/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:50:45,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:50:45,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:50:45,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:50:45,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:50:45,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:50:45,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:50:45,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:50:45,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:50:45,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:50:45,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:50:45,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:50:45,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:50:45,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:50:45,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:50:45,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:50:45,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:50:45,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:50:45,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:50:45,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:50:45,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:50:45,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:50:45,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:50:45,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:50:45,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:50:45,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:50:45,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:50:45,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:50:45,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:50:45,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:50:45,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:50:45,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:50:45,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:50:45,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:50:45,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:50:45,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:50:45,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:50:45,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:50:45,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:50:45,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:50:45,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:50:45,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:50:45,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:50:45,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:50:45,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:50:45,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:50:45,763 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:50:45,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:50:45,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:50:45,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:50:45,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:50:45,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:50:45,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:50:45,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:50:45,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:50:45,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:50:45,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:50:45,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:50:45,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:50:45,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:50:45,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:50:45,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:50:45,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:50:45,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:50:45,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:50:45,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:50:45,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:50:45,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:50:45,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:50:45,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:50:45,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:50:45,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:50:46,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:50:46,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:50:46,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:50:46,082 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:50:46,082 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:50:46,083 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:50:46,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e4caf141/10f38dd5bec142f8b1fc437bd1480bf1/FLAG2c610d702 [2020-10-13 14:50:46,688 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:50:46,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:50:46,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e4caf141/10f38dd5bec142f8b1fc437bd1480bf1/FLAG2c610d702 [2020-10-13 14:50:46,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e4caf141/10f38dd5bec142f8b1fc437bd1480bf1 [2020-10-13 14:50:46,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:50:46,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:50:47,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:50:47,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:50:47,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:50:47,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:50:46" (1/1) ... [2020-10-13 14:50:47,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf2a9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47, skipping insertion in model container [2020-10-13 14:50:47,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:50:46" (1/1) ... [2020-10-13 14:50:47,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:50:47,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:50:47,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:50:47,552 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:50:47,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:50:47,682 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:50:47,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47 WrapperNode [2020-10-13 14:50:47,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:50:47,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:50:47,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:50:47,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:50:47,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... [2020-10-13 14:50:47,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... [2020-10-13 14:50:47,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... [2020-10-13 14:50:47,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... [2020-10-13 14:50:47,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... [2020-10-13 14:50:47,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... [2020-10-13 14:50:47,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... [2020-10-13 14:50:47,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:50:47,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:50:47,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:50:47,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:50:47,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:50:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:50:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:50:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:50:47,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:50:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:50:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:50:47,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:50:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:50:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:50:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:50:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:50:47,850 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:50:47,850 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:50:47,850 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:50:47,850 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:50:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:50:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:50:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:50:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:50:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:50:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:50:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:50:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:50:48,825 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:50:48,825 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:50:48,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:50:48 BoogieIcfgContainer [2020-10-13 14:50:48,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:50:48,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:50:48,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:50:48,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:50:48,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:50:46" (1/3) ... [2020-10-13 14:50:48,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1bedb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:50:48, skipping insertion in model container [2020-10-13 14:50:48,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:50:47" (2/3) ... [2020-10-13 14:50:48,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1bedb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:50:48, skipping insertion in model container [2020-10-13 14:50:48,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:50:48" (3/3) ... [2020-10-13 14:50:48,840 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:50:48,851 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:50:48,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:50:48,874 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:50:48,901 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:50:48,901 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:50:48,901 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:50:48,902 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:50:48,902 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:50:48,902 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:50:48,902 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:50:48,903 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:50:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states. [2020-10-13 14:50:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:50:48,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:48,940 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] [2020-10-13 14:50:48,940 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:48,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1170257874, now seen corresponding path program 1 times [2020-10-13 14:50:48,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:48,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162345750] [2020-10-13 