/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=NARROWEST --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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:06:28,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:06:28,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:06:28,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:06:28,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:06:28,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:06:28,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:06:28,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:06:28,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:06:28,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:06:28,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:06:28,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:06:28,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:06:28,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:06:28,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:06:28,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:06:28,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:06:28,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:06:28,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:06:28,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:06:28,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:06:28,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:06:28,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:06:28,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:06:28,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:06:28,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:06:28,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:06:28,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:06:28,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:06:28,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:06:28,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:06:28,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:06:28,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:06:28,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:06:28,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:06:28,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:06:28,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:06:28,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:06:28,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:06:28,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:06:28,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:06:28,622 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 [2020-10-13 14:06:28,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:06:28,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:06:28,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:06:28,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:06:28,673 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:06:28,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:06:28,674 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:06:28,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:06:28,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:06:28,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:06:28,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:06:28,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:06:28,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:06:28,675 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:06:28,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:06:28,675 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:06:28,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:06:28,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:06:28,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:06:28,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:06:28,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:06:28,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:06:28,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:06:28,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:06:28,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:06:28,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:06:28,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:06:28,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:06:28,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:06:28,680 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:06:28,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:06:29,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:06:29,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:06:29,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:06:29,011 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:06:29,012 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:06:29,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac8b54f4b/630d7b0ee4ec4159bf0ef6245cb0083a/FLAG2d00e583e [2020-10-13 14:06:29,591 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:06:29,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:06:29,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac8b54f4b/630d7b0ee4ec4159bf0ef6245cb0083a/FLAG2d00e583e [2020-10-13 14:06:29,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac8b54f4b/630d7b0ee4ec4159bf0ef6245cb0083a [2020-10-13 14:06:29,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:06:29,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:06:29,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:06:29,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:06:29,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:06:29,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:06:29" (1/1) ... [2020-10-13 14:06:29,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4122bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:29, skipping insertion in model container [2020-10-13 14:06:29,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:06:29" (1/1) ... [2020-10-13 14:06:29,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:06:29,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:06:30,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:06:30,270 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:06:30,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:06:30,436 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:06:30,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30 WrapperNode [2020-10-13 14:06:30,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:06:30,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:06:30,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:06:30,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:06:30,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (1/1) ... [2020-10-13 14:06:30,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (1/1) ... [2020-10-13 14:06:30,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (1/1) ... [2020-10-13 14:06:30,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (1/1) ... [2020-10-13 14:06:30,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (1/1) ... [2020-10-13 14:06:30,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (1/1) ... [2020-10-13 14:06:30,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (1/1) ... [2020-10-13 14:06:30,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:06:30,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:06:30,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:06:30,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:06:30,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (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 [2020-10-13 14:06:30,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:06:30,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:06:30,560 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:06:30,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:06:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:06:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:06:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:06:30,562 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:06:30,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:06:30,562 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:06:30,563 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:06:30,563 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:06:30,563 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:06:30,564 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:06:30,564 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:06:30,565 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:06:30,565 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:06:30,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:06:30,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:06:30,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:06:31,024 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:06:31,024 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:06:31,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:06:31 BoogieIcfgContainer [2020-10-13 14:06:31,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:06:31,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:06:31,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:06:31,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:06:31,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:06:29" (1/3) ... [2020-10-13 14:06:31,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e32c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:06:31, skipping insertion in model container [2020-10-13 14:06:31,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:30" (2/3) ... [2020-10-13 14:06:31,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e32c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:06:31, skipping insertion in model container [2020-10-13 14:06:31,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:06:31" (3/3) ... [2020-10-13 14:06:31,039 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:06:31,051 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:06:31,060 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:06:31,093 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:06:31,127 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:06:31,128 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:06:31,128 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:06:31,128 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:06:31,129 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:06:31,129 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:06:31,129 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:06:31,130 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:06:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-13 14:06:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 14:06:31,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:31,163 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] [2020-10-13 14:06:31,164 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1803074216, now seen corresponding path program 1 times [2020-10-13 14:06:31,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:31,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981710974] [2020-10-13 14:06:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:31,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:32,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:32,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:32,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 14:06:32,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:06:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1581 [2020-10-13 14:06:32,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:06:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:06:32,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:06:33,249 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 14:06:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:33,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:33,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:33,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:33,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:06:33,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:33,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:33,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981710974] [2020-10-13 14:06:33,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:33,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:06:33,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401767193] [2020-10-13 14:06:33,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:06:33,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:33,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:06:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:06:33,335 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 4 states. [2020-10-13 14:06:33,503 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-13 14:06:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:33,922 INFO L93 Difference]: Finished difference Result 147 states and 231 transitions. [2020-10-13 14:06:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:06:33,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-13 14:06:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:33,936 INFO L225 Difference]: With dead ends: 147 [2020-10-13 14:06:33,937 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 14:06:33,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:06:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 14:06:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-13 14:06:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 14:06:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 134 transitions. [2020-10-13 14:06:33,990 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 134 transitions. Word has length 40 [2020-10-13 14:06:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:33,991 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 134 transitions. [2020-10-13 14:06:33,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:06:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 134 transitions. [2020-10-13 14:06:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 14:06:33,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:33,993 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] [2020-10-13 14:06:33,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:06:33,994 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1722155448, now seen corresponding path program 1 times [2020-10-13 14:06:33,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:33,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793551917] [2020-10-13 14:06:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:34,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:34,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:34,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:35,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:35,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 14:06:35,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:06:35,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1370 [2020-10-13 14:06:35,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:35,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:35,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:06:35,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:06:35,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:35,584 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 14:06:35,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:35,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:35,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:35,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:35,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:35,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:06:35,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:35,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:35,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:35,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:35,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 14:06:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:35,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793551917] [2020-10-13 14:06:35,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:35,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:06:35,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969273645] [2020-10-13 14:06:35,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:06:35,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:06:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:06:35,635 INFO L87 Difference]: Start difference. First operand 93 states and 134 transitions. Second operand 4 states. [2020-10-13 14:06:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:36,139 INFO L93 Difference]: Finished difference Result 217 states and 330 transitions. [2020-10-13 14:06:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:06:36,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 14:06:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:36,144 INFO L225 Difference]: With dead ends: 217 [2020-10-13 14:06:36,144 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 14:06:36,148 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 [2020-10-13 14:06:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 14:06:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-13 14:06:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 14:06:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 216 transitions. [2020-10-13 14:06:36,195 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 216 transitions. Word has length 41 [2020-10-13 14:06:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:36,196 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 216 transitions. [2020-10-13 14:06:36,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:06:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 216 transitions. [2020-10-13 14:06:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 14:06:36,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:36,198 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] [2020-10-13 14:06:36,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:06:36,199 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:36,200 INFO L82 PathProgramCache]: Analyzing trace with hash -832265275, now seen corresponding path program 1 times [2020-10-13 14:06:36,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:36,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105608365] [2020-10-13 14:06:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:36,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:39,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:39,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 14:06:39,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:06:39,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3584 [2020-10-13 