/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:08:27,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:08:27,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:08:27,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:08:27,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:08:27,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:08:27,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:08:27,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:08:27,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:08:27,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:08:27,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:08:27,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:08:27,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:08:27,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:08:27,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:08:27,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:08:27,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:08:27,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:08:27,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:08:27,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:08:27,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:08:27,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:08:27,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:08:27,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:08:27,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:08:27,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:08:27,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:08:27,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:08:27,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:08:27,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:08:27,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:08:27,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:08:27,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:08:27,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:08:27,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:08:27,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:08:27,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:08:27,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:08:27,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:08:27,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:08:27,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:08:27,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:08:27,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:08:27,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:08:27,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:08:27,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:08:27,670 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:08:27,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:08:27,671 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:08:27,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:08:27,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:08:27,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:08:27,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:08:27,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:08:27,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:08:27,672 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:08:27,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:08:27,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:08:27,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:08:27,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:08:27,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:08:27,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:08:27,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:08:27,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:08:27,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:08:27,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:08:27,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:08:27,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:08:27,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:08:27,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:08:27,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:08:27,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:08:27,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:08:27,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:08:27,955 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:08:27,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:08:27,957 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:08:27,958 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 20:08:28,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7efd1370a/7e22870d062c4c83967f4b47368ea04f/FLAGe57ff3536 [2020-10-12 20:08:28,497 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:08:28,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 20:08:28,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7efd1370a/7e22870d062c4c83967f4b47368ea04f/FLAGe57ff3536 [2020-10-12 20:08:28,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7efd1370a/7e22870d062c4c83967f4b47368ea04f [2020-10-12 20:08:28,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:08:28,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:08:28,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:08:28,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:08:28,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:08:28,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:08:28" (1/1) ... [2020-10-12 20:08:28,858 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 12.10 08:08:28, skipping insertion in model container [2020-10-12 20:08:28,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:08:28" (1/1) ... [2020-10-12 20:08:28,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:08:28,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:08:29,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:08:29,323 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:08:29,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:08:29,456 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:08:29,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29 WrapperNode [2020-10-12 20:08:29,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:08:29,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:08:29,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:08:29,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:08:29,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... [2020-10-12 20:08:29,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... [2020-10-12 20:08:29,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... [2020-10-12 20:08:29,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... [2020-10-12 20:08:29,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... [2020-10-12 20:08:29,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... [2020-10-12 20:08:29,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... [2020-10-12 20:08:29,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:08:29,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:08:29,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:08:29,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:08:29,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:08:29,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:08:29,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:08:29,629 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:08:29,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:08:29,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:08:29,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:08:29,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:08:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:08:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:08:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:08:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:08:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:08:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:08:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:08:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:08:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:08:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:08:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 20:08:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:08:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:08:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:08:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:08:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:08:30,663 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:08:30,663 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:08:30,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:08:30 BoogieIcfgContainer [2020-10-12 