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:07,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:30:07,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:30:07,478 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 22 states. [2019-11-23 22:30:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:07,669 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2019-11-23 22:30:07,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:30:07,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 133 [2019-11-23 22:30:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:07,671 INFO L225 Difference]: With dead ends: 215 [2019-11-23 22:30:07,671 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 22:30:07,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:30:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 22:30:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2019-11-23 22:30:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 22:30:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 22:30:07,676 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 133 [2019-11-23 22:30:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:07,677 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 22:30:07,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:30:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 22:30:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 22:30:07,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:07,678 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:07,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:07,879 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:07,879 INFO L82 PathProgramCache]: Analyzing trace with hash 507089812, now seen corresponding path program 25 times [2019-11-23 22:30:07,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:07,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452098830] [2019-11-23 22:30:07,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2019-11-23 22:30:08,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452098830] [2019-11-23 22:30:08,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81506229] [2019-11-23 22:30:08,064 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 22:30:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:08,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:30:08,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2019-11-23 22:30:08,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:08,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-11-23 22:30:08,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329559086] [2019-11-23 22:30:08,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:30:08,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:30:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:30:08,419 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 24 states. [2019-11-23 22:30:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:08,621 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2019-11-23 22:30:08,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:30:08,622 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 141 [2019-11-23 22:30:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:08,623 INFO L225 Difference]: With dead ends: 229 [2019-11-23 22:30:08,623 INFO L226 Difference]: Without dead ends: 154 [2019-11-23 22:30:08,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:30:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-11-23 22:30:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2019-11-23 22:30:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 22:30:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2019-11-23 22:30:08,629 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2019-11-23 22:30:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:08,629 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2019-11-23 22:30:08,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:30:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2019-11-23 22:30:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 22:30:08,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:08,631 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:08,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:08,835 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:08,835 INFO L82 PathProgramCache]: Analyzing trace with hash 42764432, now seen corresponding path program 26 times [2019-11-23 22:30:08,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:08,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103690598] [2019-11-23 22:30:08,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2019-11-23 22:30:08,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103690598] [2019-11-23 22:30:08,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52315452] [2019-11-23 22:30:08,992 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 22:30:09,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:09,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:09,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:30:09,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2019-11-23 22:30:09,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:09,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 22:30:09,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836236186] [2019-11-23 22:30:09,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:30:09,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:30:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:30:09,129 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 16 states. [2019-11-23 22:30:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:09,267 INFO L93 Difference]: Finished difference Result 240 states and 249 transitions. [2019-11-23 22:30:09,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:30:09,268 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 149 [2019-11-23 22:30:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:09,269 INFO L225 Difference]: With dead ends: 240 [2019-11-23 22:30:09,269 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 22:30:09,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:30:09,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 22:30:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2019-11-23 22:30:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 22:30:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 22:30:09,274 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2019-11-23 22:30:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:09,274 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 22:30:09,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:30:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 22:30:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 22:30:09,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:09,275 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:09,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:09,479 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash 318631310, now seen corresponding path program 27 times [2019-11-23 22:30:09,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:09,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267289915] [2019-11-23 22:30:09,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2019-11-23 22:30:09,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267289915] [2019-11-23 22:30:09,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489268582] [2019-11-23 22:30:09,669 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 22:30:09,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 22:30:09,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:09,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:30:09,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-11-23 22:30:10,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:10,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2019-11-23 22:30:10,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640021987] [2019-11-23 22:30:10,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:30:10,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:30:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:30:10,095 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 27 states. [2019-11-23 22:30:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:10,293 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2019-11-23 22:30:10,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:30:10,293 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 155 [2019-11-23 22:30:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:10,294 INFO L225 Difference]: With dead ends: 253 [2019-11-23 22:30:10,294 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 22:30:10,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:30:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 22:30:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2019-11-23 22:30:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 22:30:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 22:30:10,301 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 155 [2019-11-23 22:30:10,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:10,301 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 22:30:10,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:30:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 22:30:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 22:30:10,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:10,302 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 14, 14, 14, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:10,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:10,503 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash -961681526, now seen corresponding path program 28 times [2019-11-23 22:30:10,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:10,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515026804] [2019-11-23 22:30:10,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2019-11-23 22:30:10,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515026804] [2019-11-23 22:30:10,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953908606] [2019-11-23 22:30:10,666 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 22:30:10,773 