14:06:39,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:39,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:39,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:06:39,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:06:39,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:39,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:39,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:39,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:39,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:39,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:39,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:06:39,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:39,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105608365] [2020-10-13 14:06:39,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:39,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:06:39,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213683665] [2020-10-13 14:06:39,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:06:39,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:06:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:06:39,964 INFO L87 Difference]: Start difference. First operand 145 states and 216 transitions. Second operand 4 states. [2020-10-13 14:06:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:40,416 INFO L93 Difference]: Finished difference Result 357 states and 550 transitions. [2020-10-13 14:06:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:06:40,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-13 14:06:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:40,420 INFO L225 Difference]: With dead ends: 357 [2020-10-13 14:06:40,423 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 14:06:40,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:06:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 14:06:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2020-10-13 14:06:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-13 14:06:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 352 transitions. [2020-10-13 14:06:40,472 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 352 transitions. Word has length 42 [2020-10-13 14:06:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:40,473 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 352 transitions. [2020-10-13 14:06:40,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:06:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 352 transitions. [2020-10-13 14:06:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 14:06:40,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:40,476 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] [2020-10-13 14:06:40,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:06:40,477 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash -526265596, now seen corresponding path program 1 times [2020-10-13 14:06:40,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:40,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816818677] [2020-10-13 14:06:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:40,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:40,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:40,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:41,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:45,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:45,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 14:06:45,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:06:45,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:06:45,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:06:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:06:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:06:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:45,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:45,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:45,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:45,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:45,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:45,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:06:45,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:45,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:45,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:45,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816818677] [2020-10-13 14:06:45,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:45,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:06:45,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189489729] [2020-10-13 14:06:45,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:06:45,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:45,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:06:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:06:45,710 INFO L87 Difference]: Start difference. First operand 233 states and 352 transitions. Second operand 7 states. [2020-10-13 14:06:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:46,461 INFO L93 Difference]: Finished difference Result 1901 states and 2960 transitions. [2020-10-13 14:06:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:06:46,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-13 14:06:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:46,477 INFO L225 Difference]: With dead ends: 1901 [2020-10-13 14:06:46,477 INFO L226 Difference]: Without dead ends: 1691 [2020-10-13 14:06:46,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:06:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2020-10-13 14:06:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 641. [2020-10-13 14:06:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-13 14:06:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 988 transitions. [2020-10-13 14:06:46,575 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 988 transitions. Word has length 43 [2020-10-13 14:06:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:46,578 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 988 transitions. [2020-10-13 14:06:46,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:06:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 988 transitions. [2020-10-13 14:06:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 14:06:46,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:46,582 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] [2020-10-13 14:06:46,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:06:46,582 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1926671167, now seen corresponding path program 1 times [2020-10-13 14:06:46,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:46,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532728394] [2020-10-13 14:06:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:46,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:46,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:46,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:47,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:47,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 14:06:47,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:06:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1353 [2020-10-13 14:06:47,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:06:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:06:47,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:06:47,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:48,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:48,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:48,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:48,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:48,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:48,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:06:48,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:48,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:48,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:48,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:06:48,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:48,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532728394] [2020-10-13 14:06:48,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:48,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:06:48,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300448566] [2020-10-13 14:06:48,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:06:48,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:06:48,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:06:48,220 INFO L87 Difference]: Start difference. First operand 641 states and 988 transitions. Second operand 6 states. [2020-10-13 14:06:48,384 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-13 14:06:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:48,704 INFO L93 Difference]: Finished difference Result 1461 states and 2262 transitions. [2020-10-13 14:06:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:06:48,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-13 14:06:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:48,711 INFO L225 Difference]: With dead ends: 1461 [2020-10-13 14:06:48,711 INFO L226 Difference]: Without dead ends: 1047 [2020-10-13 14:06:48,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:06:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2020-10-13 14:06:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 841. [2020-10-13 14:06:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2020-10-13 14:06:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1288 transitions. [2020-10-13 14:06:48,789 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1288 transitions. Word has length 43 [2020-10-13 14:06:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:48,790 INFO L479 AbstractCegarLoop]: Abstraction has 841 states and 1288 transitions. [2020-10-13 14:06:48,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:06:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1288 transitions. [2020-10-13 14:06:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 14:06:48,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:48,791 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] [2020-10-13 14:06:48,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:06:48,791 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:48,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1973295191, now seen corresponding path program 1 times [2020-10-13 14:06:48,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:48,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855130486] [2020-10-13 14:06:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:48,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:50,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:50,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 14:06:50,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:06:50,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-10-13 14:06:50,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:06:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:06:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:06:50,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:50,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:50,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:50,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:50,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:50,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:06:50,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:50,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:50,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855130486] [2020-10-13 14:06:50,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:50,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:06:50,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369077674] [2020-10-13 14:06:50,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:06:50,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:50,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:06:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:06:50,654 INFO L87 Difference]: Start difference. First operand 841 states and 1288 transitions. Second operand 7 states. [2020-10-13 14:06:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:51,674 INFO L93 Difference]: Finished difference Result 6684 states and 10305 transitions. [2020-10-13 14:06:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:06:51,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-13 14:06:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:51,704 INFO L225 Difference]: With dead ends: 6684 [2020-10-13 14:06:51,704 INFO L226 Difference]: Without dead ends: 5866 [2020-10-13 14:06:51,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:06:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2020-10-13 14:06:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 1650. [2020-10-13 14:06:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1650 states. [2020-10-13 14:06:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2515 transitions. [2020-10-13 14:06:51,906 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2515 transitions. Word has length 43 [2020-10-13 14:06:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:51,906 INFO L479 AbstractCegarLoop]: Abstraction has 1650 states and 2515 transitions. [2020-10-13 14:06:51,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:06:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2515 transitions. [2020-10-13 14:06:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 14:06:51,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:51,908 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] [2020-10-13 14:06:51,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:06:51,908 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash -699427186, now seen corresponding path program 1 times [2020-10-13 14:06:51,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:51,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916515869] [2020-10-13 14:06:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:51,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:51,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:52,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:52,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 14:06:52,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:06:52,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-13 14:06:52,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:06:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:06:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:06:52,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:52,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:52,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:52,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:52,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:52,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:06:52,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:52,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:52,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916515869] [2020-10-13 14:06:52,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:52,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:06:52,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312967227] [2020-10-13 14:06:52,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:06:52,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:52,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:06:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:06:52,444 INFO L87 Difference]: Start difference. First operand 1650 states and 2515 transitions. Second operand 6 states. [2020-10-13 14:06:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:53,474 INFO L93 Difference]: Finished difference Result 11358 states and 17401 transitions. [2020-10-13 14:06:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:06:53,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-13 14:06:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:53,523 INFO L225 Difference]: With dead ends: 11358 [2020-10-13 14:06:53,523 INFO L226 Difference]: Without dead ends: 9740 [2020-10-13 14:06:53,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:06:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9740 states. [2020-10-13 14:06:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9740 to 3266. [2020-10-13 14:06:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3266 states. [2020-10-13 14:06:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4867 transitions. [2020-10-13 14:06:53,909 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4867 transitions. Word has length 43 [2020-10-13 14:06:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:53,910 INFO L479 AbstractCegarLoop]: Abstraction has 3266 states and 4867 transitions. [2020-10-13 14:06:53,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:06:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4867 transitions. [2020-10-13 14:06:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 14:06:53,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:53,911 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] [2020-10-13 14:06:53,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:06:53,912 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:53,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1287195208, now seen corresponding path program 1 times [2020-10-13 14:06:53,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:53,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615570013] [2020-10-13 14:06:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:53,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:53,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:54,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:54,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 14:06:54,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:06:54,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-13 14:06:54,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:06:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:06:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:06:54,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:54,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:54,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:54,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:54,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:54,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:06:54,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:54,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:54,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:06:54,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:54,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615570013] [2020-10-13 14:06:54,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:54,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:06:54,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387306887] [2020-10-13 14:06:54,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:06:54,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:06:54,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:06:54,446 INFO L87 Difference]: Start difference. First operand 3266 states and 4867 transitions. Second operand 6 states. [2020-10-13 14:06:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:55,113 INFO L93 Difference]: Finished difference Result 