20:08:30,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:08:30,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:08:30,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:08:30,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:08:30,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:08:28" (1/3) ... [2020-10-12 20:08:30,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6161c67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:08:30, skipping insertion in model container [2020-10-12 20:08:30,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:29" (2/3) ... [2020-10-12 20:08:30,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6161c67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:08:30, skipping insertion in model container [2020-10-12 20:08:30,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:08:30" (3/3) ... [2020-10-12 20:08:30,678 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 20:08:30,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:08:30,696 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:08:30,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:08:30,733 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:08:30,733 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:08:30,733 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:08:30,733 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:08:30,734 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:08:30,734 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:08:30,734 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:08:30,734 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:08:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states. [2020-10-12 20:08:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 20:08:30,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:30,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:30,768 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash 813203295, now seen corresponding path program 1 times [2020-10-12 20:08:30,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:30,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218931074] [2020-10-12 20:08:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:31,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:34,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 20:08:34,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:08:34,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3261 [2020-10-12 20:08:34,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:08:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 20:08:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 20:08:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:08:34,724 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:08:34,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:34,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:34,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:34,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:34,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:08:34,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:34,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:34,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:34,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218931074] [2020-10-12 20:08:34,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:34,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:08:34,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327897302] [2020-10-12 20:08:34,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:08:34,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:34,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:08:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:34,830 INFO L87 Difference]: Start difference. First operand 211 states. Second operand 8 states. [2020-10-12 20:08:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:37,301 INFO L93 Difference]: Finished difference Result 828 states and 1358 transitions. [2020-10-12 20:08:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:08:37,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-12 20:08:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:37,327 INFO L225 Difference]: With dead ends: 828 [2020-10-12 20:08:37,327 INFO L226 Difference]: Without dead ends: 673 [2020-10-12 20:08:37,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-10-12 20:08:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 665. [2020-10-12 20:08:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-10-12 20:08:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1008 transitions. [2020-10-12 20:08:37,459 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1008 transitions. Word has length 83 [2020-10-12 20:08:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:37,460 INFO L479 AbstractCegarLoop]: Abstraction has 665 states and 1008 transitions. [2020-10-12 20:08:37,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:08:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1008 transitions. [2020-10-12 20:08:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 20:08:37,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:37,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:37,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:08:37,475 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1504076975, now seen corresponding path program 1 times [2020-10-12 20:08:37,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:37,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350942951] [2020-10-12 20:08:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:37,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:37,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:39,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:39,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 20:08:39,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:08:39,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-12 20:08:39,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:08:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:08:39,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 20:08:39,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:39,349 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:08:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:39,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:39,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:39,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:39,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:39,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:08:39,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:39,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350942951] [2020-10-12 20:08:39,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:39,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:08:39,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671928861] [2020-10-12 20:08:39,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:08:39,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:39,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:08:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:39,410 INFO L87 Difference]: Start difference. First operand 665 states and 1008 transitions. Second operand 8 states. [2020-10-12 20:08:39,669 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-12 20:08:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:40,719 INFO L93 Difference]: Finished difference Result 2397 states and 3772 transitions. [2020-10-12 20:08:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:08:40,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-12 20:08:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:40,739 INFO L225 Difference]: With dead ends: 2397 [2020-10-12 20:08:40,739 INFO L226 Difference]: Without dead ends: 2015 [2020-10-12 20:08:40,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-12 20:08:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2020-10-12 20:08:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1128. [2020-10-12 20:08:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2020-10-12 20:08:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1740 transitions. [2020-10-12 20:08:40,927 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1740 transitions. Word has length 84 [2020-10-12 20:08:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:40,930 INFO L479 AbstractCegarLoop]: Abstraction has 1128 states and 1740 transitions. [2020-10-12 20:08:40,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:08:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1740 transitions. [2020-10-12 20:08:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 20:08:40,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:40,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:40,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:08:40,934 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:40,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash 356835384, now seen corresponding path program 1 times [2020-10-12 20:08:40,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:40,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844814261] [2020-10-12 