14:50:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:50,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:50,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:52,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:52,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:50:52,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:52,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3090 [2020-10-13 14:50:52,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:52,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:52,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 14:50:52,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:50:52,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:50:52,680 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:52,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:52,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:52,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:52,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:52,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:52,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 14:50:52,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:52,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:52,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:52,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:52,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:52,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162345750] [2020-10-13 14:50:52,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:52,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:50:52,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686931534] [2020-10-13 14:50:52,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:50:52,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:50:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:50:52,803 INFO L87 Difference]: Start difference. First operand 220 states. Second operand 4 states. [2020-10-13 14:50:53,106 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-13 14:50:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:54,221 INFO L93 Difference]: Finished difference Result 443 states and 725 transitions. [2020-10-13 14:50:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:50:54,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-13 14:50:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:54,242 INFO L225 Difference]: With dead ends: 443 [2020-10-13 14:50:54,242 INFO L226 Difference]: Without dead ends: 332 [2020-10-13 14:50:54,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:50:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-13 14:50:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2020-10-13 14:50:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-13 14:50:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 494 transitions. [2020-10-13 14:50:54,343 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 494 transitions. Word has length 84 [2020-10-13 14:50:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:54,345 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 494 transitions. [2020-10-13 14:50:54,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:50:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 494 transitions. [2020-10-13 14:50:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:50:54,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:54,359 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] [2020-10-13 14:50:54,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:50:54,360 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2097746024, now seen corresponding path program 1 times [2020-10-13 14:50:54,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:54,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894888840] [2020-10-13 14:50:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:54,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:54,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:56,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:56,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:50:56,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:56,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1986 [2020-10-13 14:50:56,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:56,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:50:56,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 14:50:56,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:50:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:56,640 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:56,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:56,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:56,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:56,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:56,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:50:56,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:56,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:56,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:56,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:56,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894888840] [2020-10-13 14:50:56,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:56,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:56,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289052390] [2020-10-13 14:50:56,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:50:56,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:56,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:50:56,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:50:56,681 INFO L87 Difference]: Start difference. First operand 330 states and 494 transitions. Second operand 5 states. [2020-10-13 14:50:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:57,751 INFO L93 Difference]: Finished difference Result 507 states and 774 transitions. [2020-10-13 14:50:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:50:57,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-13 14:50:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:57,756 INFO L225 Difference]: With dead ends: 507 [2020-10-13 14:50:57,756 INFO L226 Difference]: Without dead ends: 505 [2020-10-13 14:50:57,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-10-13 14:50:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 332. [2020-10-13 14:50:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-13 14:50:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 496 transitions. [2020-10-13 14:50:57,782 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 496 transitions. Word has length 85 [2020-10-13 14:50:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:57,783 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 496 transitions. [2020-10-13 14:50:57,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:50:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 496 transitions. [2020-10-13 14:50:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 14:50:57,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:57,785 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] [2020-10-13 14:50:57,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:50:57,785 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:57,786 INFO L82 PathProgramCache]: Analyzing trace with hash 884071159, now seen corresponding path program 1 times [2020-10-13 14:50:57,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:57,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361296071] [2020-10-13 14:50:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:57,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:58,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:58,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:58,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 14:50:58,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-13 14:50:58,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:50:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:50:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:50:58,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:59,177 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:59,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:59,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:59,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:59,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:59,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:59,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:50:59,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:59,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:59,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361296071] [2020-10-13 14:50:59,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:59,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:50:59,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815884865] [2020-10-13 14:50:59,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:50:59,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:50:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:50:59,263 INFO L87 Difference]: Start difference. First operand 332 states and 496 transitions. Second operand 8 states. [2020-10-13 14:51:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:02,174 INFO L93 Difference]: Finished difference Result 1428 states and 2208 transitions. [2020-10-13 14:51:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:51:02,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-13 14:51:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:02,183 INFO L225 Difference]: With dead ends: 1428 [2020-10-13 14:51:02,183 INFO L226 Difference]: Without dead ends: 1180 [2020-10-13 14:51:02,195 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 [2020-10-13 14:51:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2020-10-13 14:51:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1172. [2020-10-13 14:51:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-10-13 14:51:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1805 transitions. [2020-10-13 14:51:02,273 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1805 transitions. Word has length 86 [2020-10-13 14:51:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:02,273 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1805 transitions. [2020-10-13 14:51:02,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:51:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1805 transitions. [2020-10-13 14:51:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:51:02,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:02,276 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] [2020-10-13 14:51:02,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:51:02,277 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1234469626, now seen corresponding path program 1 times [2020-10-13 14:51:02,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:02,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362984789] [2020-10-13 