6502 states and 9701 transitions. [2020-10-13 14:06:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:06:55,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-13 14:06:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:55,130 INFO L225 Difference]: With dead ends: 6502 [2020-10-13 14:06:55,130 INFO L226 Difference]: Without dead ends: 3268 [2020-10-13 14:06:55,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:06:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2020-10-13 14:06:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 3257. [2020-10-13 14:06:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3257 states. [2020-10-13 14:06:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4856 transitions. [2020-10-13 14:06:55,396 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4856 transitions. Word has length 45 [2020-10-13 14:06:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:55,396 INFO L479 AbstractCegarLoop]: Abstraction has 3257 states and 4856 transitions. [2020-10-13 14:06:55,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:06:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4856 transitions. [2020-10-13 14:06:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 14:06:55,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:55,397 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] [2020-10-13 14:06:55,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:06:55,398 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash 500905502, now seen corresponding path program 1 times [2020-10-13 14:06:55,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:55,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629199315] [2020-10-13 14:06:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:55,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:55,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:55,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:55,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 14:06:55,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:06:55,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-13 14:06:55,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:06:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:06:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:06:55,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:55,958 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 14:06:55,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:55,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:55,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:55,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:55,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:55,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:06:55,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:55,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629199315] [2020-10-13 14:06:55,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:55,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:06:55,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061987306] [2020-10-13 14:06:55,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:06:55,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:06:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:06:55,994 INFO L87 Difference]: Start difference. First operand 3257 states and 4856 transitions. Second operand 6 states. [2020-10-13 14:06:56,185 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-13 14:06:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:57,354 INFO L93 Difference]: Finished difference Result 12965 states and 19358 transitions. [2020-10-13 14:06:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:06:57,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-13 14:06:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:57,400 INFO L225 Difference]: With dead ends: 12965 [2020-10-13 14:06:57,401 INFO L226 Difference]: Without dead ends: 9731 [2020-10-13 14:06:57,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:06:57,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9731 states. [2020-10-13 14:06:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9731 to 3257. [2020-10-13 14:06:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3257 states. [2020-10-13 14:06:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4792 transitions. [2020-10-13 14:06:57,873 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4792 transitions. Word has length 45 [2020-10-13 14:06:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:57,874 INFO L479 AbstractCegarLoop]: Abstraction has 3257 states and 4792 transitions. [2020-10-13 14:06:57,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:06:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4792 transitions. [2020-10-13 14:06:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 14:06:57,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:57,875 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] [2020-10-13 14:06:57,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:06:57,875 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash 480856159, now seen corresponding path program 1 times [2020-10-13 14:06:57,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:57,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631842454] [2020-10-13 14:06:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:57,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:58,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:58,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:58,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:58,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 14:06:58,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:06:58,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-13 14:06:58,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:58,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:58,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 14:06:58,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:06:58,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:58,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:58,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:58,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:58,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:58,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:06:58,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:58,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:58,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:58,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631842454] [2020-10-13 14:06:58,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:58,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:06:58,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328242660] [2020-10-13 14:06:58,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:06:58,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:58,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:06:58,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:06:58,384 INFO L87 Difference]: Start difference. First operand 3257 states and 4792 transitions. Second operand 4 states. [2020-10-13 14:06:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:58,988 INFO L93 Difference]: Finished difference Result 8221 states and 12026 transitions. [2020-10-13 14:06:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:06:59,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-13 14:06:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:59,073 INFO L225 Difference]: With dead ends: 8221 [2020-10-13 14:06:59,073 INFO L226 Difference]: Without dead ends: 4987 [2020-10-13 14:06:59,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:06:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2020-10-13 14:06:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4985. [2020-10-13 14:06:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4985 states. [2020-10-13 14:06:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 7064 transitions. [2020-10-13 14:06:59,489 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 7064 transitions. Word has length 45 [2020-10-13 14:06:59,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:59,489 INFO L479 AbstractCegarLoop]: Abstraction has 4985 states and 7064 transitions. [2020-10-13 14:06:59,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:06:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 7064 transitions. [2020-10-13 14:06:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 14:06:59,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:59,489 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] [2020-10-13 14:06:59,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:06:59,490 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1653708042, now seen corresponding path program 1 times [2020-10-13 14:06:59,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:59,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217220787] [2020-10-13 14:06:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:59,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 14:06:59,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:06:59,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-13 14:06:59,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:59,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:06:59,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:06:59,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:06:59,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:59,898 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 14:06:59,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:59,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:59,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:59,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:59,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:06:59,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:59,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:59,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217220787] [2020-10-13 14:06:59,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:59,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:06:59,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442559250] [2020-10-13 14:06:59,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:06:59,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:06:59,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:06:59,925 INFO L87 Difference]: Start difference. First operand 4985 states and 7064 transitions. Second operand 5 states. [2020-10-13 14:07:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:01,135 INFO L93 Difference]: Finished difference Result 7939 states and 11223 transitions. [2020-10-13 14:07:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:07:01,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-13 14:07:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:01,156 INFO L225 Difference]: With dead ends: 7939 [2020-10-13 14:07:01,156 INFO L226 Difference]: Without dead ends: 7937 [2020-10-13 14:07:01,160 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 [2020-10-13 14:07:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7937 states. [2020-10-13 14:07:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7937 to 5113. [2020-10-13 14:07:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5113 states. [2020-10-13 14:07:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 7128 transitions. [2020-10-13 14:07:01,688 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 7128 transitions. Word has length 46 [2020-10-13 14:07:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:01,688 INFO L479 AbstractCegarLoop]: Abstraction has 5113 states and 7128 transitions. [2020-10-13 14:07:01,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:07:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 7128 transitions. [2020-10-13 14:07:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 14:07:01,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:01,689 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] [2020-10-13 14:07:01,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:07:01,690 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2031258738, now seen corresponding path program 1 times [2020-10-13 14:07:01,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:01,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278520652] [2020-10-13 14:07:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:01,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:01,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 14:07:01,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:07:01,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-13 14:07:01,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:07:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:07:01,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:02,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:02,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:02,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:02,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:02,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:02,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:07:02,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:02,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:02,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278520652] [2020-10-13 14:07:02,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:02,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:02,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815504944] [2020-10-13 14:07:02,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:02,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:02,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:02,048 INFO L87 Difference]: Start difference. First operand 5113 states and 7128 transitions. Second operand 4 states. [2020-10-13 14:07:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:02,716 INFO L93 Difference]: Finished difference Result 10975 states and 15324 transitions. [2020-10-13 14:07:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:07:02,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-13 14:07:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:02,732 INFO L225 Difference]: With dead ends: 10975 [2020-10-13 14:07:02,732 INFO L226 Difference]: Without dead ends: 5885 [2020-10-13 14:07:02,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:07:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2020-10-13 14:07:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5883. [2020-10-13 14:07:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5883 states. [2020-10-13 14:07:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5883 states to 5883 states and 8170 transitions. [2020-10-13 14:07:03,354 INFO L78 Accepts]: Start accepts. Automaton has 5883 states and 8170 transitions. Word has length 46 [2020-10-13 14:07:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:03,354 INFO L479 AbstractCegarLoop]: Abstraction has 5883 states and 8170 transitions. [2020-10-13 14:07:03,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:07:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5883 states and 8170 transitions. [2020-10-13 14:07:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:07:03,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:03,356 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:07:03,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:07:03,357 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash 740373513, now seen corresponding path program 1 times [2020-10-13 14:07:03,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:03,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663983358] [2020-10-13 14:07:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:03,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:03,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:03,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:03,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:05,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:06,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:06,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:08,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:08,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:07:08,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:07:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:07:08,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:07:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:07:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:07:08,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:08,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:08,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:08,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:08,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:08,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:07:08,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:08,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:08,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:08,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:07:08,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:07:08,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663983358] [2020-10-13 14:07:08,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:08,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:07:08,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511699083] [2020-10-13 14:07:08,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:07:08,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:08,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:07:08,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:07:08,554 INFO L87 Difference]: Start difference. First operand 5883 states and 8170 transitions. Second operand 6 states. [2020-10-13 14:07:08,712 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 14:07:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:09,491 INFO L93 Difference]: Finished difference Result 10207 states and 14125 transitions. [2020-10-13 14:07:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:07:09,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-13 14:07:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:09,499 INFO L225 Difference]: With dead ends: 10207 [2020-10-13 14:07:09,499 INFO L226 Difference]: Without dead ends: 4349 [2020-10-13 14:07:09,512 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 [2020-10-13 14:07:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2020-10-13 14:07:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 2983. [2020-10-13 14:07:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2983 states. [2020-10-13 14:07:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 4126 transitions. [2020-10-13 14:07:09,816 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 4126 transitions. Word has length 64 [2020-10-13 14:07:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:09,816 INFO L479 AbstractCegarLoop]: Abstraction has 2983 states and 4126 transitions. [2020-10-13 14:07:09,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:07:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 