20:08:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:41,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:41,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:41,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 20:08:41,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:41,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-12 20:08:41,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:41,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:08:41,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:08:41,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 20:08:41,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:42,082 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:08:42,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:42,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:42,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:42,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:42,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:42,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 20:08:42,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:42,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:42,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:42,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:08:42,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:42,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844814261] [2020-10-12 20:08:42,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:42,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:08:42,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635701574] [2020-10-12 20:08:42,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:08:42,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:08:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:08:42,144 INFO L87 Difference]: Start difference. First operand 1128 states and 1740 transitions. Second operand 6 states. [2020-10-12 20:08:42,337 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 20:08:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:43,467 INFO L93 Difference]: Finished difference Result 2981 states and 4651 transitions. [2020-10-12 20:08:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:08:43,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-12 20:08:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:43,478 INFO L225 Difference]: With dead ends: 2981 [2020-10-12 20:08:43,478 INFO L226 Difference]: Without dead ends: 1934 [2020-10-12 20:08:43,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-10-12 20:08:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1932. [2020-10-12 20:08:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1932 states. [2020-10-12 20:08:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2992 transitions. [2020-10-12 20:08:43,660 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2992 transitions. Word has length 85 [2020-10-12 20:08:43,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:43,662 INFO L479 AbstractCegarLoop]: Abstraction has 1932 states and 2992 transitions. [2020-10-12 20:08:43,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:08:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2992 transitions. [2020-10-12 20:08:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 20:08:43,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:43,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:43,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:08:43,667 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1887979913, now seen corresponding path program 1 times [2020-10-12 20:08:43,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:43,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027487692] [2020-10-12 20:08:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:43,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:43,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:44,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:44,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 20:08:44,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-12 20:08:44,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:44,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:08:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:08:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 20:08:44,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 20:08:44,701 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:08:44,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:44,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:44,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:44,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:44,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 20:08:44,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:08:44,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 20:08:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:44,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027487692] [2020-10-12 20:08:44,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:44,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:08:44,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115778197] [2020-10-12 20:08:44,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:08:44,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:08:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:08:44,790 INFO L87 Difference]: Start difference. First operand 1932 states and 2992 transitions. Second operand 6 states. [2020-10-12 20:08:44,994 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 20:08:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:46,121 INFO L93 Difference]: Finished difference Result 5257 states and 8200 transitions. [2020-10-12 20:08:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:08:46,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-12 20:08:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:46,142 INFO L225 Difference]: With dead ends: 5257 [2020-10-12 20:08:46,143 INFO L226 Difference]: Without dead ends: 3436 [2020-10-12 20:08:46,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2020-10-12 20:08:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3434. [2020-10-12 20:08:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3434 states. [2020-10-12 20:08:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 5317 transitions. [2020-10-12 20:08:46,496 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 5317 transitions. Word has length 85 [2020-10-12 20:08:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:46,497 INFO L479 AbstractCegarLoop]: Abstraction has 3434 states and 5317 transitions. [2020-10-12 20:08:46,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:08:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 5317 transitions. [2020-10-12 20:08:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 20:08:46,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:46,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:46,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:08:46,502 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1868628262, now seen corresponding path program 1 times [2020-10-12 20:08:46,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:46,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857959721] [2020-10-12 20:08:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:47,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:47,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 20:08:47,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:47,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-12 20:08:47,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:47,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:08:47,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:08:47,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 20:08:47,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:47,306 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:08:47,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:47,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:47,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:47,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:47,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 20:08:47,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:47,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:08:47,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:47,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857959721] [2020-10-12 20:08:47,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:47,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:08:47,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64713724] [2020-10-12 20:08:47,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:08:47,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:08:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:08:47,384 INFO L87 Difference]: Start difference. First operand 3434 states and 5317 