14:51:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:02,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:02,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:02,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:02,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:51:02,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:51:02,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-13 14:51:02,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:02,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:51:02,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:51:02,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:51:02,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:51:03,138 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:03,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:03,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:03,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:03,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:03,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 14:51:03,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:03,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:51:03,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:03,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:51:03,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:51:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:03,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362984789] [2020-10-13 14:51:03,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:03,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:51:03,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749079130] [2020-10-13 14:51:03,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:51:03,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:51:03,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:51:03,235 INFO L87 Difference]: Start difference. First operand 1172 states and 1805 transitions. Second operand 6 states. [2020-10-13 14:51:03,458 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-13 14:51:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:04,637 INFO L93 Difference]: Finished difference Result 3211 states and 4999 transitions. [2020-10-13 14:51:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:51:04,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:51:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:04,657 INFO L225 Difference]: With dead ends: 3211 [2020-10-13 14:51:04,658 INFO L226 Difference]: Without dead ends: 2085 [2020-10-13 14:51:04,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-10-13 14:51:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2083. [2020-10-13 14:51:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-10-13 14:51:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3223 transitions. [2020-10-13 14:51:04,872 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3223 transitions. Word has length 87 [2020-10-13 14:51:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:04,873 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 3223 transitions. [2020-10-13 14:51:04,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:51:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3223 transitions. [2020-10-13 14:51:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:51:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:04,882 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] [2020-10-13 14:51:04,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:51:04,882 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1120386679, now seen corresponding path program 1 times [2020-10-13 14:51:04,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:04,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945183196] [2020-10-13 14:51:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:04,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:05,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:05,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:51:05,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:51:05,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-13 14:51:05,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:51:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:51:05,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:51:05,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:51:05,818 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:05,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:05,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:05,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:05,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:05,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:05,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 14:51:05,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:51:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:05,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:51:05,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:51:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:05,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945183196] [2020-10-13 14:51:05,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:05,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:51:05,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487690618] [2020-10-13 14:51:05,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:51:05,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:05,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:51:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:51:05,891 INFO L87 Difference]: Start difference. First operand 2083 states and 3223 transitions. Second operand 6 states. [2020-10-13 14:51:06,121 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:51:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:07,377 INFO L93 Difference]: Finished difference Result 5845 states and 9109 transitions. [2020-10-13 14:51:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:51:07,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:51:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:07,399 INFO L225 Difference]: With dead ends: 5845 [2020-10-13 14:51:07,399 INFO L226 Difference]: Without dead ends: 3824 [2020-10-13 14:51:07,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2020-10-13 14:51:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3822. [2020-10-13 14:51:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3822 states. [2020-10-13 14:51:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3822 states to 3822 states and 5921 transitions. [2020-10-13 14:51:07,709 INFO L78 Accepts]: Start accepts. Automaton has 3822 states and 5921 transitions. Word has length 87 [2020-10-13 14:51:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:07,710 INFO L479 AbstractCegarLoop]: Abstraction has 3822 states and 5921 transitions. [2020-10-13 14:51:07,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:51:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3822 states and 5921 transitions. [2020-10-13 14:51:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:51:07,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:07,715 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] [2020-10-13 14:51:07,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:51:07,715 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:07,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1444582424, now seen corresponding path program 1 times [2020-10-13 14:51:07,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:07,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568656133] [2020-10-13 14:51:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:08,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:08,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:51:08,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:51:08,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-13 14:51:08,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:08,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:51:08,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:51:08,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:51:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:51:08,663 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:08,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:08,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:08,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:08,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:51:08,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:51:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:51:08,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:08,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568656133] [2020-10-13 14:51:08,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:08,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:51:08,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495853212] [2020-10-13 14:51:08,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:51:08,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:51:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:51:08,722 INFO L87 Difference]: Start difference. First operand 3822 states and 5921 transitions. Second operand 6 states. [2020-10-13 14:51:08,931 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:51:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:10,361 INFO L93 Difference]: Finished difference Result 10854 states and 16849 transitions. [2020-10-13 14:51:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:51:10,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:51:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:10,400 INFO L225 Difference]: With dead ends: 10854 [2020-10-13 14:51:10,400 INFO L226 Difference]: Without dead ends: 7117 [2020-10-13 14:51:10,412 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 [2020-10-13 14:51:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2020-10-13 14:51:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 7115. [2020-10-13 14:51:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7115 states. [2020-10-13 14:51:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 10968 transitions. [2020-10-13 14:51:10,897 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 10968 transitions. Word has length 87 [2020-10-13 14:51:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:10,898 INFO L479 AbstractCegarLoop]: Abstraction has 7115 states and 10968 transitions. [2020-10-13 14:51:10,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:51:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 10968 transitions. [2020-10-13 14:51:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:51:10,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:10,904 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] [2020-10-13 14:51:10,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:51:10,905 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash -145507673, now seen corresponding path program 1 times [2020-10-13 14:51:10,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:10,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232486585] [2020-10-13 