/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:37:30,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:37:30,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:37:30,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:37:30,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:37:30,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:37:30,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:37:30,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:37:30,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:37:30,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:37:30,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:37:30,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:37:30,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:37:30,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:37:30,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:37:30,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:37:30,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:37:30,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:37:30,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:37:30,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:37:30,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:37:30,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:37:30,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:37:30,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:37:30,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:37:30,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:37:30,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:37:30,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:37:30,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:37:30,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 21:37:30,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:37:30,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:37:30,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:37:30,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:37:30,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:37:30,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:37:30,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:37:30,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:37:30,586 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:37:30,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:37:30,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:37:30,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:37:30,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:37:30,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:37:30,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:37:30,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:37:30,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:37:30,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:37:30,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:37:30,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:37:30,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:37:30,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:37:30,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:37:30,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:37:30,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:37:30,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:37:30,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:37:30,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:37:30,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:37:30,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:37:30,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:37:30,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:37:30,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:37:30,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:37:31,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:37:31,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:37:31,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:37:31,096 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:37:31,096 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:37:31,097 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 21:37:31,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a773d333/c0312d2b99ac4c18b2777f7bc20b604e/FLAG194c23eda [2020-09-24 21:37:31,737 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:37:31,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 21:37:31,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a773d333/c0312d2b99ac4c18b2777f7bc20b604e/FLAG194c23eda [2020-09-24 21:37:32,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a773d333/c0312d2b99ac4c18b2777f7bc20b604e [2020-09-24 21:37:32,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:37:32,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:37:32,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:37:32,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:37:32,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:37:32,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2869c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32, skipping insertion in model container [2020-09-24 21:37:32,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:37:32,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:37:32,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:37:32,398 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:37:32,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:37:32,443 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:37:32,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32 WrapperNode [2020-09-24 21:37:32,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:37:32,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:37:32,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:37:32,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:37:32,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:37:32,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:37:32,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:37:32,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:37:32,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 21:37:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:37:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:37:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 21:37:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:37:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:37:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:37:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:37:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:37:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:37:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:37:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:37:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:37:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:37:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:37:33,015 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:37:33,016 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:37:33,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:33 BoogieIcfgContainer [2020-09-24 21:37:33,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:37:33,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:37:33,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:37:33,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:37:33,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:37:32" (1/3) ... [2020-09-24 21:37:33,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b38020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:33, skipping insertion in model container [2020-09-24 21:37:33,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (2/3) ... [2020-09-24 21:37:33,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b38020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:33, skipping insertion in model container [2020-09-24 21:37:33,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:33" (3/3) ... [2020-09-24 21:37:33,032 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-24 21:37:33,043 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:37:33,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:37:33,074 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:37:33,103 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:37:33,104 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:37:33,104 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:37:33,104 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:37:33,104 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:37:33,104 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:37:33,104 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:37:33,105 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:37:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-24 21:37:33,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 21:37:33,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:33,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:33,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:33,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-24 21:37:33,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:33,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977741100] [2020-09-24 21:37:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:33,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:33,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 21:37:33,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:33,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-09-24 21:37:33,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:33,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:33,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:37:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:33,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:37:33,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:33,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:33,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:33,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:37:33,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:33,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:33,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 21:37:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:33,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:33,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:33,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 21:37:33,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:33,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:33,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:33,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:33,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977741100] [2020-09-24 21:37:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:37:33,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:37:33,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089184965] [2020-09-24 21:37:33,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:37:33,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:37:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:37:33,709 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-24 21:37:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:33,912 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-24 21:37:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:37:33,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 21:37:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:33,927 INFO L225 Difference]: With dead ends: 102 [2020-09-24 21:37:33,927 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 21:37:33,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:37:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 21:37:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-24 21:37:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 21:37:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-24 21:37:33,978 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-24 21:37:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:33,979 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-24 21:37:33,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:37:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-24 21:37:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 21:37:33,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:33,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:33,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:37:33,982 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-24 21:37:33,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:33,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955197021] [2020-09-24 21:37:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 21:37:34,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-09-24 21:37:34,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:37:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:37:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:37:34,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:34,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:37:34,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:34,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:34,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:34,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 21:37:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:34,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:37:34,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:34,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:34,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955197021] [2020-09-24 21:37:34,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:37:34,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:37:34,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746315755] [2020-09-24 21:37:34,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:37:34,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:34,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:37:34,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:37:34,251 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-24 21:37:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:34,438 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-24 21:37:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:37:34,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-24 21:37:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:34,440 INFO L225 Difference]: With dead ends: 92 [2020-09-24 21:37:34,440 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 21:37:34,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:37:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 21:37:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-24 21:37:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 21:37:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-24 21:37:34,451 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-24 21:37:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:34,452 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-24 21:37:34,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:37:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-24 21:37:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 21:37:34,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:34,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:34,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:37:34,455 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:34,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-24 21:37:34,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:34,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418590180] [2020-09-24 21:37:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 21:37:34,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-09-24 21:37:34,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:37:34,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:34,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:37:34,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:34,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:34,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:34,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:34,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:34,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 21:37:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:34,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:37:34,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:34,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:34,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418590180] [2020-09-24 21:37:34,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:34,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:37:34,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051553930] [2020-09-24 21:37:34,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:37:34,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:37:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:37:34,777 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-24 21:37:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:34,974 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-24 21:37:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:37:34,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-24 21:37:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:34,977 INFO L225 Difference]: With dead ends: 102 [2020-09-24 21:37:34,980 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 21:37:34,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:37:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 21:37:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-24 21:37:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 21:37:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-24 21:37:34,995 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-24 21:37:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:34,998 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-24 21:37:34,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:37:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-24 21:37:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 21:37:35,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:35,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:35,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:37:35,006 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-24 21:37:35,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:35,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930138759] [2020-09-24 21:37:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 21:37:35,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:35,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-09-24 21:37:35,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:37:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:37:35,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:35,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:35,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:35,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:35,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:37:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:35,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:37:35,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:35,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930138759] [2020-09-24 21:37:35,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:35,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:37:35,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013309215] [2020-09-24 21:37:35,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:37:35,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:37:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:37:35,499 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-24 21:37:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:35,752 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-24 21:37:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:37:35,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-24 21:37:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:35,755 INFO L225 Difference]: With dead ends: 112 [2020-09-24 21:37:35,755 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 21:37:35,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:37:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 21:37:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-24 21:37:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 21:37:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-24 21:37:35,774 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-24 21:37:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:35,778 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-24 21:37:35,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:37:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-24 21:37:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 21:37:35,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:35,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:35,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:37:35,781 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-24 21:37:35,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:35,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428235495] [2020-09-24 21:37:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:36,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:36,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:37:36,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:36,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-09-24 21:37:36,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:37:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:37:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:36,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:36,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:36,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:36,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:36,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:36,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:37:36,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:36,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:36,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-24 21:37:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:36,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:36,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:36,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:36,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:36,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:37:36,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:36,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:36,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:36,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:36,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:36,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428235495] [2020-09-24 21:37:36,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:36,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:37:36,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830410299] [2020-09-24 21:37:36,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:37:36,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:37:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:37:36,326 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-24 21:37:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:36,536 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-24 21:37:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:37:36,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 21:37:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:36,545 INFO L225 Difference]: With dead ends: 122 [2020-09-24 21:37:36,545 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 21:37:36,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 21:37:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-24 21:37:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 21:37:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-24 21:37:36,555 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-24 21:37:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:36,556 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-24 21:37:36,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:37:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-24 21:37:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:37:36,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:36,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:36,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:37:36,558 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:36,559 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-24 21:37:36,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:36,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837850285] [2020-09-24 21:37:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:36,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 21:37:37,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:37,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-09-24 21:37:37,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:37:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:37:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:37,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:37,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:37,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:37,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:37,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:37,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 21:37:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:37:37,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:37,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:37,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837850285] [2020-09-24 21:37:37,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:37,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:37:37,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322866610] [2020-09-24 21:37:37,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:37:37,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:37:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:37:37,176 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-24 21:37:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:37,420 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-24 21:37:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:37:37,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-24 21:37:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:37,422 INFO L225 Difference]: With dead ends: 132 [2020-09-24 21:37:37,422 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 21:37:37,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:37:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 21:37:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-24 21:37:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-24 21:37:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-24 21:37:37,431 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-24 21:37:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:37,432 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-24 21:37:37,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:37:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-24 21:37:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 21:37:37,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:37,434 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:37,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:37:37,434 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:37,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-24 21:37:37,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:37,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403084055] [2020-09-24 21:37:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:38,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:38,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 21:37:38,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-09-24 21:37:38,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:38,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:37:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:37:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:38,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:38,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:38,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:38,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:38,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:38,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:38,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:38,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:38,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:38,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:38,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 21:37:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:38,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:38,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:38,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:38,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:38,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:38,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:38,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:38,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:38,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:38,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:38,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403084055] [2020-09-24 21:37:38,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:38,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:37:38,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98593659] [2020-09-24 21:37:38,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:37:38,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:38,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:37:38,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:37:38,228 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-24 21:37:38,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:38,581 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-24 21:37:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:37:38,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-24 21:37:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:38,583 INFO L225 Difference]: With dead ends: 142 [2020-09-24 21:37:38,583 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 21:37:38,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:37:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 21:37:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-24 21:37:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 21:37:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-24 21:37:38,607 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-24 21:37:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:38,608 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-24 21:37:38,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:37:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-24 21:37:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-24 21:37:38,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:38,610 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:38,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:37:38,614 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-24 21:37:38,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:38,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074829791] [2020-09-24 21:37:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:39,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:39,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 21:37:39,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-09-24 21:37:39,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:37:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:37:39,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:39,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:39,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:39,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:39,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:39,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:39,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:37:39,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:39,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:39,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 21:37:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:39,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:39,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:39,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:39,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:39,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:37:39,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:39,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:39,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074829791] [2020-09-24 21:37:39,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:39,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:37:39,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088817543] [2020-09-24 21:37:39,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:37:39,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:39,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:37:39,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:39,745 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-24 21:37:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:40,257 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-24 21:37:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:37:40,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-24 21:37:40,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:40,258 INFO L225 Difference]: With dead ends: 152 [2020-09-24 21:37:40,259 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 21:37:40,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:37:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 21:37:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-24 21:37:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 21:37:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-24 21:37:40,267 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-24 21:37:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:40,267 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-24 21:37:40,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:37:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-24 21:37:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-24 21:37:40,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:40,269 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:40,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:37:40,270 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-24 21:37:40,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:40,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830584268] [2020-09-24 21:37:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:40,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:41,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:41,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 21:37:41,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:41,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-09-24 21:37:41,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:37:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:37:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:41,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:41,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:41,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:41,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:41,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:41,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:41,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:41,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:41,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:41,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:41,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 21:37:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:41,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:41,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:41,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:41,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:41,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:37:41,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:41,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:41,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:41,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:41,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:41,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830584268] [2020-09-24 21:37:41,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:41,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:37:41,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884260249] [2020-09-24 21:37:41,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:37:41,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:37:41,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:37:41,484 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-24 21:37:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:41,948 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-24 21:37:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:37:41,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-24 21:37:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:41,950 INFO L225 Difference]: With dead ends: 162 [2020-09-24 21:37:41,950 INFO L226 Difference]: Without dead ends: 132 [2020-09-24 21:37:41,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:37:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-24 21:37:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-24 21:37:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 21:37:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-24 21:37:41,963 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-24 21:37:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:41,963 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-24 21:37:41,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:37:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-24 21:37:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 21:37:41,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:41,965 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:41,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:37:41,966 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:41,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-24 21:37:41,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:41,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948298164] [2020-09-24 21:37:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:42,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:43,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:43,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-24 21:37:43,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:43,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-09-24 21:37:43,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:37:43,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:43,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 21:37:43,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:43,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:43,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:43,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:43,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:43,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:43,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:43,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:43,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 21:37:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:43,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:43,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:43,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:43,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:43,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:43,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948298164] [2020-09-24 21:37:43,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:43,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:37:43,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495517622] [2020-09-24 21:37:43,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:37:43,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:43,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:37:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:37:43,423 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-24 21:37:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:43,920 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-24 21:37:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:37:43,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-24 21:37:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:43,922 INFO L225 Difference]: With dead ends: 172 [2020-09-24 21:37:43,922 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 21:37:43,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:37:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 21:37:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-24 21:37:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 21:37:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-24 21:37:43,931 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-24 21:37:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:43,932 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-24 21:37:43,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:37:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-24 21:37:43,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-24 21:37:43,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:43,937 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:43,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:37:43,937 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:43,938 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-24 21:37:43,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:43,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044484802] [2020-09-24 21:37:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:43,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:45,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:45,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-24 21:37:45,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:45,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-09-24 21:37:45,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:37:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 21:37:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:45,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:45,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:45,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:45,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:45,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:45,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:37:45,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:45,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 21:37:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:45,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:45,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:45,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:45,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:45,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:45,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:45,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:45,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044484802] [2020-09-24 21:37:45,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:45,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 21:37:45,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571820851] [2020-09-24 21:37:45,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 21:37:45,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:45,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 21:37:45,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:37:45,604 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-24 21:37:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:46,196 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-24 21:37:46,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 21:37:46,197 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-24 21:37:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:46,198 INFO L225 Difference]: With dead ends: 182 [2020-09-24 21:37:46,198 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 21:37:46,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 21:37:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 21:37:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-24 21:37:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 21:37:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-24 21:37:46,204 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-24 21:37:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:46,205 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-24 21:37:46,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 21:37:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-24 21:37:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 21:37:46,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:46,207 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:46,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:37:46,207 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-24 21:37:46,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:46,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378465720] [2020-09-24 21:37:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:46,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:47,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:47,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 21:37:47,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:47,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-09-24 21:37:47,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:47,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:37:47,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:47,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-24 21:37:47,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:48,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:48,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:48,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:48,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:48,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:48,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:37:48,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:48,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:48,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 21:37:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:48,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:48,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:48,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:48,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:48,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:48,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:48,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:48,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:48,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:48,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:48,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378465720] [2020-09-24 21:37:48,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:48,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 21:37:48,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6561898] [2020-09-24 21:37:48,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 21:37:48,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 21:37:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:37:48,108 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-24 21:37:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:48,763 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-24 21:37:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:37:48,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-24 21:37:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:48,766 INFO L225 Difference]: With dead ends: 192 [2020-09-24 21:37:48,766 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 21:37:48,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:37:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 21:37:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-24 21:37:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 21:37:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-24 21:37:48,775 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-24 21:37:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:48,775 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-24 21:37:48,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 21:37:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-24 21:37:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 21:37:48,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:48,777 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:48,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:37:48,778 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-24 21:37:48,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:48,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652959362] [2020-09-24 21:37:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:48,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:50,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:50,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 21:37:50,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-09-24 21:37:50,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:37:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-24 21:37:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:51,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:51,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:51,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:51,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:51,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:51,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:37:51,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:51,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:51,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:51,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:51,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:51,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 21:37:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:51,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:51,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:51,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:51,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:51,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:51,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:51,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:51,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:51,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652959362] [2020-09-24 21:37:51,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:51,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 21:37:51,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535410343] [2020-09-24 21:37:51,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 21:37:51,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 21:37:51,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:37:51,043 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-24 21:37:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:51,759 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-24 21:37:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 21:37:51,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-24 21:37:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:51,768 INFO L225 Difference]: With dead ends: 202 [2020-09-24 21:37:51,768 INFO L226 Difference]: Without dead ends: 172 [2020-09-24 21:37:51,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 21:37:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-24 21:37:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-24 21:37:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 21:37:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-24 21:37:51,779 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-24 21:37:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:51,779 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-24 21:37:51,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 21:37:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-24 21:37:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 21:37:51,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:51,781 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:51,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:37:51,782 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:51,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:51,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-24 21:37:51,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:51,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816984722] [2020-09-24 21:37:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:53,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:53,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 21:37:53,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2036 [2020-09-24 21:37:53,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 21:37:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 21:37:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:54,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:54,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:54,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:54,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:54,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:54,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:54,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:54,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:54,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:54,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 21:37:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:54,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:54,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:54,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:54,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:54,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:54,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:54,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:54,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:54,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:54,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:54,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816984722] [2020-09-24 21:37:54,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:54,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 21:37:54,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565190257] [2020-09-24 21:37:54,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 21:37:54,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:54,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 21:37:54,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:37:54,408 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-24 21:37:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:55,269 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-24 21:37:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:37:55,270 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-24 21:37:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:55,271 INFO L225 Difference]: With dead ends: 212 [2020-09-24 21:37:55,271 INFO L226 Difference]: Without dead ends: 182 [2020-09-24 21:37:55,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 21:37:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-24 21:37:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-24 21:37:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-24 21:37:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-24 21:37:55,278 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-24 21:37:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:55,279 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-24 21:37:55,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 21:37:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-24 21:37:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 21:37:55,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:55,281 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:55,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 21:37:55,281 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-24 21:37:55,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:55,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337291771] [2020-09-24 21:37:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:57,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:57,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-24 21:37:57,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:57,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2387 [2020-09-24 21:37:57,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 21:37:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:37:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-24 21:37:57,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:58,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:58,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:58,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:58,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:58,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:58,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:58,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:58,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:58,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:58,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:58,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-24 21:37:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:58,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:58,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:58,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:37:58,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:58,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:58,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:37:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:58,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:58,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337291771] [2020-09-24 21:37:58,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:58,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 21:37:58,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893104890] [2020-09-24 21:37:58,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 21:37:58,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 21:37:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 21:37:58,234 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-24 21:37:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:59,319 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-24 21:37:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 21:37:59,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-24 21:37:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:59,322 INFO L225 Difference]: With dead ends: 222 [2020-09-24 21:37:59,322 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 21:37:59,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 21:37:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 21:37:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-24 21:37:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-24 21:37:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-24 21:37:59,333 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-24 21:37:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:59,333 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-24 21:37:59,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 21:37:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-24 21:37:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 21:37:59,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:59,336 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:59,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 21:37:59,337 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-24 21:37:59,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:59,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681693167] [2020-09-24 21:37:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:02,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:02,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 21:38:02,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:02,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-09-24 21:38:02,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:02,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 21:38:02,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:38:02,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 21:38:02,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:02,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:02,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:02,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:02,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:02,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:02,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:02,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:02,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:02,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:02,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 21:38:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:02,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:02,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:02,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:02,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:02,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:38:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:02,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:02,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681693167] [2020-09-24 21:38:02,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:02,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 21:38:02,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728304673] [2020-09-24 21:38:02,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 21:38:02,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 21:38:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:38:02,671 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-24 21:38:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:03,738 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-24 21:38:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 21:38:03,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-24 21:38:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:03,740 INFO L225 Difference]: With dead ends: 232 [2020-09-24 21:38:03,741 INFO L226 Difference]: Without dead ends: 202 [2020-09-24 21:38:03,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-24 21:38:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-24 21:38:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-24 21:38:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-24 21:38:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-24 21:38:03,748 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-24 21:38:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:03,749 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-24 21:38:03,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 21:38:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-24 21:38:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-24 21:38:03,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:03,751 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:03,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 21:38:03,752 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-24 21:38:03,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:03,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226619778] [2020-09-24 21:38:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:03,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:06,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:06,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-24 21:38:06,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2540 [2020-09-24 21:38:06,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 21:38:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:38:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-24 21:38:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:06,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:06,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:06,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:06,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:06,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:06,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:38:06,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:06,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:06,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:06,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:06,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-24 21:38:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:06,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:06,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:06,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:06,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:38:06,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:06,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:38:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:06,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:07,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226619778] [2020-09-24 21:38:07,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:07,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 21:38:07,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492819235] [2020-09-24 21:38:07,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 21:38:07,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:07,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 21:38:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:38:07,019 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-24 21:38:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:08,208 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-24 21:38:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 21:38:08,208 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-24 21:38:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:08,211 INFO L225 Difference]: With dead ends: 242 [2020-09-24 21:38:08,211 INFO L226 Difference]: Without dead ends: 212 [2020-09-24 21:38:08,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 21:38:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-24 21:38:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-24 21:38:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-24 21:38:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-24 21:38:08,220 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-24 21:38:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:08,221 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-24 21:38:08,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 21:38:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-24 21:38:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-24 21:38:08,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:08,223 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:08,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 21:38:08,224 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:08,224 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-24 21:38:08,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:08,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344107727] [2020-09-24 21:38:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:11,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:11,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-24 21:38:11,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:11,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2748 [2020-09-24 21:38:11,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:11,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 21:38:11,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:38:11,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-24 21:38:11,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:11,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:11,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:11,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:11,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:38:11,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:11,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:11,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:11,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:11,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:11,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 21:38:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:11,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:11,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:11,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:11,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:11,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:38:11,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:11,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:11,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344107727] [2020-09-24 21:38:11,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:11,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-24 21:38:11,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087582287] [2020-09-24 21:38:11,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-24 21:38:11,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:11,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-24 21:38:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:38:11,791 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-24 21:38:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:13,127 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-24 21:38:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 21:38:13,127 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-24 21:38:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:13,130 INFO L225 Difference]: With dead ends: 252 [2020-09-24 21:38:13,130 INFO L226 Difference]: Without dead ends: 222 [2020-09-24 21:38:13,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-24 21:38:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-24 21:38:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-24 21:38:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-24 21:38:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-24 21:38:13,158 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-24 21:38:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:13,159 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-24 21:38:13,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-24 21:38:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-24 21:38:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-24 21:38:13,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:13,162 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:13,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 21:38:13,162 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:13,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-24 21:38:13,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:13,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239555301] [2020-09-24 21:38:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:16,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:16,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-24 21:38:16,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:16,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3136 [2020-09-24 21:38:16,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 21:38:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:38:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-24 21:38:16,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:17,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:17,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:17,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:17,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:17,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:38:17,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:17,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:17,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:17,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:17,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-24 21:38:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:17,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:17,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:17,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:17,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:17,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:17,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:17,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:17,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:38:17,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:17,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:17,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239555301] [2020-09-24 21:38:17,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:17,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-24 21:38:17,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829052685] [2020-09-24 21:38:17,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-24 21:38:17,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-24 21:38:17,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 21:38:17,181 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-24 21:38:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:18,710 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-24 21:38:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 21:38:18,716 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-24 21:38:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:18,718 INFO L225 Difference]: With dead ends: 262 [2020-09-24 21:38:18,718 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 21:38:18,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 21:38:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 21:38:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-24 21:38:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-24 21:38:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-24 21:38:18,727 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-24 21:38:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:18,728 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-24 21:38:18,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-24 21:38:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-24 21:38:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-24 21:38:18,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:18,730 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:18,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 21:38:18,731 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-24 21:38:18,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:18,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451867469] [2020-09-24 21:38:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:22,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:22,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-09-24 21:38:22,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:22,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3711 [2020-09-24 21:38:22,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 21:38:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:38:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-09-24 21:38:22,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:23,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:23,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:23,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:23,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:23,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:23,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2