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:10,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:10,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:30:10,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2019-11-23 22:30:11,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:11,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2019-11-23 22:30:11,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24980553] [2019-11-23 22:30:11,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:30:11,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:11,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:30:11,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:30:11,031 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 29 states. [2019-11-23 22:30:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:11,243 INFO L93 Difference]: Finished difference Result 267 states and 277 transitions. [2019-11-23 22:30:11,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:30:11,243 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 163 [2019-11-23 22:30:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:11,244 INFO L225 Difference]: With dead ends: 267 [2019-11-23 22:30:11,244 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 22:30:11,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:30:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 22:30:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 22:30:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 22:30:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 22:30:11,253 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 22:30:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:11,253 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 22:30:11,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:30:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 22:30:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 22:30:11,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:11,255 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 15, 15, 15, 15, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:11,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:11,461 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:11,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1242788998, now seen corresponding path program 29 times [2019-11-23 22:30:11,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:11,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874584168] [2019-11-23 22:30:11,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-23 22:30:11,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874584168] [2019-11-23 22:30:11,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952517495] [2019-11-23 22:30:11,704 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 22:30:19,833 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:30:19,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:19,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:30:19,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-23 22:30:19,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:19,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 22:30:19,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183270909] [2019-11-23 22:30:19,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:30:19,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:30:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:30:19,883 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 16 states. [2019-11-23 22:30:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:19,946 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2019-11-23 22:30:19,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:30:19,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 171 [2019-11-23 22:30:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:19,948 INFO L225 Difference]: With dead ends: 212 [2019-11-23 22:30:19,948 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 22:30:19,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:30:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 22:30:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2019-11-23 22:30:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 22:30:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2019-11-23 22:30:19,953 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 171 [2019-11-23 22:30:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:19,954 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2019-11-23 22:30:19,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:30:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2019-11-23 22:30:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 22:30:19,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:19,955 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 15, 15, 15, 15, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:20,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:20,163 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1120642684, now seen corresponding path program 30 times [2019-11-23 22:30:20,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:20,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861729502] [2019-11-23 22:30:20,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2019-11-23 22:30:20,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861729502] [2019-11-23 22:30:20,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461947433] [2019-11-23 22:30:20,399 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 22:30:25,700 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:30:25,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:25,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:30:25,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 25 proven. 225 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2019-11-23 22:30:25,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:25,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 21 [2019-11-23 22:30:25,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887696021] [2019-11-23 22:30:25,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:30:25,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:30:25,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:30:25,798 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 21 states. [2019-11-23 22:30:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:26,345 INFO L93 Difference]: Finished difference Result 282 states and 291 transitions. [2019-11-23 22:30:26,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:30:26,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2019-11-23 22:30:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:26,347 INFO L225 Difference]: With dead ends: 282 [2019-11-23 22:30:26,347 INFO L226 Difference]: Without dead ends: 183 [2019-11-23 22:30:26,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=481, Invalid=851, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:30:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-23 22:30:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2019-11-23 22:30:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 22:30:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 22:30:26,359 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 173 [2019-11-23 22:30:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:26,359 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 22:30:26,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:30:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 22:30:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 22:30:26,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:26,362 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 16, 16, 16, 16, 16, 16, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:26,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:26,572 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1108038786, now seen corresponding path program 31 times [2019-11-23 22:30:26,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:26,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939980772] [2019-11-23 22:30:26,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-23 22:30:26,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939980772] [2019-11-23 22:30:26,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553333348] [2019-11-23 22:30:26,854 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 22:30:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:26,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:30:26,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-23 22:30:26,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:26,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:30:26,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246582418] [2019-11-23 22:30:26,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:30:26,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:30:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:30:26,999 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 20 states. [2019-11-23 22:30:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:27,170 INFO L93 Difference]: Finished difference Result 292 states and 301 transitions. [2019-11-23 22:30:27,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:30:27,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 179 [2019-11-23 22:30:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:27,172 INFO L225 Difference]: With dead ends: 292 [2019-11-23 22:30:27,172 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:30:27,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 179 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 22:30:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:30:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2019-11-23 22:30:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:30:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2019-11-23 22:30:27,180 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 179 [2019-11-23 22:30:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:27,180 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2019-11-23 22:30:27,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:30:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2019-11-23 22:30:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:30:27,182 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:27,182 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 17, 17, 17, 17, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:27,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:27,383 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 839039232, now seen corresponding path program 32 times [2019-11-23 22:30:27,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:27,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867104263] [2019-11-23 22:30:27,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2019-11-23 22:30:27,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867104263] [2019-11-23 22:30:27,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373876446] [2019-11-23 22:30:27,580 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 22:30:27,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:27,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:27,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:30:27,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1147 trivial. 