transitions. Second operand 6 states. [2020-10-12 20:08:47,636 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 20:08:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:48,941 INFO L93 Difference]: Finished difference Result 9673 states and 15066 transitions. [2020-10-12 20:08:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:08:48,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-12 20:08:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:48,974 INFO L225 Difference]: With dead ends: 9673 [2020-10-12 20:08:48,974 INFO L226 Difference]: Without dead ends: 6384 [2020-10-12 20:08:48,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2020-10-12 20:08:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 6382. [2020-10-12 20:08:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6382 states. [2020-10-12 20:08:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 9884 transitions. [2020-10-12 20:08:49,503 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 9884 transitions. Word has length 85 [2020-10-12 20:08:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:49,504 INFO L479 AbstractCegarLoop]: Abstraction has 6382 states and 9884 transitions. [2020-10-12 20:08:49,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:08:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 9884 transitions. [2020-10-12 20:08:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 20:08:49,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:49,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:49,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:08:49,509 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1875182311, now seen corresponding path program 1 times [2020-10-12 20:08:49,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:49,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644263898] [2020-10-12 20:08:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:49,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:49,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:49,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 20:08:49,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:49,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-12 20:08:49,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:08:49,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:08:49,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 20:08:49,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:08:50,204 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:08:50,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:50,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:50,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:50,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:50,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:50,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 20:08:50,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:50,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:08:50,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:50,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644263898] [2020-10-12 20:08:50,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:50,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:08:50,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513555844] [2020-10-12 20:08:50,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:08:50,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:08:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:08:50,282 INFO L87 Difference]: Start difference. First operand 6382 states and 9884 transitions. Second operand 6 states. [2020-10-12 20:08:50,531 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 20:08:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:52,323 INFO L93 Difference]: Finished difference Result 18704 states and 28986 transitions. [2020-10-12 20:08:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:08:52,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-12 20:08:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:52,396 INFO L225 Difference]: With dead ends: 18704 [2020-10-12 20:08:52,397 INFO L226 Difference]: Without dead ends: 12380 [2020-10-12 20:08:52,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12380 states. [2020-10-12 20:08:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12380 to 12378. [2020-10-12 20:08:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12378 states. [2020-10-12 20:08:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12378 states to 12378 states and 19037 transitions. [2020-10-12 20:08:53,426 INFO L78 Accepts]: Start accepts. Automaton has 12378 states and 19037 transitions. Word has length 85 [2020-10-12 20:08:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:53,427 INFO L479 AbstractCegarLoop]: Abstraction has 12378 states and 19037 transitions. [2020-10-12 20:08:53,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:08:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 12378 states and 19037 transitions. [2020-10-12 20:08:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 20:08:53,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:53,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:53,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:08:53,434 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:53,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1997503320, now seen corresponding path program 1 times [2020-10-12 20:08:53,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:53,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729175528] [2020-10-12 20:08:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:53,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:53,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:53,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 20:08:53,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:53,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-12 20:08:53,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:08:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:08:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:08:53,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:54,186 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:08:54,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:54,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:54,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:54,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:54,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:54,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:08:54,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:08:54,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:54,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729175528] [2020-10-12 20:08:54,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:54,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:08:54,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517162983] [2020-10-12 20:08:54,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:08:54,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:54,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:08:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:08:54,236 INFO L87 Difference]: Start difference. First operand 12378 states and 19037 transitions. Second operand 6 states. [2020-10-12 20:08:54,417 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 20:08:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:56,839 INFO L93 Difference]: Finished difference Result 36593 states and 56296 transitions. [2020-10-12 20:08:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:08:56,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-12 20:08:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:56,896 INFO L225 Difference]: With dead ends: 36593 [2020-10-12 20:08:56,896 INFO L226 Difference]: Without dead ends: 24282 [2020-10-12 20:08:56,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24282 states. [2020-10-12 20:08:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24282 to 24280. [2020-10-12 20:08:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24280 states. [2020-10-12 20:08:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24280 states to 24280 states and 37172 transitions. [2020-10-12 20:08:59,216 INFO L78 Accepts]: Start accepts. Automaton has 24280 states and 37172 transitions. Word has length 86 [2020-10-12 20:08:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:59,217 INFO L479 AbstractCegarLoop]: Abstraction has 24280 states and 37172 transitions. [2020-10-12 20:08:59,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:08:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 24280 states and 37172 transitions. [2020-10-12 20:08:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 20:08:59,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:59,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:59,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:08:59,227 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1201074475, now