4126 transitions. [2020-10-13 14:07:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:07:09,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:09,820 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:07:09,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:07:09,820 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:09,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1060358588, now seen corresponding path program 1 times [2020-10-13 14:07:09,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:09,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513187793] [2020-10-13 14:07:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:09,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:10,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:10,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:11,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:11,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:12,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:12,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:12,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:14,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:14,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:07:14,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:07:14,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:07:14,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:07:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:07:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:07:14,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:15,042 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2020-10-13 14:07:15,211 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 14:07:15,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:15,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:15,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:15,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:15,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:15,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:07:15,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:15,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:15,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:15,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:15,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:07:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:15,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513187793] [2020-10-13 14:07:15,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:07:15,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:07:15,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638756705] [2020-10-13 14:07:15,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:07:15,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:07:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:07:15,257 INFO L87 Difference]: Start difference. First operand 2983 states and 4126 transitions. Second operand 9 states. [2020-10-13 14:07:15,466 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-13 14:07:17,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:17,932 INFO L93 Difference]: Finished difference Result 14705 states and 20158 transitions. [2020-10-13 14:07:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:07:17,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-13 14:07:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:17,946 INFO L225 Difference]: With dead ends: 14705 [2020-10-13 14:07:17,946 INFO L226 Difference]: Without dead ends: 12135 [2020-10-13 14:07:17,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:07:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12135 states. [2020-10-13 14:07:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12135 to 6359. [2020-10-13 14:07:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6359 states. [2020-10-13 14:07:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6359 states to 6359 states and 8778 transitions. [2020-10-13 14:07:18,751 INFO L78 Accepts]: Start accepts. Automaton has 6359 states and 8778 transitions. Word has length 64 [2020-10-13 14:07:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:18,751 INFO L479 AbstractCegarLoop]: Abstraction has 6359 states and 8778 transitions. [2020-10-13 14:07:18,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:07:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6359 states and 8778 transitions. [2020-10-13 14:07:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:07:18,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:18,754 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:07:18,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:07:18,754 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1432884482, now seen corresponding path program 1 times [2020-10-13 14:07:18,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:18,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685454624] [2020-10-13 14:07:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:18,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:18,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:19,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:19,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:19,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:19,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:19,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:21,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:21,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:21,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:21,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:23,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:23,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:07:23,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:07:23,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:07:23,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:07:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:07:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:07:23,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:24,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:24,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:24,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:24,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:24,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:24,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:07:24,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:24,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:24,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:24,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:24,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685454624] [2020-10-13 14:07:24,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:07:24,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:07:24,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712241786] [2020-10-13 14:07:24,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:07:24,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:07:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:07:24,113 INFO L87 Difference]: Start difference. First operand 6359 states and 8778 transitions. Second operand 12 states. [2020-10-13 14:07:24,363 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:07:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:29,427 INFO L93 Difference]: Finished difference Result 27942 states and 37852 transitions. [2020-10-13 14:07:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 14:07:29,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-10-13 14:07:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:29,452 INFO L225 Difference]: With dead ends: 27942 [2020-10-13 14:07:29,452 INFO L226 Difference]: Without dead ends: 22460 [2020-10-13 14:07:29,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=556, Invalid=2750, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 14:07:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22460 states. [2020-10-13 14:07:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22460 to 10159. [2020-10-13 14:07:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10159 states. [2020-10-13 14:07:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10159 states to 10159 states and 13928 transitions. [2020-10-13 14:07:30,818 INFO L78 Accepts]: Start accepts. Automaton has 10159 states and 13928 transitions. Word has length 64 [2020-10-13 14:07:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:30,818 INFO L479 AbstractCegarLoop]: Abstraction has 10159 states and 13928 transitions. [2020-10-13 14:07:30,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:07:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10159 states and 13928 transitions. [2020-10-13 14:07:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:07:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:30,820 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:07:30,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:07:30,820 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash 93221914, now seen corresponding path program 1 times [2020-10-13 14:07:30,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:30,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897340256] [2020-10-13 14:07:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:33,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:35,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:35,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:07:35,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:07:35,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:07:35,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:35,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:07:35,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:07:35,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:07:35,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:36,110 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-13 14:07:36,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:36,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:36,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:36,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:36,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:36,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:07:36,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:36,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:36,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:36,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:36,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:36,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897340256] [2020-10-13 14:07:36,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:07:36,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:07:36,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437779908] [2020-10-13 14:07:36,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:07:36,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:07:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:07:36,294 INFO L87 Difference]: Start difference. First operand 10159 states and 13928 transitions. Second operand 12 states. [2020-10-13 14:07:36,471 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 14:07:40,199 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-13 14:07:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:45,501 INFO L93 Difference]: Finished difference Result 41963 states and 56145 transitions. [2020-10-13 14:07:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 14:07:45,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-13 14:07:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:45,536 INFO L225 Difference]: With dead ends: 41963 [2020-10-13 14:07:45,536 INFO L226 Difference]: Without dead ends: 31829 [2020-10-13 14:07:45,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=680, Invalid=3480, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 14:07:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31829 states. [2020-10-13 14:07:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31829 to 16739. [2020-10-13 14:07:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16739 states. [2020-10-13 14:07:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16739 states to 16739 states and 22941 transitions. [2020-10-13 14:07:47,947 INFO L78 Accepts]: Start accepts. Automaton has 16739 states and 22941 transitions. Word has length 65 [2020-10-13 14:07:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:47,948 INFO L479 AbstractCegarLoop]: Abstraction has 16739 states and 22941 transitions. [2020-10-13 14:07:47,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:07:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 16739 states and 22941 transitions. [2020-10-13 14:07:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:07:47,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:47,950 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:07:47,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:07:47,951 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash 116967136, now seen corresponding path program 1 times [2020-10-13 14:07:47,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:47,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414101293] [2020-10-13 14:07:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:47,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:52,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:52,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:07:52,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:07:52,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:07:52,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:52,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:07:52,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:07:52,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:07:52,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:53,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:53,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:53,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:53,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:53,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:53,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:07:53,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:53,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:53,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:53,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:53,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:53,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414101293] [2020-10-13 14:07:53,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:07:53,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:07:53,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884161032] [2020-10-13 14:07:53,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:07:53,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:53,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:07:53,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:07:53,340 INFO L87 Difference]: Start difference. First operand 16739 states and 22941 transitions. Second operand 13 states. [2020-10-13 14:07:53,646 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 104 [2020-10-13 14:07:54,227 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-13 14:07:55,007 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-13 14:07:56,519 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-13 14:07:56,683 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-13 14:07:58,248 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-13 14:08:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:04,029 INFO L93 Difference]: Finished difference Result 42418 states and 57813 transitions. [2020-10-13 14:08:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 14:08:04,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-13 14:08:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:04,064 INFO L225 Difference]: With dead ends: 42418 [2020-10-13 14:08:04,065 INFO L226 Difference]: Without dead ends: 33522 [2020-10-13 14:08:04,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=429, Invalid=1733, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 14:08:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33522 states. [2020-10-13 14:08:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33522 to 16803. [2020-10-13 14:08:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16803 states. [2020-10-13 14:08:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 23021 transitions. [2020-10-13 14:08:06,479 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 23021 transitions. Word has length 65 [2020-10-13 14:08:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:06,479 INFO L479 AbstractCegarLoop]: Abstraction has 16803 states and 23021 transitions. [2020-10-13 14:08:06,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:08:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 23021 transitions. [2020-10-13 14:08:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:08:06,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:06,481 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:06,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:08:06,481 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1084998967, now seen corresponding path program 1 times [2020-10-13 14:08:06,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:06,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110748552] [2020-10-13 14:08:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:06,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:10,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:10,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:08:10,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:08:10,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4326 [2020-10-13 14:08:10,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:10,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:08:10,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 14:08:10,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:08:10,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:10,986 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 14:08:10,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:10,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:10,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:10,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:10,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:10,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:10,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:10,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:11,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110748552] [2020-10-13 14:08:11,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:11,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:08:11,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583543920] [2020-10-13 14:08:11,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:08:11,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:08:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:11,002 