0 not checked. [2019-11-23 22:30:28,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:28,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2019-11-23 22:30:28,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832509011] [2019-11-23 22:30:28,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:30:28,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:30:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:30:28,006 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 34 states. [2019-11-23 22:30:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:28,331 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2019-11-23 22:30:28,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:30:28,332 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 185 [2019-11-23 22:30:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:28,334 INFO L225 Difference]: With dead ends: 305 [2019-11-23 22:30:28,334 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 22:30:28,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:30:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 22:30:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2019-11-23 22:30:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 22:30:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 22:30:28,340 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 185 [2019-11-23 22:30:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:28,341 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 22:30:28,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:30:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 22:30:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 22:30:28,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:28,342 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:28,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:28,546 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1172692476, now seen corresponding path program 33 times [2019-11-23 22:30:28,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:28,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458416334] [2019-11-23 22:30:28,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2019-11-23 22:30:28,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458416334] [2019-11-23 22:30:28,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406160169] [2019-11-23 22:30:28,753 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 22:30:29,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 22:30:29,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:29,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:30:29,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2019-11-23 22:30:29,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:29,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:30:29,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043313300] [2019-11-23 22:30:29,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:30:29,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:30:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:30:29,332 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 18 states. [2019-11-23 22:30:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:29,380 INFO L93 Difference]: Finished difference Result 240 states and 245 transitions. [2019-11-23 22:30:29,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:30:29,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 193 [2019-11-23 22:30:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:29,382 INFO L225 Difference]: With dead ends: 240 [2019-11-23 22:30:29,382 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 22:30:29,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 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 22:30:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 22:30:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 22:30:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 22:30:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 22:30:29,388 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2019-11-23 22:30:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:29,388 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 22:30:29,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:30:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 22:30:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 22:30:29,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:29,390 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:29,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:29,596 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1372917114, now seen corresponding path program 34 times [2019-11-23 22:30:29,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:29,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406953273] [2019-11-23 22:30:29,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2019-11-23 22:30:29,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406953273] [2019-11-23 22:30:29,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237869097] [2019-11-23 22:30:29,811 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 22:30:29,923 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:29,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:29,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:30:29,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2019-11-23 22:30:30,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:30,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2019-11-23 22:30:30,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281461601] [2019-11-23 22:30:30,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:30:30,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:30,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:30:30,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:30:30,265 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 37 states. [2019-11-23 22:30:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:30,627 INFO L93 Difference]: Finished difference Result 323 states and 333 transitions. [2019-11-23 22:30:30,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:30:30,627 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 195 [2019-11-23 22:30:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:30,628 INFO L225 Difference]: With dead ends: 323 [2019-11-23 22:30:30,628 INFO L226 Difference]: Without dead ends: 208 [2019-11-23 22:30:30,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:30:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-23 22:30:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2019-11-23 22:30:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 22:30:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2019-11-23 22:30:30,634 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 195 [2019-11-23 22:30:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:30,635 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2019-11-23 22:30:30,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:30:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2019-11-23 22:30:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 22:30:30,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:30,636 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:30,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:30,839 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:30,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1175479926, now seen corresponding path program 35 times [2019-11-23 22:30:30,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:30,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035715598] [2019-11-23 22:30:30,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1739 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2019-11-23 22:30:31,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035715598] [2019-11-23 22:30:31,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322503273] [2019-11-23 22:30:31,343 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 22:30:55,160 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:30:55,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:55,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:30:55,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1739 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2019-11-23 22:30:55,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:55,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:30:55,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393755819] [2019-11-23 22:30:55,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:30:55,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:30:55,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:30:55,216 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand 23 states. [2019-11-23 22:30:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:55,408 INFO L93 Difference]: Finished difference Result 331 states and 340 transitions. [2019-11-23 22:30:55,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:30:55,409 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 203 [2019-11-23 22:30:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:55,410 INFO L225 Difference]: With dead ends: 331 [2019-11-23 22:30:55,411 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 