seen corresponding path program 1 times [2020-10-12 20:08:59,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:59,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369010480] [2020-10-12 20:08:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:59,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:59,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:00,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:00,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 20:09:00,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:09:00,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-12 20:09:00,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:09:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:09:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 20:09:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:00,991 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:09:00,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:09:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:01,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:01,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:09:01,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:09:01,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 20:09:01,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:09:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:09:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:09:01,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:09:01,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369010480] [2020-10-12 20:09:01,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:09:01,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:09:01,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292370294] [2020-10-12 20:09:01,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:09:01,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:09:01,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:09:01,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:09:01,052 INFO L87 Difference]: Start difference. First operand 24280 states and 37172 transitions. Second operand 11 states. [2020-10-12 20:09:01,268 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-12 20:09:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:09:08,618 INFO L93 Difference]: Finished difference Result 110239 states and 168185 transitions. [2020-10-12 20:09:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 20:09:08,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-10-12 20:09:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:09:08,821 INFO L225 Difference]: With dead ends: 110239 [2020-10-12 20:09:08,822 INFO L226 Difference]: Without dead ends: 95312 [2020-10-12 20:09:08,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2020-10-12 20:09:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95312 states. [2020-10-12 20:09:11,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95312 to 24594. [2020-10-12 20:09:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24594 states. [2020-10-12 20:09:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24594 states to 24594 states and 37596 transitions. [2020-10-12 20:09:11,249 INFO L78 Accepts]: Start accepts. Automaton has 24594 states and 37596 transitions. Word has length 86 [2020-10-12 20:09:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:09:11,249 INFO L479 AbstractCegarLoop]: Abstraction has 24594 states and 37596 transitions. [2020-10-12 20:09:11,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:09:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 24594 states and 37596 transitions. [2020-10-12 20:09:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 20:09:11,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:09:11,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:09:11,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:09:11,260 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:09:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:09:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash 248940149, now seen corresponding path program 1 times [2020-10-12 20:09:11,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:09:11,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894439942] [2020-10-12 20:09:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:09:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:11,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:11,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:12,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:12,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 20:09:12,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:09:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1267 [2020-10-12 20:09:12,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:09:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:09:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 20:09:12,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:12,899 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:09:12,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:09:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:12,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:12,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:12,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:09:12,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:09:12,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 20:09:12,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:09:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:09:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:09:12,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:09:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:09:12,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894439942] [2020-10-12 20:09:12,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:09:12,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:09:12,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368457975] [2020-10-12 20:09:12,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:09:12,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:09:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:09:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:09:12,995 INFO L87 Difference]: Start difference. First operand 24594 states and 37596 transitions. Second operand 11 states. [2020-10-12 20:09:13,923 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 20:09:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:09:26,510 INFO L93 Difference]: Finished difference Result 145119 states and 221585 transitions. [2020-10-12 20:09:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 20:09:26,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-10-12 20:09:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:09:26,832 INFO L225 Difference]: With dead ends: 145119 [2020-10-12 20:09:26,832 INFO L226 Difference]: Without dead ends: 134845 [2020-10-12 20:09:26,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 20:09:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134845 states. [2020-10-12 20:09:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134845 to 25190. [2020-10-12 20:09:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25190 states. [2020-10-12 20:09:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25190 states to 25190 states and 38442 transitions. [2020-10-12 20:09:30,756 INFO L78 Accepts]: Start accepts. Automaton has 25190 states and 38442 transitions. Word has length 86 [2020-10-12 20:09:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:09:30,757 INFO L479 AbstractCegarLoop]: Abstraction has 25190 states and 38442 transitions. [2020-10-12 20:09:30,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:09:30,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25190 states and 38442 transitions. [2020-10-12 20:09:30,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 20:09:30,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:09:30,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:09:30,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:09:30,767 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:09:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:09:30,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1695531499, now seen corresponding path program 1 times [2020-10-12 20:09:30,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:09:30,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10943270] [2020-10-12 20:09:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:09:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:30,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:30,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:33,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:33,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 20:09:33,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:09:33,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2237 [2020-10-12 