INFO L87 Difference]: Start difference. First operand 16803 states and 23021 transitions. Second operand 4 states. [2020-10-13 14:08:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:13,542 INFO L93 Difference]: Finished difference Result 33583 states and 46018 transitions. [2020-10-13 14:08:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:08:13,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:08:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:13,562 INFO L225 Difference]: With dead ends: 33583 [2020-10-13 14:08:13,563 INFO L226 Difference]: Without dead ends: 16805 [2020-10-13 14:08:13,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2020-10-13 14:08:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 16551. [2020-10-13 14:08:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16551 states. [2020-10-13 14:08:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16551 states to 16551 states and 22381 transitions. [2020-10-13 14:08:16,037 INFO L78 Accepts]: Start accepts. Automaton has 16551 states and 22381 transitions. Word has length 65 [2020-10-13 14:08:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:16,038 INFO L479 AbstractCegarLoop]: Abstraction has 16551 states and 22381 transitions. [2020-10-13 14:08:16,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:08:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 16551 states and 22381 transitions. [2020-10-13 14:08:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:08:16,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:16,039 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:16,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:08:16,039 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:16,040 INFO L82 PathProgramCache]: Analyzing trace with hash -104444809, now seen corresponding path program 1 times [2020-10-13 14:08:16,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:16,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603030655] [2020-10-13 14:08:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:16,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:16,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:16,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:16,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:21,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:21,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:08:21,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:08:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:08:21,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:21,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:08:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:08:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:08:21,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:21,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:21,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:21,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:21,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:21,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:21,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:21,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:21,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:21,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:21,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:21,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:21,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603030655] [2020-10-13 14:08:21,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:08:21,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:08:21,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692582613] [2020-10-13 14:08:21,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:08:21,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:08:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:08:21,311 INFO L87 Difference]: Start difference. First operand 16551 states and 22381 transitions. Second operand 10 states. [2020-10-13 14:08:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:26,853 INFO L93 Difference]: Finished difference Result 41500 states and 55870 transitions. [2020-10-13 14:08:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:08:26,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-13 14:08:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:26,892 INFO L225 Difference]: With dead ends: 41500 [2020-10-13 14:08:26,892 INFO L226 Difference]: Without dead ends: 26901 [2020-10-13 14:08:26,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:08:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26901 states. [2020-10-13 14:08:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26901 to 16559. [2020-10-13 14:08:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16559 states. [2020-10-13 14:08:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16559 states to 16559 states and 22411 transitions. [2020-10-13 14:08:30,383 INFO L78 Accepts]: Start accepts. Automaton has 16559 states and 22411 transitions. Word has length 65 [2020-10-13 14:08:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:30,383 INFO L479 AbstractCegarLoop]: Abstraction has 16559 states and 22411 transitions. [2020-10-13 14:08:30,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:08:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 16559 states and 22411 transitions. [2020-10-13 14:08:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:08:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:30,385 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:30,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:08:30,385 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1872714208, now seen corresponding path program 1 times [2020-10-13 14:08:30,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:30,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953548026] [2020-10-13 14:08:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:34,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3975 [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:08:34,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:34,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:34,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:34,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:34,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:34,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:34,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:34,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:34,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:34,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953548026] [2020-10-13 14:08:34,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:34,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:08:34,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735788659] [2020-10-13 14:08:34,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:08:34,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:34,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:08:34,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:34,504 INFO L87 Difference]: Start difference. First operand 16559 states and 22411 transitions. Second operand 4 states. [2020-10-13 14:08:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:36,098 INFO L93 Difference]: Finished difference Result 24812 states and 33487 transitions. [2020-10-13 14:08:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:08:36,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:08:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:36,108 INFO L225 Difference]: With dead ends: 24812 [2020-10-13 14:08:36,108 INFO L226 Difference]: Without dead ends: 8278 [2020-10-13 14:08:36,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2020-10-13 14:08:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 7568. [2020-10-13 14:08:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7568 states. [2020-10-13 14:08:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7568 states to 7568 states and 9982 transitions. [2020-10-13 14:08:37,325 INFO L78 Accepts]: Start accepts. Automaton has 7568 states and 9982 transitions. Word has length 65 [2020-10-13 14:08:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:37,325 INFO L479 AbstractCegarLoop]: Abstraction has 7568 states and 9982 transitions. [2020-10-13 14:08:37,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:08:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7568 states and 9982 transitions. [2020-10-13 14:08:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:08:37,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:37,327 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:37,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:08:37,328 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:37,328 INFO L82 PathProgramCache]: Analyzing trace with hash 6122773, now seen corresponding path program 1 times [2020-10-13 14:08:37,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:37,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544832238] [2020-10-13 14:08:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:37,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:37,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:37,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:37,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:42,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:42,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:08:42,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:08:42,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:08:42,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:08:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:08:42,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:08:42,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:42,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:42,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:42,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:42,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:42,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:42,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:08:42,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:42,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:42,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:42,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:42,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:08:42,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544832238] [2020-10-13 14:08:42,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:42,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:08:42,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22431595] [2020-10-13 14:08:42,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:08:42,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:42,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:08:42,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:42,451 INFO L87 Difference]: Start difference. First operand 7568 states and 9982 transitions. Second operand 4 states. [2020-10-13 14:08:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:43,247 INFO L93 Difference]: Finished difference Result 11223 states and 14878 transitions. [2020-10-13 14:08:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:08:43,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:08:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:43,252 INFO L225 Difference]: With dead ends: 11223 [2020-10-13 14:08:43,252 INFO L226 Difference]: Without dead ends: 3739 [2020-10-13 14:08:43,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2020-10-13 14:08:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3579. [2020-10-13 14:08:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3579 states. [2020-10-13 14:08:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 4723 transitions. [2020-10-13 14:08:43,825 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 4723 transitions. Word has length 65 [2020-10-13 14:08:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:43,825 INFO L479 AbstractCegarLoop]: Abstraction has 3579 states and 4723 transitions. [2020-10-13 14:08:43,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:08:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 4723 transitions. [2020-10-13 14:08:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:08:43,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:43,826 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:43,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:08:43,826 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:43,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:43,827 INFO L82 PathProgramCache]: Analyzing trace with hash -627065804, now seen corresponding path program 1 times [2020-10-13 14:08:43,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:43,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934849786] [2020-10-13 14:08:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:43,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:43,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:43,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:44,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:45,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:45,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:08:45,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:08:45,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1941 [2020-10-13 14:08:45,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:45,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:08:45,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:08:45,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:08:45,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:45,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:45,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:45,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:45,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:45,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:45,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:08:45,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:45,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:45,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:45,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:45,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:45,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934849786] [2020-10-13 14:08:45,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:45,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:08:45,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068905350] [2020-10-13 14:08:45,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:08:45,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:08:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:45,927 INFO L87 Difference]: Start difference. First operand 3579 states and 4723 transitions. Second operand 4 states. [2020-10-13 14:08:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:46,491 INFO L93 Difference]: Finished difference Result 5176 states and 6794 transitions. [2020-10-13 14:08:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:08:46,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:08:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:46,496 INFO L225 Difference]: With dead ends: 5176 [2020-10-13 14:08:46,496 INFO L226 Difference]: Without dead ends: 1701 [2020-10-13 14:08:46,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:08:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-10-13 14:08:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-10-13 14:08:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-10-13 14:08:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2158 transitions. [2020-10-13 14:08:46,782 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2158 transitions. Word has length 66 [2020-10-13 14:08:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:46,782 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2158 transitions. [2020-10-13 14:08:46,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:08:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2158 transitions. [2020-10-13 14:08:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:08:46,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:46,783 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:46,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:08:46,784 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash -214304268, now seen corresponding path program 1 times [2020-10-13 14:08:46,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:46,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072082808] [2020-10-13 14:08:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:49,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:08:49,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:08:49,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2639 [2020-10-13 14:08:49,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:08:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:08:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:08:49,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:49,691 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-13 14:08:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:49,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:49,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:49,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:49,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:49,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:49,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072082808] [2020-10-13 14:08:49,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:08:49,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:08:49,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085333339] [2020-10-13 14:08:49,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:08:49,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:49,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:08:49,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:08:49,934 INFO L87 Difference]: Start difference. First operand 1699 states and 2158 transitions. Second operand 13 states. [2020-10-13 14:08:50,453 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-13 14:08:50,653 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-13 14:08:50,781 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-13 14:08:50,943 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-13 14:08:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:51,876 INFO L93 Difference]: Finished difference Result 4097 states and 5256 transitions. [2020-10-13 14:08:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 14:08:51,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-13 14:08:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:51,879 INFO L225 Difference]: With dead ends: 4097 [2020-10-13 14:08:51,879 INFO L226 Difference]: Without dead ends: 2502 [2020-10-13 14:08:51,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:08:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2020-10-13 14:08:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1697. [2020-10-13 