22:30:55,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:30:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 22:30:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2019-11-23 22:30:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-11-23 22:30:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2019-11-23 22:30:55,420 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 203 [2019-11-23 22:30:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:55,420 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2019-11-23 22:30:55,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:30:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2019-11-23 22:30:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-23 22:30:55,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:55,421 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:55,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:55,633 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:55,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1335828236, now seen corresponding path program 36 times [2019-11-23 22:30:55,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:55,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846292565] [2019-11-23 22:30:55,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:30:55,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846292565] [2019-11-23 22:30:55,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858309850] [2019-11-23 22:30:55,883 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 22:31:08,222 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:31:08,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:31:08,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:31:08,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:31:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:31:08,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:31:08,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:31:08,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154456525] [2019-11-23 22:31:08,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:31:08,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:31:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:31:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:31:08,275 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand 20 states. [2019-11-23 22:31:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:31:08,333 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2019-11-23 22:31:08,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:31:08,334 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 209 [2019-11-23 22:31:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:31:08,335 INFO L225 Difference]: With dead ends: 260 [2019-11-23 22:31:08,335 INFO L226 Difference]: Without dead ends: 213 [2019-11-23 22:31:08,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 209 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 22:31:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-23 22:31:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2019-11-23 22:31:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-23 22:31:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2019-11-23 22:31:08,341 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 209 [2019-11-23 22:31:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:31:08,341 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2019-11-23 22:31:08,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:31:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2019-11-23 22:31:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-23 22:31:08,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:31:08,343 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:31:08,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:31:08,554 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:31:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:31:08,554 INFO L82 PathProgramCache]: Analyzing trace with hash -5172622, now seen corresponding path program 37 times [2019-11-23 22:31:08,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:31:08,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162850814] [2019-11-23 22:31:08,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:31:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:31:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:31:08,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162850814] [2019-11-23 22:31:08,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538767166] [2019-11-23 22:31:08,871 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 22:31:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:31:08,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:31:08,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:31:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:31:09,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:31:09,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:31:09,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003259522] [2019-11-23 22:31:09,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:31:09,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:31:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:31:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:31:09,066 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand 21 states. [2019-11-23 22:31:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:31:09,129 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2019-11-23 22:31:09,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:31:09,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 211 [2019-11-23 22:31:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:31:09,130 INFO L225 Difference]: With dead ends: 262 [2019-11-23 22:31:09,131 INFO L226 Difference]: Without dead ends: 215 [2019-11-23 22:31:09,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:31:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-11-23 22:31:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-11-23 22:31:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-23 22:31:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2019-11-23 22:31:09,136 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 211 [2019-11-23 22:31:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:31:09,136 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2019-11-23 22:31:09,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:31:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2019-11-23 22:31:09,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-23 22:31:09,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:31:09,138 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:31:09,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:31:09,341 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:31:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:31:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1145381776, now seen corresponding path program 38 times [2019-11-23 22:31:09,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:31:09,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078691193] [2019-11-23 22:31:09,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:31:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:31:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:31:09,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078691193] [2019-11-23 22:31:09,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756630500] [2019-11-23 22:31:09,651 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 22:31:09,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:31:09,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:31:09,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:31:09,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:31:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:31:09,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:31:09,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:31:09,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168276028] [2019-11-23 22:31:09,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:31:09,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:31:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:31:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:31:09,871 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand 22 states. [2019-11-23 22:31:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:31:09,990 INFO L93 Difference]: Finished difference Result 263 states and 268 transitions. [2019-11-23 22:31:09,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:31:09,991 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 213 [2019-11-23 22:31:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:31:09,992 INFO L225 Difference]: With dead ends: 263 [2019-11-23 22:31:09,992 INFO L226 Difference]: Without dead ends: 216 [2019-11-23 22:31:09,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:31:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-23 22:31:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2019-11-23 22:31:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-23 22:31:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2019-11-23 22:31:09,999 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 213 [2019-11-23 22:31:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:31:09,999 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2019-11-23 22:31:09,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:31:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2019-11-23 22:31:10,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-23 22:31:10,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:31:10,001 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:31:10,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:31:10,206 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:31:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:31:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1669718290, now seen corresponding path program 39 times [2019-11-23 22:31:10,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:31:10,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023997569] [2019-11-23 22:31:10,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:31:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat