/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:34:00,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:34:00,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:34:00,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:34:00,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:34:00,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:34:00,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:34:00,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:34:00,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:34:00,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:34:00,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:34:00,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:34:00,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:34:00,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:34:00,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:34:00,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:34:00,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:34:00,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:34:00,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:34:00,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:34:00,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:34:00,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:34:00,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:34:00,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:34:00,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:34:00,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:34:00,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:34:00,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:34:00,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:34:00,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:34:00,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:34:00,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:34:00,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:34:00,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:34:00,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:34:00,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:34:00,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:34:00,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:34:00,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:34:00,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:34:00,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:34:00,473 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 [2020-10-12 19:34:00,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:34:00,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:34:00,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:34:00,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:34:00,523 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:34:00,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:34:00,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:34:00,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:34:00,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:34:00,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:34:00,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:34:00,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:34:00,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:34:00,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:34:00,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:34:00,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:34:00,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:34:00,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:34:00,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:34:00,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:34:00,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:34:00,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:34:00,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:34:00,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:34:00,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:34:00,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:34:00,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:34:00,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:34:00,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:34:00,531 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:34:00,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:34:00,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:34:00,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:34:00,901 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:34:00,901 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:34:00,902 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:34:00,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4319e7fe0/dc5796eba6c541259a1df8c368f02ec1/FLAGffe4e9b54 [2020-10-12 19:34:01,454 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:34:01,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:34:01,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4319e7fe0/dc5796eba6c541259a1df8c368f02ec1/FLAGffe4e9b54 [2020-10-12 19:34:01,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4319e7fe0/dc5796eba6c541259a1df8c368f02ec1 [2020-10-12 19:34:01,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:34:01,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:34:01,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:34:01,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:34:01,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:34:01,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:34:01" (1/1) ... [2020-10-12 19:34:01,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3baa9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:01, skipping insertion in model container [2020-10-12 19:34:01,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:34:01" (1/1) ... [2020-10-12 19:34:01,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:34:01,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:34:02,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:34:02,186 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:34:02,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:34:02,389 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:34:02,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02 WrapperNode [2020-10-12 19:34:02,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:34:02,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:34:02,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:34:02,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:34:02,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (1/1) ... [2020-10-12 19:34:02,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (1/1) ... [2020-10-12 19:34:02,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (1/1) ... [2020-10-12 19:34:02,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (1/1) ... [2020-10-12 19:34:02,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (1/1) ... [2020-10-12 19:34:02,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (1/1) ... [2020-10-12 19:34:02,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (1/1) ... [2020-10-12 19:34:02,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:34:02,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:34:02,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:34:02,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:34:02,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (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 [2020-10-12 19:34:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:34:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:34:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:34:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:34:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:34:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:34:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:34:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:34:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:34:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:34:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:34:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:34:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:34:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:34:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:34:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:34:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:34:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:34:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:34:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:34:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:34:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:34:03,066 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:34:03,067 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:34:03,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:34:03 BoogieIcfgContainer [2020-10-12 19:34:03,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:34:03,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:34:03,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:34:03,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:34:03,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:34:01" (1/3) ... [2020-10-12 19:34:03,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710eb0a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:34:03, skipping insertion in model container [2020-10-12 19:34:03,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:34:02" (2/3) ... [2020-10-12 19:34:03,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710eb0a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:34:03, skipping insertion in model container [2020-10-12 19:34:03,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:34:03" (3/3) ... [2020-10-12 19:34:03,081 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:34:03,092 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:34:03,100 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:34:03,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:34:03,141 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:34:03,141 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:34:03,141 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:34:03,142 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:34:03,142 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:34:03,142 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:34:03,142 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:34:03,143 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:34:03,168 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-12 19:34:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 19:34:03,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:03,179 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, 1, 1, 1] [2020-10-12 19:34:03,180 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:03,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1223956034, now seen corresponding path program 1 times [2020-10-12 19:34:03,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:03,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016470274] [2020-10-12 19:34:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:03,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:03,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:03,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:04,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:05,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:08,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 19:34:08,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:34:08,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4710 [2020-10-12 19:34:08,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:08,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:08,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:34:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:34:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:34:08,495 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:08,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:08,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:08,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:08,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:08,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:34:08,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:08,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:08,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:08,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:08,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:08,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016470274] [2020-10-12 19:34:08,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:08,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:34:08,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965691074] [2020-10-12 19:34:08,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:08,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:08,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:08,592 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 7 states. [2020-10-12 19:34:08,866 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-12 19:34:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:09,520 INFO L93 Difference]: Finished difference Result 522 states and 819 transitions. [2020-10-12 19:34:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:34:09,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-12 19:34:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:09,541 INFO L225 Difference]: With dead ends: 522 [2020-10-12 19:34:09,541 INFO L226 Difference]: Without dead ends: 446 [2020-10-12 19:34:09,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:34:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-12 19:34:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 132. [2020-10-12 19:34:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 19:34:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 191 transitions. [2020-10-12 19:34:09,611 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 191 transitions. Word has length 52 [2020-10-12 19:34:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:09,612 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 191 transitions. [2020-10-12 19:34:09,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 191 transitions. [2020-10-12 19:34:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:09,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:09,615 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:09,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:34:09,615 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash 569398189, now seen corresponding path program 1 times [2020-10-12 19:34:09,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:09,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127129998] [2020-10-12 19:34:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:09,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:09,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:10,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:10,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:10,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:14,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:34:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:34:14,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:34:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:34:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 19:34:14,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:14,940 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:14,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:14,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:14,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:14,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:14,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:14,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:34:14,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:14,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:14,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127129998] [2020-10-12 19:34:14,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:14,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:34:14,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317348912] [2020-10-12 19:34:14,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:34:14,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:34:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:34:14,981 INFO L87 Difference]: Start difference. First operand 132 states and 191 transitions. Second operand 8 states. [2020-10-12 19:34:15,147 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 19:34:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:15,820 INFO L93 Difference]: Finished difference Result 630 states and 968 transitions. [2020-10-12 19:34:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:34:15,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-12 19:34:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:15,826 INFO L225 Difference]: With dead ends: 630 [2020-10-12 19:34:15,826 INFO L226 Difference]: Without dead ends: 528 [2020-10-12 19:34:15,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:34:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-12 19:34:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 158. [2020-10-12 19:34:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 19:34:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 231 transitions. [2020-10-12 19:34:15,851 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 231 transitions. Word has length 54 [2020-10-12 19:34:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:15,852 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 231 transitions. [2020-10-12 19:34:15,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:34:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 231 transitions. [2020-10-12 19:34:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:15,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:15,854 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:15,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:34:15,855 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash 593143411, now seen corresponding path program 1 times [2020-10-12 19:34:15,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:15,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688692236] [2020-10-12 19:34:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:15,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:15,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:16,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:20,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:20,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:20,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:34:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:34:20,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:34:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:34:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 19:34:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:21,114 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:21,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:21,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:21,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:21,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:21,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:34:21,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:21,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688692236] [2020-10-12 19:34:21,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:21,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:34:21,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522297766] [2020-10-12 19:34:21,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:34:21,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:21,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:34:21,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:34:21,144 INFO L87 Difference]: Start difference. First operand 158 states and 231 transitions. Second operand 8 states. [2020-10-12 19:34:21,311 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 19:34:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:21,950 INFO L93 Difference]: Finished difference Result 630 states and 966 transitions. [2020-10-12 19:34:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:34:21,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-12 19:34:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:21,954 INFO L225 Difference]: With dead ends: 630 [2020-10-12 19:34:21,954 INFO L226 Difference]: Without dead ends: 528 [2020-10-12 19:34:21,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:34:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-12 19:34:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 178. [2020-10-12 19:34:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 19:34:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 261 transitions. [2020-10-12 19:34:21,976 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 261 transitions. Word has length 54 [2020-10-12 19:34:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:21,977 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 261 transitions. [2020-10-12 19:34:21,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:34:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 261 transitions. [2020-10-12 19:34:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:21,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:21,979 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:21,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:34:21,979 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:21,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:21,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1492483107, now seen corresponding path program 1 times [2020-10-12 19:34:21,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:21,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298732424] [2020-10-12 19:34:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:22,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:22,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:22,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:24,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:24,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:34:24,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-10-12 19:34:24,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:34:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:34:24,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:24,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:24,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:24,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:24,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:34:24,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:24,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:24,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:24,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:24,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298732424] [2020-10-12 