20:09:33,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:33,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:09:33,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:09:33,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 20:09:33,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:33,355 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:09:33,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:09:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:33,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:33,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:33,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:09:33,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:09:33,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 20:09:33,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:33,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:09:33,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:09:33,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:09:33,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:09:33,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10943270] [2020-10-12 20:09:33,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:09:33,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:09:33,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520488878] [2020-10-12 20:09:33,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:09:33,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:09:33,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:09:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:09:33,436 INFO L87 Difference]: Start difference. First operand 25190 states and 38442 transitions. Second operand 11 states. [2020-10-12 20:09:33,663 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 20:09:48,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:09:48,257 INFO L93 Difference]: Finished difference Result 138085 states and 211204 transitions. [2020-10-12 20:09:48,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 20:09:48,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-10-12 20:09:48,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:09:48,409 INFO L225 Difference]: With dead ends: 138085 [2020-10-12 20:09:48,409 INFO L226 Difference]: Without dead ends: 132474 [2020-10-12 20:09:48,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 20:09:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132474 states. [2020-10-12 20:09:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132474 to 25190. [2020-10-12 20:09:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25190 states. [2020-10-12 20:09:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25190 states to 25190 states and 38438 transitions. [2020-10-12 20:09:51,088 INFO L78 Accepts]: Start accepts. Automaton has 25190 states and 38438 transitions. Word has length 86 [2020-10-12 20:09:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:09:51,088 INFO L479 AbstractCegarLoop]: Abstraction has 25190 states and 38438 transitions. [2020-10-12 20:09:51,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:09:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 25190 states and 38438 transitions. [2020-10-12 20:09:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 20:09:51,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:09:51,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:09:51,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:09:51,097 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:09:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:09:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash -699410635, now seen corresponding path program 1 times [2020-10-12 20:09:51,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:09:51,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101267830] [2020-10-12 20:09:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:09:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:51,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:51,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:51,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:52,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:52,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 20:09:52,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:09:52,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1555 [2020-10-12 20:09:52,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:52,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:09:52,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:09:52,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 20:09:52,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:53,052 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:09:53,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:09:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:53,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:53,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:53,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:09:53,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:09:53,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 20:09:53,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:09:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:09:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:09:53,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:09:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:09:53,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101267830] [2020-10-12 20:09:53,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:09:53,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:09:53,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498882228] [2020-10-12 20:09:53,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:09:53,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:09:53,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:09:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:09:53,139 INFO L87 Difference]: Start difference. First operand 25190 states and 38438 transitions. Second operand 11 states. [2020-10-12 20:09:53,413 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-12 20:10:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:10:05,994 INFO L93 Difference]: Finished difference Result 123920 states and 188684 transitions. [2020-10-12 20:10:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 20:10:05,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-10-12 20:10:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:10:06,110 INFO L225 Difference]: With dead ends: 123920 [2020-10-12 20:10:06,110 INFO L226 Difference]: Without dead ends: 104340 [2020-10-12 20:10:06,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2020-10-12 20:10:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104340 states. [2020-10-12 20:10:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104340 to 25616. [2020-10-12 20:10:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25616 states. [2020-10-12 20:10:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25616 states to 25616 states and 38986 transitions. [2020-10-12 20:10:09,150 INFO L78 Accepts]: Start accepts. Automaton has 25616 states and 38986 transitions. Word has length 86 [2020-10-12 20:10:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:10:09,150 INFO L479 AbstractCegarLoop]: Abstraction has 25616 states and 38986 transitions. [2020-10-12 20:10:09,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:10:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 25616 states and 38986 transitions. [2020-10-12 20:10:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 20:10:09,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:10:09,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:10:09,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:10:09,158 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:10:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:10:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1494372669, now seen corresponding path program 1 times [2020-10-12 20:10:09,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:10:09,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330420571] [2020-10-12 20:10:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:10:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:09,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:09,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:10,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:10,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 20:10:10,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:10:10,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1223 [2020-10-12 20:10:10,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:10:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:10:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 20:10:10,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:10,690 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:10:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:10:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:10,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:10,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:10,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:10:10,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:10:10,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:10:10,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:10,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:10:10,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:10:10,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:10:10,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:10:10,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330420571] [2020-10-12 20:10:10,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:10:10,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:10:10,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989253534] [2020-10-12 20:10:10,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:10:10,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:10:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:10:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:10:10,750 INFO L87 Difference]: Start difference. First operand 25616 states and 38986 transitions. Second operand 11 states. [2020-10-12 20:10:10,953 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-12 20:10:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:10:31,956 INFO L93 Difference]: Finished difference Result 183537 states and 280589 transitions. [2020-10-12 20:10:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 20:10:31,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-12 20:10:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:10:32,144 INFO L225 Difference]: With dead ends: 183537 [2020-10-12 20:10:32,144 INFO L226 Difference]: Without dead ends: 159497 [2020-10-12 20:10:32,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 20:10:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159497 states. [2020-10-12 20:10:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159497 to 25975. [2020-10-12 20:10:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25975 states. [2020-10-12 20:10:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25975 states to 25975 states and 39397 transitions. [2020-10-12 20:10:36,133 INFO L78 Accepts]: Start accepts. Automaton has 25975 states and 39397 transitions. Word has length 87 [2020-10-12 20:10:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:10:36,133 INFO L479 AbstractCegarLoop]: Abstraction has 25975 states and 39397 transitions. [2020-10-12 20:10:36,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:10:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 25975 states and 39397 transitions. [2020-10-12 20:10:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 20:10:36,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:10:36,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:10:36,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:10:36,141 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:10:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:10:36,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1470543527, now seen corresponding path program 1 times [2020-10-12 20:10:36,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:10:36,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986103645] [2020-10-12 20:10:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:10:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:36,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:36,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:36,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 20:10:36,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:10:36,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-12 20:10:36,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:36,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:10:36,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-12 20:10:36,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:10:36,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:36,445 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:10:36,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:10:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:36,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:36,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:36,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:10:36,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:10:36,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:10:36,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:36,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:10:36,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:10:36,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:10:36,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:10:36,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986103645] [2020-10-12 20:10:36,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:10:36,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:10:36,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235296099] [2020-10-12 20:10:36,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:10:36,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:10:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:10:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:10:36,470 INFO L87 Difference]: Start difference. First operand 25975 states and 39397 transitions. Second operand 5 states. [2020-10-12 20:10:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:10:43,652 INFO L93 Difference]: Finished difference Result 49945 states and 75846 transitions. [2020-10-12 20:10:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:10:43,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-12 20:10:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:10:43,703 INFO L225 Difference]: With dead ends: 49945 [2020-10-12 20:10:43,703 INFO L226 Difference]: Without dead ends: 49943 [2020-10-12 20:10:43,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:10:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49943 states. [2020-10-12 20:10:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49943 to 26615. [2020-10-12 20:10:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26615 states. [2020-10-12 20:10:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26615 states to 26615 states and 40037 transitions. [2020-10-12 20:10:47,077 INFO L78 Accepts]: Start accepts. Automaton has 26615 states and 40037 transitions. Word has length 87 [2020-10-12 20:10:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:10:47,077 INFO L479 AbstractCegarLoop]: Abstraction has 26615 states and 40037 transitions. [2020-10-12 20:10:47,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:10:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 26615 states and 40037 transitions. [2020-10-12 20:10:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 20:10:47,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:10:47,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:10:47,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:10:47,086 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:10:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:10:47,086 INFO L82 PathProgramCache]: Analyzing trace with hash -201561934, now seen corresponding path program 1 times [2020-10-12 20:10:47,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:10:47,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734220369] [2020-10-12 20:10:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:10:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:47,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:47,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:48,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:48,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 20:10:48,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:10:48,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-10-12 20:10:48,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:48,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:10:48,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:10:48,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 20:10:48,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:49,151 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:10:49,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:10:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:49,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:49,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:10:49,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:10:49,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:10:49,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:49,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:10:49,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:10:49,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:10:49,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:10:49,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734220369] [2020-10-12 20:10:49,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:10:49,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:10:49,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159326139] [2020-10-12 20:10:49,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:10:49,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:10:49,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:10:49,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:10:49,190 INFO L87 Difference]: Start difference. First operand 26615 states and 40037 transitions. Second operand 10 states. [2020-10-12 20:10:49,377 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-12 20:11:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:11:05,058 INFO L93 Difference]: Finished difference Result 124538 states and 188829 transitions. [2020-10-12 20:11:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 20:11:05,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-10-12 20:11:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:11:05,169 INFO L225 Difference]: With dead ends: 124538 [2020-10-12 20:11:05,170 INFO L226 Difference]: Without dead ends: 98968 [2020-10-12 20:11:05,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-12 20:11:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98968 states. [2020-10-12 20:11:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98968 to 38370. [2020-10-12 20:11:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38370 states. [2020-10-12 20:11:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38370 states to 38370 states and 57895 transitions. [2020-10-12 20:11:12,239 INFO L78 Accepts]: Start accepts. Automaton has 38370 states and 57895 transitions. Word has length 88 [2020-10-12 20:11:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:11:12,240 INFO L479 AbstractCegarLoop]: Abstraction has 38370 states and 57895 transitions. [2020-10-12 20:11:12,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:11:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 38370 states and 57895 transitions. [2020-10-12 20:11:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 20:11:12,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:11:12,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:11:12,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:11:12,249 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:11:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:11:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1397449992, now seen corresponding path program 1 times [2020-10-12 20:11:12,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:11:12,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398450251] [2020-10-12 20:11:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:11:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:11:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:11:12,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:11:12,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 20:11:12,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:11:12,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 20:11:12,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:11:12,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:11:12,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:11:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 20:11:12,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:11:12,586 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:11:12,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:11:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:11:12,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:11:12,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:11:12,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:11:12,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:11:12,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:11:12,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:11:12,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:11:12,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:11:12,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:11:12,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:11:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:11:12,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398450251] [2020-10-12 20:11:12,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:11:12,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:11:12,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630713294] [2020-10-12 20:11:12,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:11:12,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:11:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:11:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:11:12,614 INFO L87 Difference]: Start difference. First operand 38370 states and 57895 transitions. Second operand 5 states. [2020-10-12 20:11:12,807 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 20:11:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:11:24,056 INFO L93 Difference]: Finished difference Result 104682 states and 158005 transitions. [2020-10-12 20:11:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:11:24,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-12 20:11:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:11:24,133 INFO L225 Difference]: With dead ends: 104682 [2020-10-12 20:11:24,134 INFO L226 Difference]: Without dead ends: 69128 [2020-10-12 20:11:24,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:11:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69128 states. [2020-10-12 20:11:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69128 to 68670. [2020-10-12 20:11:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68670 states. [2020-10-12 20:11:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68670 states to 68670 states and 102619 transitions. [2020-10-12 20:11:35,861 INFO L78 Accepts]: Start accepts. Automaton has 68670 states and 102619 transitions. Word has length 88 [2020-10-12 20:11:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:11:35,861 INFO L479 AbstractCegarLoop]: Abstraction has 68670 states and 102619 transitions. [2020-10-12 20:11:35,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:11:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 68670 states and 102619 transitions. [2020-10-12 20:11:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 20:11:35,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:11:35,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:11:35,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:11:35,870 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:11:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:11:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash 748725357, now seen corresponding path program 1 times [2020-10-12 20:11:35,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:11:35,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808855690] [2020-10-12 20:11:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:11:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:11:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:11:35,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:11:36,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:11:37,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:11:37,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 20:11:37,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:11:37,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1537 [2020-10-12 20:11:37,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:11:37,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:11:37,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:11:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 20:11:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:11:37,786 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-12 20:11:37,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:11:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:11:37,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:11:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:11:37,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:11:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:11:37,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808855690] [2020-10-12 20:11:37,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:11:37,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:11:37,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243965682] [2020-10-12 20:11:37,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:11:37,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:11:37,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:11:37,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:11:37,819 INFO L87 Difference]: Start difference. First operand 68670 states and 102619 transitions. Second operand 10 states. [2020-10-12 20:11:38,024 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 151