14:08:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1697 states. [2020-10-13 14:08:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2157 transitions. [2020-10-13 14:08:52,174 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2157 transitions. Word has length 66 [2020-10-13 14:08:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:52,174 INFO L479 AbstractCegarLoop]: Abstraction has 1697 states and 2157 transitions. [2020-10-13 14:08:52,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:08:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2157 transitions. [2020-10-13 14:08:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:08:52,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:52,176 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:52,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:08:52,176 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash 7174551, now seen corresponding path program 1 times [2020-10-13 14:08:52,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:52,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794067598] [2020-10-13 14:08:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:52,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:52,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:52,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:55,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:55,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:08:55,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:08:55,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3506 [2020-10-13 14:08:55,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:08:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 14:08:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:08:55,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:55,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:55,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:55,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:55,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:55,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:55,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:55,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:55,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794067598] [2020-10-13 14:08:55,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:08:55,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 14:08:55,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267131306] [2020-10-13 14:08:55,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:08:55,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:55,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:08:55,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:55,824 INFO L87 Difference]: Start difference. First operand 1697 states and 2157 transitions. Second operand 6 states. [2020-10-13 14:08:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:56,785 INFO L93 Difference]: Finished difference Result 4511 states and 5827 transitions. [2020-10-13 14:08:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:08:56,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:08:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:56,788 INFO L225 Difference]: With dead ends: 4511 [2020-10-13 14:08:56,789 INFO L226 Difference]: Without dead ends: 2916 [2020-10-13 14:08:56,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:08:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2020-10-13 14:08:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2912. [2020-10-13 14:08:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2912 states. [2020-10-13 14:08:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3710 transitions. [2020-10-13 14:08:57,302 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3710 transitions. Word has length 66 [2020-10-13 14:08:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:57,302 INFO L479 AbstractCegarLoop]: Abstraction has 2912 states and 3710 transitions. [2020-10-13 14:08:57,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:08:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3710 transitions. [2020-10-13 14:08:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:08:57,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:57,304 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:08:57,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 14:08:57,304 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2118160, now seen corresponding path program 1 times [2020-10-13 14:08:57,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:57,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194145079] [2020-10-13 14:08:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:57,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:57,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:57,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:57,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:57,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:58,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:58,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:08:58,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:08:58,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1418 [2020-10-13 14:08:58,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:08:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:08:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:08:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:59,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:59,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:59,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:59,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:59,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:08:59,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:59,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:59,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194145079] [2020-10-13 14:08:59,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:08:59,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:08:59,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378220729] [2020-10-13 14:08:59,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:08:59,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:08:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:08:59,158 INFO L87 Difference]: Start difference. First operand 2912 states and 3710 transitions. Second operand 13 states. [2020-10-13 14:08:59,490 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 105 [2020-10-13 14:09:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:01,769 INFO L93 Difference]: Finished difference Result 5839 states and 7378 transitions. [2020-10-13 14:09:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 14:09:01,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-13 14:09:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:01,774 INFO L225 Difference]: With dead ends: 5839 [2020-10-13 14:09:01,774 INFO L226 Difference]: Without dead ends: 4240 [2020-10-13 14:09:01,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:09:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2020-10-13 14:09:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 2965. [2020-10-13 14:09:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2020-10-13 14:09:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3764 transitions. [2020-10-13 14:09:02,366 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3764 transitions. Word has length 67 [2020-10-13 14:09:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:02,366 INFO L479 AbstractCegarLoop]: Abstraction has 2965 states and 3764 transitions. [2020-10-13 14:09:02,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:09:02,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3764 transitions. [2020-10-13 14:09:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:09:02,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:02,367 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:02,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 14:09:02,368 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:02,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1684562787, now seen corresponding path program 1 times [2020-10-13 14:09:02,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:02,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726916522] [2020-10-13 14:09:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:03,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:03,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:09:03,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:09:03,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-13 14:09:03,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:09:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:09:03,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:03,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:03,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:03,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:03,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:03,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:09:03,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:03,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726916522] [2020-10-13 14:09:03,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:09:03,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:09:03,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569748840] [2020-10-13 14:09:03,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:09:03,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:03,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:09:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:09:03,565 INFO L87 Difference]: Start difference. First operand 2965 states and 3764 transitions. Second operand 10 states. [2020-10-13 14:09:03,726 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:09:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:05,299 INFO L93 Difference]: Finished difference Result 6974 states and 8917 transitions. [2020-10-13 14:09:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:09:05,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-13 14:09:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:05,304 INFO L225 Difference]: With dead ends: 6974 [2020-10-13 14:09:05,305 INFO L226 Difference]: Without dead ends: 4116 [2020-10-13 14:09:05,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-13 14:09:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2020-10-13 14:09:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 2975. [2020-10-13 14:09:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2975 states. [2020-10-13 14:09:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 3776 transitions. [2020-10-13 14:09:05,871 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 3776 transitions. Word has length 67 [2020-10-13 14:09:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:05,872 INFO L479 AbstractCegarLoop]: Abstraction has 2975 states and 3776 transitions. [2020-10-13 14:09:05,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:09:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 3776 transitions. [2020-10-13 14:09:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:09:05,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:05,873 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:05,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 14:09:05,874 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:05,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1009588054, now seen corresponding path program 1 times [2020-10-13 14:09:05,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:05,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069582697] [2020-10-13 14:09:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:05,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:05,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:05,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:06,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:06,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:06,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:06,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:10,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:10,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:09:10,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:09:10,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:09:10,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:10,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:09:10,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:10,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:09:10,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:11,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:11,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:11,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:11,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:09:11,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:11,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:11,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:11,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:11,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:11,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069582697] [2020-10-13 14:09:11,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:09:11,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:09:11,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108663136] [2020-10-13 14:09:11,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:09:11,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:11,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:09:11,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:09:11,191 INFO L87 Difference]: Start difference. First operand 2975 states and 3776 transitions. Second operand 9 states. [2020-10-13 14:09:11,391 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-13 14:09:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:13,000 INFO L93 Difference]: Finished difference Result 7096 states and 9035 transitions. [2020-10-13 14:09:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 14:09:13,001 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-13 14:09:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:13,006 INFO L225 Difference]: With dead ends: 7096 [2020-10-13 14:09:13,006 INFO L226 Difference]: Without dead ends: 4238 [2020-10-13 14:09:13,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-13 14:09:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2020-10-13 14:09:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 2967. [2020-10-13 14:09:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-10-13 14:09:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3766 transitions. [2020-10-13 14:09:13,576 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3766 transitions. Word has length 67 [2020-10-13 14:09:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:13,576 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3766 transitions. [2020-10-13 14:09:13,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:09:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3766 transitions. [2020-10-13 14:09:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:09:13,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:13,577 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:13,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 14:09:13,578 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1069256555, now seen corresponding path program 1 times [2020-10-13 14:09:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:13,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595476311] [2020-10-13 14:09:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:13,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:13,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:13,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:14,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:14,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:14,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:16,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3266 [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 14:09:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:16,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:16,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 14:09:16,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595476311] [2020-10-13 14:09:16,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:16,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:09:16,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767353759] [2020-10-13 14:09:16,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:09:16,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:09:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:16,961 INFO L87 Difference]: Start difference. First operand 2967 states and 3766 transitions. Second operand 4 states. [2020-10-13 14:09:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:17,701 INFO L93 Difference]: Finished difference Result 5804 states and 7395 transitions. [2020-10-13 14:09:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:09:17,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 14:09:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:17,705 INFO L225 Difference]: With dead ends: 5804 [2020-10-13 14:09:17,705 INFO L226 Difference]: Without dead ends: 2917 [2020-10-13 14:09:17,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2020-10-13 14:09:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2917. [2020-10-13 14:09:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2917 states. [2020-10-13 14:09:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 3672 transitions. [2020-10-13 14:09:18,249 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 3672 transitions. Word has length 67 [2020-10-13 14:09:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:18,249 INFO L479 AbstractCegarLoop]: Abstraction has 2917 states and 3672 transitions. [2020-10-13 14:09:18,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:09:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 3672 transitions. [2020-10-13 14:09:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:09:18,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:18,250 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:18,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 14:09:18,250 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash -295536710, now seen corresponding path program 1 times [2020-10-13 14:09:18,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:18,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657670607] [2020-10-13 14:09:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:19,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:19,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:09:19,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:09:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 963 [2020-10-13 14:09:19,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:09:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:19,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:09:19,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:19,408 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-13 14:09:19,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:19,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:19,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:19,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:19,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:19,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:09:19,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:19,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:19,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:19,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657670607] [2020-10-13 14:09:19,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:09:19,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:09:19,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437951786] [2020-10-13 14:09:19,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:09:19,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:19,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:09:19,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:09:19,558 INFO L87 Difference]: Start difference. First operand 2917 states and 3672 transitions. Second operand 9 states. [2020-10-13 14:09:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:21,907 INFO L93 Difference]: Finished difference Result 7626 states and 9528 transitions. [2020-10-13 14:09:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 14:09:21,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-13 14:09:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:21,912 INFO L225 Difference]: With dead ends: 7626 [2020-10-13 14:09:21,913 INFO L226 Difference]: Without dead ends: 4789 [2020-10-13 14:09:21,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-10-13 14:09:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2020-10-13 14:09:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 2954. [2020-10-13 14:09:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-10-13 14:09:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 3709 transitions. [2020-10-13 14:09:22,501 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 3709 transitions. Word has length 68 [2020-10-13 14:09:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:22,501 INFO L479 AbstractCegarLoop]: Abstraction has 2954 states and 3709 transitions. [2020-10-13 14:09:22,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:09:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 3709 transitions. [2020-10-13 14:09:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:09:22,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:22,502 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:22,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 14:09:22,503 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash -274162354, now seen corresponding path program 1 times [2020-10-13 14:09:22,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:22,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745896017] [2020-10-13 14:09:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:22,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:23,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:23,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:09:23,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:09:23,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-13 14:09:23,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 14:09:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:09:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:09:23,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:24,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:24,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:24,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:24,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:24,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:24,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:24,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745896017] [2020-10-13 14:09:24,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:09:24,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 14:09:24,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62369684] [2020-10-13 14:09:24,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 14:09:24,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 14:09:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-13 14:09:24,370 INFO L87 Difference]: Start difference. First operand 2954 states and 3709 transitions. Second operand 21 states. [2020-10-13 14:09:24,605 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-13 14:09:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:26,573 INFO L93 Difference]: Finished difference Result 4645 states and 5852 transitions. [2020-10-13 14:09:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:09:26,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-10-13 14:09:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:26,577 INFO L225 Difference]: With dead ends: 4645 [2020-10-13 14:09:26,577 INFO L226 Difference]: Without dead ends: 3060 [2020-10-13 14:09:26,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 14:09:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2020-10-13 14:09:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2965. [2020-10-13 14:09:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2020-10-13 14:09:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3721 transitions. [2020-10-13 14:09:27,151 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3721 transitions. Word has length 68 [2020-10-13 14:09:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:27,151 INFO L479 AbstractCegarLoop]: Abstraction has 2965 states and 3721 transitions. [2020-10-13 14:09:27,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 14:09:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3721 transitions. [2020-10-13 14:09:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:09:27,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:27,152 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:27,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 14:09:27,152 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -720620648, now seen corresponding path program 1 times [2020-10-13 14:09:27,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:27,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565734149] [2020-10-13 14:09:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:27,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:27,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:27,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:27,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:09:27,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:09:27,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-13 14:09:27,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:27,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:09:27,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:09:27,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 14:09:27,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:27,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:27,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:27,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:27,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:27,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:27,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:27,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 14:09:27,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565734149] [2020-10-13 14:09:27,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:27,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:09:27,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330534667] [2020-10-13 14:09:27,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:09:27,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:09:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:27,386 INFO L87 Difference]: Start difference. First operand 2965 states and 3721 transitions. Second operand 4 states. [2020-10-13 14:09:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:28,071 INFO L93 Difference]: Finished difference Result 5358 states and 6749 transitions. [2020-10-13 14:09:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:09:28,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-13 14:09:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:28,074 INFO L225 Difference]: With dead ends: 5358 [2020-10-13 14:09:28,075 INFO L226 Difference]: Without dead ends: 2460 [2020-10-13 14:09:28,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2020-10-13 14:09:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2460. [2020-10-13 14:09:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2460 states. [2020-10-13 14:09:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3056 transitions. [2020-10-13 14:09:28,552 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3056 transitions. Word has length 68 [2020-10-13 14:09:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:28,552 INFO L479 AbstractCegarLoop]: Abstraction has 2460 states and 3056 transitions. [2020-10-13 14:09:28,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:09:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3056 transitions. [2020-10-13 14:09:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:09:28,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:28,553 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:28,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 14:09:28,553 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash -911528732, now seen corresponding path program 1 times [2020-10-13 14:09:28,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:28,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495598365] [2020-10-13 14:09:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:28,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:09:28,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:09:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-13 14:09:28,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:09:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:09:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:09:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:28,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:28,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:28,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:28,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:28,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:28,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:28,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 14:09:28,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495598365] [2020-10-13 14:09:28,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:09:28,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 14:09:28,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231539464] [2020-10-13 14:09:28,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:09:28,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:28,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:09:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:09:28,793 INFO L87 Difference]: Start difference. First operand 2460 states and 3056 transitions. Second operand 5 states. [2020-10-13 14:09:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:29,708 INFO L93 Difference]: Finished difference Result 5164 states and 6407 transitions. [2020-10-13 14:09:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:09:29,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 14:09:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:29,712 INFO L225 Difference]: With dead ends: 5164 [2020-10-13 14:09:29,712 INFO L226 Difference]: Without dead ends: 2771 [2020-10-13 14:09:29,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:09:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2020-10-13 14:09:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2721. [2020-10-13 14:09:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2721 states. [2020-10-13 14:09:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3338 transitions. [2020-10-13 14:09:30,323 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3338 transitions. Word has length 69 [2020-10-13 14:09:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:30,323 INFO L479 AbstractCegarLoop]: Abstraction has 2721 states and 3338 transitions. [2020-10-13 14:09:30,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:09:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3338 transitions. [2020-10-13 14:09:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:09:30,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:30,324 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:09:30,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 14:09:30,325 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:30,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1089265319, now seen corresponding path program 1 times [2020-10-13 14:09:30,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:30,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589335738] [2020-10-13 14:09:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:30,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 14:09:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:30,727 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 24 [2020-10-13 14:09:30,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:30,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:30,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:30,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:30,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589335738] [2020-10-13 14:09:30,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:09:30,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:09:30,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955675136] [2020-10-13 14:09:30,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:09:30,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:09:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:09:30,879 INFO L87 Difference]: Start difference. First operand 2721 states and 3338 transitions. Second operand 10 states. [2020-10-13 14:09:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:32,706 INFO L93 Difference]: Finished difference Result 6205 states and 7627 transitions. [2020-10-13 14:09:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 14:09:32,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-13 14:09:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:32,711 INFO L225 Difference]: With dead ends: 6205 [2020-10-13 14:09:32,711 INFO L226 Difference]: Without dead ends: 3687 [2020-10-13 14:09:32,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 14:09:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2020-10-13 14:09:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2679. [2020-10-13 14:09:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2679 states. [2020-10-13 14:09:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3284 transitions. [2020-10-13 14:09:33,294 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3284 transitions. Word has length 69 [2020-10-13 14:09:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:33,295 INFO L479 AbstractCegarLoop]: Abstraction has 2679 states and 3284 transitions. [2020-10-13 14:09:33,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:09:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3284 transitions. [2020-10-13 14:09:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:09:33,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:33,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-13 14:09:33,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 14:09:33,297 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -667189867, now seen corresponding path program 1 times [2020-10-13 14:09:33,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:33,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754593194] [2020-10-13 14:09:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:33,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:36,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:36,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:36,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:36,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:38,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:09:38,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:09:38,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:09:38,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:09:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 14:09:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:09:38,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:38,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:38,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:38,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:38,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:38,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:38,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:38,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:38,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:38,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:38,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 14:09:38,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754593194] [2020-10-13 14:09:38,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:38,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:09:38,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320445381] [2020-10-13 14:09:38,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:09:38,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:38,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:09:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:09:38,443 INFO L87 Difference]: Start difference. First operand 2679 states and 3284 transitions. Second operand 5 states. [2020-10-13 14:09:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:39,934 INFO L93 Difference]: Finished difference Result 4490 states and 5561 transitions. [2020-10-13 14:09:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:09:39,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-13 14:09:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:39,938 INFO L225 Difference]: With dead ends: 4490 [2020-10-13 14:09:39,938 INFO L226 Difference]: Without dead ends: 2890 [2020-10-13 14:09:39,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:09:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2020-10-13 14:09:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1862. [2020-10-13 14:09:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1862 states. [2020-10-13 14:09:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2248 transitions. [2020-10-13 14:09:40,414 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2248 transitions. Word has length 109 [2020-10-13 14:09:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:40,414 INFO L479 AbstractCegarLoop]: Abstraction has 1862 states and 2248 transitions. [2020-10-13 14:09:40,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:09:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2248 transitions. [2020-10-13 14:09:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:09:40,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:40,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-13 14:09:40,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 14:09:40,416 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:40,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:40,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1154459706, now seen corresponding path program 1 times [2020-10-13 14:09:40,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:40,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579722191] [2020-10-13 14:09:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:40,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:40,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:42,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:43,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:44,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:45,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:45,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:09:45,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:09:45,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:09:45,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:45,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:09:45,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 14:09:45,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:09:45,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:45,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:45,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:45,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:45,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:45,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:45,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:45,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:45,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:45,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:45,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 14:09:45,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579722191] [2020-10-13 14:09:45,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:45,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:09:45,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677125870] [2020-10-13 14:09:45,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:09:45,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:45,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:09:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:09:45,572 INFO L87 Difference]: Start difference. First operand 1862 states and 2248 transitions. Second operand 5 states. [2020-10-13 14:09:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:46,348 INFO L93 Difference]: Finished difference Result 3306 states and 4047 transitions. [2020-10-13 14:09:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:09:46,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-13 14:09:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:46,351 INFO L225 Difference]: With dead ends: 3306 [2020-10-13 14:09:46,351 INFO L226 Difference]: Without dead ends: 1602 [2020-10-13 14:09:46,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:09:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2020-10-13 14:09:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1272. [2020-10-13 14:09:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-13 14:09:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1504 transitions. [2020-10-13 14:09:46,684 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1504 transitions. Word has length 109 [2020-10-13 14:09:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:46,685 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 1504 transitions. [2020-10-13 14:09:46,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:09:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1504 transitions. [2020-10-13 14:09:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:09:46,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:46,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2020-10-13 14:09:46,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 14:09:46,686 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1507155125, now seen corresponding path program 1 times [2020-10-13 14:09:46,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:46,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400260317] [2020-10-13 14:09:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:46,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:47,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:47,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:48,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:48,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:48,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:49,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:51,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:51,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:51,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:51,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:51,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:09:51,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:09:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:09:51,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:09:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 14:09:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:09:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:52,109 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2020-10-13 14:09:52,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:52,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:52,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:52,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400260317] [2020-10-13 14:09:52,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:09:52,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:09:52,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272252913] [2020-10-13 14:09:52,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:09:52,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:52,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:09:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:09:52,283 INFO L87 Difference]: Start difference. First operand 1272 states and 1504 transitions. Second operand 12 states. [2020-10-13 14:09:52,531 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:09:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:54,519 INFO L93 Difference]: Finished difference Result 2082 states and 2461 transitions. [2020-10-13 14:09:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:09:54,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2020-10-13 14:09:54,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:54,521 INFO L225 Difference]: With dead ends: 2082 [2020-10-13 14:09:54,521 INFO L226 Difference]: Without dead ends: 1540 [2020-10-13 14:09:54,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-10-13 14:09:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2020-10-13 14:09:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1272. [2020-10-13 14:09:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-13 14:09:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1496 transitions. [2020-10-13 14:09:54,875 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1496 transitions. Word has length 109 [2020-10-13 14:09:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:54,875 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 1496 transitions. [2020-10-13 14:09:54,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:09:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1496 transitions. [2020-10-13 14:09:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:09:54,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:54,876 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2020-10-13 14:09:54,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 14:09:54,876 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1134629231, now seen corresponding path program 1 times [2020-10-13 14:09:54,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:54,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992161165] [2020-10-13 14:09:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:54,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:54,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:55,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:56,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:56,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:56,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:59,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:59,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:59,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:59,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:59,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:09:59,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:09:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:09:59,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:09:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:09:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 14:09:59,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:00,317 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-10-13 14:10:00,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:00,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:00,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:00,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:00,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:00,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:10:00,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:00,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:00,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:00,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:00,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:00,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992161165] [2020-10-13 14:10:00,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:10:00,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:10:00,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837563092] [2020-10-13 14:10:00,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:10:00,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:10:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:10:00,525 INFO L87 Difference]: Start difference. First operand 1272 states and 1496 transitions. Second operand 12 states. [2020-10-13 14:10:00,786 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:10:01,832 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:10:02,059 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-13 14:10:02,294 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:10:02,536 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:10:02,846 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:10:03,100 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-13 14:10:03,432 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 14:10:03,716 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-13 14:10:04,589 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-13 14:10:04,893 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 14:10:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:05,331 INFO L93 Difference]: Finished difference Result 2410 states and 2857 transitions. [2020-10-13 14:10:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 14:10:05,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2020-10-13 14:10:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:05,334 INFO L225 Difference]: With dead ends: 2410 [2020-10-13 14:10:05,334 INFO L226 Difference]: Without dead ends: 1892 [2020-10-13 14:10:05,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 14:10:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2020-10-13 14:10:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1272. [2020-10-13 14:10:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-13 14:10:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1488 transitions. [2020-10-13 14:10:05,716 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1488 transitions. Word has length 109 [2020-10-13 14:10:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:05,717 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 1488 transitions. [2020-10-13 14:10:05,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:10:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1488 transitions. [2020-10-13 14:10:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 14:10:05,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:05,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-13 14:10:05,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 14:10:05,718 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:05,718 INFO L82 PathProgramCache]: Analyzing trace with hash -874065608, now seen corresponding path program 1 times [2020-10-13 14:10:05,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:05,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621012425] [2020-10-13 14:10:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:05,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:05,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:06,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:06,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:07,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:07,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:08,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:08,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:09,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:09,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:10,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:10,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 14:10:10,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:10:10,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:10:10,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:10,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:10:10,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:10:10,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:10:10,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:11,085 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2020-10-13 14:10:11,275 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 14:10:11,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:11,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:11,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:11,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:11,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:11,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:10:11,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:11,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:10:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:11,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621012425] [2020-10-13 14:10:11,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:10:11,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:10:11,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56009708] [2020-10-13 14:10:11,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:10:11,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:10:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:10:11,328 INFO L87 Difference]: Start difference. First operand 1272 states and 1488 transitions. Second operand 12 states. [2020-10-13 14:10:11,676 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-13 14:10:13,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:13,519 INFO L93 Difference]: Finished difference Result 2466 states and 2919 transitions. [2020-10-13 14:10:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 14:10:13,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-10-13 14:10:13,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:13,521 INFO L225 Difference]: With dead ends: 2466 [2020-10-13 14:10:13,522 INFO L226 Difference]: Without dead ends: 1384 [2020-10-13 14:10:13,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2020-10-13 14:10:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2020-10-13 14:10:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1272. [2020-10-13 14:10:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-13 14:10:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1472 transitions. [2020-10-13 14:10:13,940 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1472 transitions. Word has length 110 [2020-10-13 14:10:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:13,940 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 1472 transitions. [2020-10-13 14:10:13,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:10:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1472 transitions. [2020-10-13 14:10:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:10:13,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:13,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 14:10:13,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 14:10:13,941 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1482638004, now seen corresponding path program 1 times [2020-10-13 14:10:13,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:13,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182462414] [2020-10-13 14:10:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:13,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:18,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:18,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 14:10:18,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:19,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:19,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:19,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:19,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:19,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:10:19,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:19,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:19,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:19,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:19,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:19,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182462414] [2020-10-13 14:10:19,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:10:19,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 14:10:19,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346300615] [2020-10-13 14:10:19,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 14:10:19,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:19,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 14:10:19,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-13 14:10:19,862 INFO L87 Difference]: Start difference. First operand 1272 states and 1472 transitions. Second operand 18 states.