19:34:24,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:24,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:34:24,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933596613] [2020-10-12 19:34:24,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:34:24,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:34:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:34:24,289 INFO L87 Difference]: Start difference. First operand 178 states and 261 transitions. Second operand 6 states. [2020-10-12 19:34:24,436 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:34:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:24,698 INFO L93 Difference]: Finished difference Result 280 states and 422 transitions. [2020-10-12 19:34:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:34:24,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-12 19:34:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:24,700 INFO L225 Difference]: With dead ends: 280 [2020-10-12 19:34:24,700 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 19:34:24,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:34:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 19:34:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-12 19:34:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 19:34:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-10-12 19:34:24,716 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 54 [2020-10-12 19:34:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:24,717 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-10-12 19:34:24,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:34:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-10-12 19:34:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:24,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:24,722 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:24,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:34:24,723 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash 245075410, now seen corresponding path program 1 times [2020-10-12 19:34:24,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:24,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411564192] [2020-10-12 19:34:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:24,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:25,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:26,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:26,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:26,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:34:26,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1995 [2020-10-12 19:34:26,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:26,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:26,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:34:26,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 19:34:26,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:26,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:26,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:26,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:26,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:26,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:34:26,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:26,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:26,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411564192] [2020-10-12 19:34:26,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:26,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:34:26,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988302429] [2020-10-12 19:34:26,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:26,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:26,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:26,921 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 7 states. [2020-10-12 19:34:27,075 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:34:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:27,777 INFO L93 Difference]: Finished difference Result 728 states and 1112 transitions. [2020-10-12 19:34:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:34:27,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-12 19:34:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:27,785 INFO L225 Difference]: With dead ends: 728 [2020-10-12 19:34:27,785 INFO L226 Difference]: Without dead ends: 626 [2020-10-12 19:34:27,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:34:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-10-12 19:34:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 278. [2020-10-12 19:34:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-12 19:34:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 417 transitions. [2020-10-12 19:34:27,817 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 417 transitions. Word has length 54 [2020-10-12 19:34:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:27,818 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 417 transitions. [2020-10-12 19:34:27,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 417 transitions. [2020-10-12 19:34:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:27,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:27,826 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:27,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:34:27,827 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash 268820632, now seen corresponding path program 1 times [2020-10-12 19:34:27,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:27,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150202501] [2020-10-12 19:34:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:27,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:27,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:27,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:28,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:28,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:29,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:29,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:34:29,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1824 [2020-10-12 19:34:29,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:34:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 19:34:29,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:29,874 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:29,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:29,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:29,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:29,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:29,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:34:29,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:29,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:29,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:29,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:29,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150202501] [2020-10-12 19:34:29,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:29,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:34:29,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896167018] [2020-10-12 19:34:29,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:29,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:29,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:29,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:29,909 INFO L87 Difference]: Start difference. First operand 278 states and 417 transitions. Second operand 7 states. [2020-10-12 19:34:30,108 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:34:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:30,522 INFO L93 Difference]: Finished difference Result 896 states and 1369 transitions. [2020-10-12 19:34:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:34:30,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-12 19:34:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:30,528 INFO L225 Difference]: With dead ends: 896 [2020-10-12 19:34:30,528 INFO L226 Difference]: Without dead ends: 748 [2020-10-12 19:34:30,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:34:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-12 19:34:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 428. [2020-10-12 19:34:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-12 19:34:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 652 transitions. [2020-10-12 19:34:30,571 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 652 transitions. Word has length 54 [2020-10-12 19:34:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:30,572 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 652 transitions. [2020-10-12 19:34:30,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 652 transitions. [2020-10-12 19:34:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:30,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:30,573 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:30,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:34:30,573 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:30,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1816805886, now seen corresponding path program 1 times [2020-10-12 19:34:30,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:30,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950445457] [2020-10-12 19:34:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:30,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:30,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:30,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:31,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:31,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:31,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:34:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-12 19:34:31,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:34:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-12 19:34:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:34:31,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:31,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:31,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:31,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:31,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:31,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:31,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:34:31,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:31,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:31,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:31,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950445457] [2020-10-12 19:34:31,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:31,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:34:31,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112938074] [2020-10-12 19:34:31,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:34:31,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:34:31,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:34:31,424 INFO L87 Difference]: Start difference. First operand 428 states and 652 transitions. Second operand 5 states. [2020-10-12 19:34:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:31,984 INFO L93 Difference]: Finished difference Result 828 states and 1269 transitions. [2020-10-12 19:34:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:34:31,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-12 19:34:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:31,989 INFO L225 Difference]: With dead ends: 828 [2020-10-12 19:34:31,989 INFO L226 Difference]: Without dead ends: 826 [2020-10-12 19:34:31,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:34:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-10-12 19:34:32,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 442. [2020-10-12 19:34:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-12 19:34:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 666 transitions. [2020-10-12 19:34:32,044 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 666 transitions. Word has length 54 [2020-10-12 19:34:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:32,045 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 666 transitions. [2020-10-12 19:34:32,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:34:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 666 transitions. [2020-10-12 19:34:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:32,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:32,046 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:32,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:34:32,046 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1796756543, now seen corresponding path program 1 times [2020-10-12 19:34:32,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:32,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585648893] [2020-10-12 19:34:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:32,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:32,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:32,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:32,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:32,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:32,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:34:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-12 19:34:32,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:34:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 19:34:32,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:32,912 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:32,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:32,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:32,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:32,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:32,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:32,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:34:32,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:32,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:32,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:32,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:32,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:32,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585648893] [2020-10-12 19:34:32,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:32,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:34:32,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069720428] [2020-10-12 19:34:32,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:32,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:32,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:32,955 INFO L87 Difference]: Start difference. First operand 442 states and 666 transitions. Second operand 7 states. [2020-10-12 19:34:33,160 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:34:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:33,645 INFO L93 Difference]: Finished difference Result 1168 states and 1775 transitions. [2020-10-12 19:34:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:34:33,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-12 19:34:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:33,651 INFO L225 Difference]: With dead ends: 1168 [2020-10-12 19:34:33,651 INFO L226 Difference]: Without dead ends: 756 [2020-10-12 19:34:33,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:34:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-10-12 19:34:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 442. [2020-10-12 19:34:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-12 19:34:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 662 transitions. [2020-10-12 19:34:33,716 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 662 transitions. Word has length 54 [2020-10-12 19:34:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:33,716 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 662 transitions. [2020-10-12 19:34:33,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 662 transitions. [2020-10-12 19:34:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:34:33,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:33,718 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, 1, 1, 1, 1, 1] [2020-10-12 19:34:33,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:34:33,718 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash -127450484, now seen corresponding path program 1 times [2020-10-12 19:34:33,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:33,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398165349] [2020-10-12 19:34:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:33,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:33,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:35,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:35,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:34:35,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:34:35,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-12 19:34:35,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:34:35,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:35,418 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:35,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:35,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:35,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:35,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:35,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:35,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:34:35,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:35,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:35,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398165349] [2020-10-12 19:34:35,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:35,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:34:35,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984601822] [2020-10-12 19:34:35,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:35,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:35,454 INFO L87 Difference]: Start difference. First operand 442 states and 662 transitions. Second operand 7 states. [2020-10-12 19:34:35,592 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:34:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:36,120 INFO L93 Difference]: Finished difference Result 1397 states and 2119 transitions. [2020-10-12 19:34:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:34:36,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-12 19:34:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:36,126 INFO L225 Difference]: With dead ends: 1397 [2020-10-12 19:34:36,126 INFO L226 Difference]: Without dead ends: 985 [2020-10-12 19:34:36,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:34:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-10-12 19:34:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 461. [2020-10-12 19:34:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-12 19:34:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 689 transitions. [2020-10-12 19:34:36,191 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 689 transitions. Word has length 54 [2020-10-12 19:34:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:36,191 INFO L479 AbstractCegarLoop]: Abstraction has 461 states and 689 transitions. [2020-10-12 19:34:36,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 689 transitions. [2020-10-12 19:34:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:34:36,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:36,192 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:36,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:34:36,193 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash -680333326, now seen corresponding path program 1 times [2020-10-12 19:34:36,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:36,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146864504] [2020-10-12 19:34:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:36,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:36,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:40,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:40,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:34:40,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:34:40,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3853 [2020-10-12 19:34:40,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:40,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:40,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 19:34:40,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:34:40,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:40,224 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:40,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:40,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:40,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:40,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:40,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:40,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:34:40,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:40,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:40,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:40,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:40,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:40,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146864504] [2020-10-12 19:34:40,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:40,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:34:40,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866116202] [2020-10-12 19:34:40,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:40,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:40,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:40,252 INFO L87 Difference]: Start difference. First operand 461 states and 689 transitions. Second operand 7 states. [2020-10-12 19:34:40,404 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:34:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:41,071 INFO L93 Difference]: Finished difference Result 1105 states and 1667 transitions. [2020-10-12 19:34:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:34:41,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-12 19:34:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:41,077 INFO L225 Difference]: With dead ends: 1105 [2020-10-12 19:34:41,077 INFO L226 Difference]: Without dead ends: 953 [2020-10-12 19:34:41,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:34:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-10-12 19:34:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 565. [2020-10-12 19:34:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-12 19:34:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 849 transitions. [2020-10-12 19:34:41,148 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 849 transitions. Word has length 55 [2020-10-12 19:34:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:41,150 INFO L479 AbstractCegarLoop]: Abstraction has 565 states and 849 transitions. [2020-10-12 19:34:41,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 849 transitions. [2020-10-12 19:34:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:34:41,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:41,152 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:41,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:34:41,152 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash -476787884, now seen corresponding path program 1 times [2020-10-12 19:34:41,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:41,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965155475] [2020-10-12 19:34:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:41,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:34:41,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:34:41,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-12 19:34:41,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 19:34:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 19:34:41,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:41,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:41,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:41,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:41,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:41,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:34:41,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:41,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965155475] [2020-10-12 19:34:41,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:41,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:34:41,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660776145] [2020-10-12 19:34:41,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:34:41,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:41,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:34:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:34:41,573 INFO L87 Difference]: Start difference. First operand 565 states and 849 transitions. Second operand 4 states. [2020-10-12 19:34:41,712 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 19:34:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:42,191 INFO L93 Difference]: Finished difference Result 1517 states and 2303 transitions. [2020-10-12 19:34:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:34:42,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-12 19:34:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:42,202 INFO L225 Difference]: With dead ends: 1517 [2020-10-12 19:34:42,202 INFO L226 Difference]: Without dead ends: 1001 [2020-10-12 19:34:42,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:34:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-10-12 19:34:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 999. [2020-10-12 19:34:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2020-10-12 19:34:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1500 transitions. [2020-10-12 19:34:42,345 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1500 transitions. Word has length 55 [2020-10-12 19:34:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:42,346 INFO L479 AbstractCegarLoop]: Abstraction has 999 states and 1500 transitions. [2020-10-12 19:34:42,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:34:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1500 transitions. [2020-10-12 19:34:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:34:42,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:42,347 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:42,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:34:42,348 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1143779752, now seen corresponding path program 1 times [2020-10-12 19:34:42,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:42,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992272954] [2020-10-12 19:34:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:42,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:42,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:42,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:42,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:42,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:42,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:34:42,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:34:42,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 19:34:42,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:34:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:34:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:42,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:42,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:42,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:42,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992272954] [2020-10-12 19:34:42,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:42,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:34:42,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957836670] [2020-10-12 19:34:42,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:34:42,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:34:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:34:42,646 INFO L87 Difference]: Start difference. First operand 999 states and 1500 transitions. Second operand 4 states. [2020-10-12 19:34:42,781 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 19:34:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:43,275 INFO L93 Difference]: Finished difference Result 2610 states and 3935 transitions. [2020-10-12 19:34:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:34:43,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-12 19:34:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:43,284 INFO L225 Difference]: With dead ends: 2610 [2020-10-12 19:34:43,284 INFO L226 Difference]: Without dead ends: 1648 [2020-10-12 19:34:43,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:34:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-10-12 19:34:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1630. [2020-10-12 19:34:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-10-12 19:34:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2419 transitions. [2020-10-12 19:34:43,488 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2419 transitions. Word has length 56 [2020-10-12 19:34:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:43,488 INFO L479 AbstractCegarLoop]: Abstraction has 1630 states and 2419 transitions. [2020-10-12 19:34:43,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:34:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2419 transitions. [2020-10-12 19:34:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:34:43,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:43,489 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:43,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:34:43,490 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1929185236, now seen corresponding path program 1 times [2020-10-12 19:34:43,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:43,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471034729] [2020-10-12 19:34:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:43,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:43,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:43,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:43,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:43,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:34:43,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:34:43,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-12 19:34:43,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:34:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:34:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:34:43,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:44,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:44,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:44,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:44,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:44,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:34:44,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:44,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471034729] [2020-10-12 19:34:44,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:44,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:34:44,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852439825] [2020-10-12 19:34:44,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:34:44,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:44,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:34:44,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:34:44,071 INFO L87 Difference]: Start difference. First operand 1630 states and 2419 transitions. Second operand 5 states. [2020-10-12 19:34:44,240 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:34:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:44,925 INFO L93 Difference]: Finished difference Result 3472 states and 5208 transitions. [2020-10-12 19:34:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:34:44,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-12 19:34:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:44,938 INFO L225 Difference]: With dead ends: 3472 [2020-10-12 19:34:44,938 INFO L226 Difference]: Without dead ends: 2522 [2020-10-12 19:34:44,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-10-12 19:34:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2498. [2020-10-12 19:34:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2498 states. [2020-10-12 19:34:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3695 transitions. [2020-10-12 19:34:45,209 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3695 transitions. Word has length 57 [2020-10-12 19:34:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:45,209 INFO L479 AbstractCegarLoop]: Abstraction has 2498 states and 3695 transitions. [2020-10-12 19:34:45,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:34:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3695 transitions. [2020-10-12 19:34:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:34:45,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:45,217 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:45,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:34:45,218 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:45,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1536564578, now seen corresponding path program 1 times [2020-10-12 19:34:45,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:45,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968038813] [2020-10-12 19:34:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:45,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:45,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:45,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:45,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:45,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:34:45,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:34:45,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-12 19:34:45,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:45,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:45,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:45,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:34:45,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:45,951 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:45,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:45,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:45,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:45,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:45,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:34:45,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:45,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:45,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:45,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968038813] [2020-10-12 19:34:45,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:45,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:34:45,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710695365] [2020-10-12 19:34:45,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:45,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:45,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:45,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:45,983 INFO L87 Difference]: Start difference. First operand 2498 states and 3695 transitions. Second operand 7 states. [2020-10-12 19:34:46,123 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:34:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:47,040 INFO L93 Difference]: Finished difference Result 7052 states and 10315 transitions. [2020-10-12 19:34:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:34:47,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-12 19:34:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:47,061 INFO L225 Difference]: With dead ends: 7052 [2020-10-12 19:34:47,061 INFO L226 Difference]: Without dead ends: 4606 [2020-10-12 19:34:47,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:34:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4606 states. [2020-10-12 19:34:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4606 to 2540. [2020-10-12 19:34:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2540 states. [2020-10-12 19:34:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 3752 transitions. [2020-10-12 19:34:47,407 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 3752 transitions. Word has length 57 [2020-10-12 19:34:47,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:47,407 INFO L479 AbstractCegarLoop]: Abstraction has 2540 states and 3752 transitions. [2020-10-12 19:34:47,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 3752 transitions. [2020-10-12 19:34:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:34:47,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:47,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:47,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:34:47,408 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1951017154, now seen corresponding path program 1 times [2020-10-12 19:34:47,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:47,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227681679] [2020-10-12 19:34:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:47,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:47,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:47,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:47,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:48,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:48,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:34:48,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:34:48,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-12 19:34:48,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 19:34:48,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:48,579 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:34:48,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:48,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:48,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:48,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:48,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:34:48,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:48,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:48,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227681679] [2020-10-12 19:34:48,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:48,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:34:48,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008269323] [2020-10-12 19:34:48,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:48,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:48,614 INFO L87 Difference]: Start difference. First operand 2540 states and 3752 transitions. Second operand 7 states. [2020-10-12 19:34:48,744 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:34:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:49,601 INFO L93 Difference]: Finished difference Result 6644 states and 9920 transitions. [2020-10-12 19:34:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:34:49,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-12 19:34:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:49,619 INFO L225 Difference]: With dead ends: 6644 [2020-10-12 19:34:49,620 INFO L226 Difference]: Without dead ends: 4870 [2020-10-12 19:34:49,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:34:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2020-10-12 19:34:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 2520. [2020-10-12 19:34:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2020-10-12 19:34:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3723 transitions. [2020-10-12 19:34:50,049 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3723 transitions. Word has length 58 [2020-10-12 19:34:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:50,049 INFO L479 AbstractCegarLoop]: Abstraction has 2520 states and 3723 transitions. [2020-10-12 19:34:50,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3723 transitions. [2020-10-12 19:34:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 19:34:50,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:50,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:50,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:34:50,052 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:50,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1374654458, now seen corresponding path program 1 times [2020-10-12 19:34:50,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:50,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273964395] [2020-10-12 19:34:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:55,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:55,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 19:34:55,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:34:55,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:34:55,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:55,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:34:55,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:55,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 19:34:55,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:55,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:55,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:55,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:55,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273964395] [2020-10-12 19:34:55,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:34:55,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:34:55,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242787380] [2020-10-12 19:34:55,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:34:55,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:34:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:34:55,393 INFO L87 Difference]: Start difference. First operand 2520 states and 3723 transitions. Second operand 11 states. [2020-10-12 19:34:55,565 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:34:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:59,245 INFO L93 Difference]: Finished difference Result 18602 states and 27009 transitions. [2020-10-12 19:34:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:34:59,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-12 19:34:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:59,293 INFO L225 Difference]: With dead ends: 18602 [2020-10-12 19:34:59,293 INFO L226 Difference]: Without dead ends: 16146 [2020-10-12 19:34:59,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=930, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:34:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2020-10-12 19:35:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 6726. [2020-10-12 19:35:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6726 states. [2020-10-12 19:35:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 9854 transitions. [2020-10-12 19:35:00,147 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 9854 transitions. Word has length 79 [2020-10-12 19:35:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:00,147 INFO L479 AbstractCegarLoop]: Abstraction has 6726 states and 9854 transitions. [2020-10-12 19:35:00,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:35:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 9854 transitions. [2020-10-12 19:35:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 19:35:00,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:00,151 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:35:00,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:35:00,151 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1526168493, now seen corresponding path program 1 times [2020-10-12 19:35:00,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:00,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028773911] [2020-10-12 19:35:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:00,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:00,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:01,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:01,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:05,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:05,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 19:35:05,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:35:05,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:35:05,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:05,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:35:05,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:35:05,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:35:05,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:05,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:05,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:05,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:05,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:05,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:05,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:35:05,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:05,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:05,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:05,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:05,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:05,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028773911] [2020-10-12 19:35:05,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:35:05,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:35:05,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125597908] [2020-10-12 19:35:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:35:05,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:35:05,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:35:05,504 INFO L87 Difference]: Start difference. First operand 6726 states and 9854 transitions. Second operand 10 states. [2020-10-12 19:35:05,658 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:35:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:14,805 INFO L93 Difference]: Finished difference Result 61489 states and 89823 transitions. [2020-10-12 19:35:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:35:14,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2020-10-12 19:35:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:14,932 INFO L225 Difference]: With dead ends: 61489 [2020-10-12 19:35:14,932 INFO L226 Difference]: Without dead ends: 59391 [2020-10-12 19:35:14,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2020-10-12 19:35:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59391 states. [2020-10-12 19:35:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59391 to 19932. [2020-10-12 19:35:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19932 states. [2020-10-12 19:35:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19932 states to 19932 states and 29336 transitions. [2020-10-12 19:35:18,290 INFO L78 Accepts]: Start accepts. Automaton has 19932 states and 29336 transitions. Word has length 80 [2020-10-12 19:35:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:18,291 INFO L479 AbstractCegarLoop]: Abstraction has 19932 states and 29336 transitions. [2020-10-12 19:35:18,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:35:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19932 states and 29336 transitions. [2020-10-12 19:35:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:35:18,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:18,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:35:18,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:35:18,296 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash 200478169, now seen corresponding path program 1 times [2020-10-12 19:35:18,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:18,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015353529] [2020-10-12 19:35:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:19,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:21,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:21,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:23,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:23,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:35:23,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:35:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:35:23,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:35:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:35:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 19:35:23,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:23,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:23,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:23,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:23,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:35:23,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:35:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:35:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:23,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015353529] [2020-10-12 19:35:23,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:35:23,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:35:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728883655] [2020-10-12 19:35:23,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:35:23,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:35:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:35:23,524 INFO L87 Difference]: Start difference. First operand 19932 states and 29336 transitions. Second operand 8 states. [2020-10-12 19:35:23,661 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 19:35:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:30,933 INFO L93 Difference]: Finished difference Result 66716 states and 97531 transitions. [2020-10-12 19:35:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:35:30,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-10-12 19:35:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:31,038 INFO L225 Difference]: With dead ends: 66716 [2020-10-12 19:35:31,038 INFO L226 Difference]: Without dead ends: 46865 [2020-10-12 19:35:31,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:35:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46865 states. [2020-10-12 19:35:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46865 to 20625. [2020-10-12 19:35:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20625 states. [2020-10-12 19:35:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 29742 transitions. [2020-10-12 19:35:34,286 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 29742 transitions. Word has length 81 [2020-10-12 19:35:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:34,287 INFO L479 AbstractCegarLoop]: Abstraction has 20625 states and 29742 transitions. [2020-10-12 19:35:34,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:35:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 29742 transitions. [2020-10-12 19:35:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:35:34,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:34,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:35:34,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:35:34,292 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash 219558141, now seen corresponding path program 1 times [2020-10-12 19:35:34,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:34,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065156180] [2020-10-12 19:35:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:34,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:34,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:34,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:34,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:34,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:34,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:35,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:35,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:35,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:35,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:36,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:39,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:35:39,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 19:35:39,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:35:39,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:35:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 19:35:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:35:39,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:39,588 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 27 [2020-10-12 19:35:39,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:39,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:39,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:39,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:35:39,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:39,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:39,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:39,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:39,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:39,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065156180] [2020-10-12 19:35:39,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:35:39,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 19:35:39,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917351419] [2020-10-12 19:35:39,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:35:39,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:39,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:35:39,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:35:39,862 INFO L87 Difference]: Start difference. First operand 20625 states and 29742 transitions. Second operand 14 states. [2020-10-12 19:35:40,011 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 19:35:41,167 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-12 19:35:41,407 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-12 19:35:43,584 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-12 19:35:51,634 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-12 19:36:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:08,160 INFO L93 Difference]: Finished difference Result 108812 states and 152093 transitions. [2020-10-12 19:36:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-10-12 19:36:08,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-12 19:36:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:08,308 INFO L225 Difference]: With dead ends: 108812 [2020-10-12 19:36:08,308 INFO L226 Difference]: Without dead ends: 88220 [2020-10-12 19:36:08,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9619 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2614, Invalid=19736, Unknown=0, NotChecked=0, Total=22350 [2020-10-12 19:36:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88220 states. [2020-10-12 19:36:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88220 to 23400. [2020-10-12 19:36:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23400 states. [2020-10-12 19:36:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 33468 transitions. [2020-10-12 19:36:12,651 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 33468 transitions. Word has length 81 [2020-10-12 19:36:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:12,651 INFO L479 AbstractCegarLoop]: Abstraction has 23400 states and 33468 transitions. [2020-10-12 19:36:12,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:36:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 33468 transitions. [2020-10-12 19:36:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:36:12,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:12,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:12,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:36:12,658 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:12,658 INFO L82 PathProgramCache]: Analyzing trace with hash -501697172, now seen corresponding path program 1 times [2020-10-12 19:36:12,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:12,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226611192] [2020-10-12 19:36:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:12,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:12,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:12,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:12,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:13,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:13,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:17,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:17,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:36:17,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:36:17,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:36:17,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:17,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:36:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 19:36:17,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:17,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:17,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:17,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:17,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:17,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:17,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:36:17,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:17,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:17,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226611192] [2020-10-12 19:36:17,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:36:17,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:36:17,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407547229] [2020-10-12 19:36:17,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:36:17,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:17,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:36:17,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:36:17,958 INFO L87 Difference]: Start difference. First operand 23400 states and 33468 transitions. Second operand 11 states. [2020-10-12 19:36:18,147 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:36:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:28,564 INFO L93 Difference]: Finished difference Result 73817 states and 105295 transitions. [2020-10-12 19:36:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 19:36:28,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-10-12 19:36:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:28,639 INFO L225 Difference]: With dead ends: 73817 [2020-10-12 19:36:28,639 INFO L226 Difference]: Without dead ends: 50506 [2020-10-12 19:36:28,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:36:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50506 states. [2020-10-12 19:36:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50506 to 21647. [2020-10-12 19:36:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21647 states. [2020-10-12 19:36:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21647 states to 21647 states and 30583 transitions. [2020-10-12 19:36:32,688 INFO L78 Accepts]: Start accepts. Automaton has 21647 states and 30583 transitions. Word has length 81 [2020-10-12 19:36:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:32,688 INFO L479 AbstractCegarLoop]: Abstraction has 21647 states and 30583 transitions. [2020-10-12 19:36:32,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:36:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 21647 states and 30583 transitions. [2020-10-12 19:36:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 19:36:32,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:32,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:32,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:36:32,693 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2072831057, now seen corresponding path program 1 times [2020-10-12 19:36:32,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:32,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684521361] [2020-10-12 19:36:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:32,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:32,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:32,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:33,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:37,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:37,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 19:36:37,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:36:37,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:36:37,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:36:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 19:36:37,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:37,995 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:36:37,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:38,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:38,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:38,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:38,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:38,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:36:38,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:38,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:38,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:38,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:38,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:38,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684521361] [2020-10-12 19:36:38,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:36:38,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:36:38,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249624788] [2020-10-12 19:36:38,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:36:38,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:36:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:36:38,033 INFO L87 Difference]: Start difference. First operand 21647 states and 30583 transitions. Second operand 12 states. [2020-10-12 19:36:38,191 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 19:37:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:02,369 INFO L93 Difference]: Finished difference Result 117654 states and 162345 transitions. [2020-10-12 19:37:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 19:37:02,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-12 19:37:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:02,523 INFO L225 Difference]: With dead ends: 117654 [2020-10-12 19:37:02,523 INFO L226 Difference]: Without dead ends: 106119 [2020-10-12 19:37:02,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=816, Invalid=3216, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 19:37:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106119 states. [2020-10-12 19:37:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106119 to 34967. [2020-10-12 19:37:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34967 states. [2020-10-12 19:37:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34967 states to 34967 states and 49537 transitions. [2020-10-12 19:37:10,984 INFO L78 Accepts]: Start accepts. Automaton has 34967 states and 49537 transitions. Word has length 82 [2020-10-12 19:37:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:10,985 INFO L479 AbstractCegarLoop]: Abstraction has 34967 states and 49537 transitions. [2020-10-12 19:37:10,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:37:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 34967 states and 49537 transitions. [2020-10-12 19:37:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 19:37:10,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:10,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:10,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:37:10,990 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:10,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1351575744, now seen corresponding path program 1 times [2020-10-12 19:37:10,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:10,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157264027] [2020-10-12 19:37:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:11,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:13,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:13,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 19:37:13,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:37:13,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2984 [2020-10-12 19:37:13,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:37:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:37:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 19:37:13,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:14,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:14,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:14,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:14,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:14,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:37:14,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:14,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157264027] [2020-10-12 19:37:14,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:37:14,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:37:14,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793827844] [2020-10-12 19:37:14,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:37:14,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:14,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:37:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:37:14,466 INFO L87 Difference]: Start difference. First operand 34967 states and 49537 transitions. Second operand 10 states. [2020-10-12 19:37:14,738 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 19:37:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:33,065 INFO L93 Difference]: Finished difference Result 96688 states and 134549 transitions. [2020-10-12 19:37:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:37:33,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-10-12 19:37:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:33,164 INFO L225 Difference]: With dead ends: 96688 [2020-10-12 19:37:33,164 INFO L226 Difference]: Without dead ends: 78119 [2020-10-12 19:37:33,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:37:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78119 states. [2020-10-12 19:37:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78119 to 35963. [2020-10-12 19:37:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35963 states. [2020-10-12 19:37:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35963 states to 35963 states and 51031 transitions. [2020-10-12 19:37:40,915 INFO L78 Accepts]: Start accepts. Automaton has 35963 states and 51031 transitions. Word has length 82 [2020-10-12 19:37:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:40,915 INFO L479 AbstractCegarLoop]: Abstraction has 35963 states and 51031 transitions. [2020-10-12 19:37:40,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:37:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 35963 states and 51031 transitions. [2020-10-12 19:37:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 19:37:40,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:40,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:40,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:37:40,920 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:40,920 INFO L82 PathProgramCache]: Analyzing trace with hash 475431501, now seen corresponding path program 1 times [2020-10-12 19:37:40,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:40,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55193497] [2020-10-12 19:37:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:40,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:40,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:41,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:41,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:42,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:42,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:44,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 19:37:44,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:37:44,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3935 [2020-10-12 19:37:44,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:37:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:37:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 19:37:44,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:45,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:45,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:45,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:45,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:45,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:45,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:37:45,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:45,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:45,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:45,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:45,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:45,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55193497] [2020-10-12 19:37:45,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:37:45,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:37:45,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299721032] [2020-10-12 19:37:45,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:37:45,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:37:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:37:45,055 INFO L87 Difference]: Start difference. First operand 35963 states and 51031 transitions. Second operand 6 states. [2020-10-12 19:37:45,193 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 110