14:51:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:10,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:11,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:11,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:51:11,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:51:11,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-13 14:51:11,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:51:11,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:51:11,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:51:11,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:51:11,773 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:11,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:11,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:11,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:11,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:11,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:11,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:51:11,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:51:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:11,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:51:11,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:11,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232486585] [2020-10-13 14:51:11,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:11,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:51:11,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253713726] [2020-10-13 14:51:11,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:51:11,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:11,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:51:11,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:51:11,823 INFO L87 Difference]: Start difference. First operand 7115 states and 10968 transitions. Second operand 6 states. [2020-10-13 14:51:12,009 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:51:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:13,924 INFO L93 Difference]: Finished difference Result 20439 states and 31567 transitions. [2020-10-13 14:51:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:51:13,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:51:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:14,000 INFO L225 Difference]: With dead ends: 20439 [2020-10-13 14:51:14,000 INFO L226 Difference]: Without dead ends: 13439 [2020-10-13 14:51:14,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2020-10-13 14:51:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 13437. [2020-10-13 14:51:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13437 states. [2020-10-13 14:51:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13437 states to 13437 states and 20637 transitions. [2020-10-13 14:51:15,161 INFO L78 Accepts]: Start accepts. Automaton has 13437 states and 20637 transitions. Word has length 87 [2020-10-13 14:51:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:15,161 INFO L479 AbstractCegarLoop]: Abstraction has 13437 states and 20637 transitions. [2020-10-13 14:51:15,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:51:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 13437 states and 20637 transitions. [2020-10-13 14:51:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:51:15,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:15,169 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] [2020-10-13 14:51:15,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:51:15,170 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1799091510, now seen corresponding path program 1 times [2020-10-13 14:51:15,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:15,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408152226] [2020-10-13 14:51:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:15,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:15,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:15,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:51:15,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:51:15,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-13 14:51:15,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:15,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:51:15,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:51:15,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:51:15,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:51:16,013 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:16,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:16,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:16,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:16,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:16,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:51:16,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:16,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:51:16,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:51:16,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:16,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408152226] [2020-10-13 14:51:16,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:16,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:51:16,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738495965] [2020-10-13 14:51:16,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:51:16,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:51:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:51:16,074 INFO L87 Difference]: Start difference. First operand 13437 states and 20637 transitions. Second operand 6 states. [2020-10-13 14:51:16,257 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-13 14:51:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:18,462 INFO L93 Difference]: Finished difference Result 39111 states and 60117 transitions. [2020-10-13 14:51:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:51:18,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:51:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:18,523 INFO L225 Difference]: With dead ends: 39111 [2020-10-13 14:51:18,523 INFO L226 Difference]: Without dead ends: 25823 [2020-10-13 14:51:18,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25823 states. [2020-10-13 14:51:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25823 to 25821. [2020-10-13 14:51:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25821 states. [2020-10-13 14:51:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25821 states to 25821 states and 39496 transitions. [2020-10-13 14:51:20,982 INFO L78 Accepts]: Start accepts. Automaton has 25821 states and 39496 transitions. Word has length 87 [2020-10-13 14:51:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:20,983 INFO L479 AbstractCegarLoop]: Abstraction has 25821 states and 39496 transitions. [2020-10-13 14:51:20,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:51:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 25821 states and 39496 transitions. [2020-10-13 14:51:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:51:20,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:20,992 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] [2020-10-13 14:51:20,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:51:20,993 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1277004660, now seen corresponding path program 1 times [2020-10-13 14:51:20,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:20,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58216129] [2020-10-13 14:51:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:21,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:22,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:22,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:51:22,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:51:22,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-13 14:51:22,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:51:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:51:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 14:51:22,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:22,802 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:22,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:22,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:22,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:22,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:22,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:22,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:51:22,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:51:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:51:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:22,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58216129] [2020-10-13 14:51:22,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:22,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:51:22,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389453242] [2020-10-13 14:51:22,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:51:22,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:22,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:51:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:22,843 INFO L87 Difference]: Start difference. First operand 25821 states and 39496 transitions. Second operand 9 states. [2020-10-13 14:51:23,058 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:51:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:31,886 INFO L93 Difference]: Finished difference Result 139186 states and 212229 transitions. [2020-10-13 14:51:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:51:31,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:51:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:32,176 INFO L225 Difference]: With dead ends: 139186 [2020-10-13 14:51:32,177 INFO L226 Difference]: Without dead ends: 113957 [2020-10-13 14:51:32,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:51:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113957 states. [2020-10-13 14:51:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113957 to 25903. [2020-10-13 14:51:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25903 states. [2020-10-13 14:51:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25903 states to 25903 states and 39585 transitions. [2020-10-13 14:51:36,430 INFO L78 Accepts]: Start accepts. Automaton has 25903 states and 39585 transitions. Word has length 88 [2020-10-13 14:51:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:36,430 INFO L479 AbstractCegarLoop]: Abstraction has 25903 states and 39585 transitions. [2020-10-13 14:51:36,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:51:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 25903 states and 39585 transitions. [2020-10-13 14:51:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:51:36,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:36,440 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] [2020-10-13 14:51:36,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:51:36,441 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash 907618540, now seen corresponding path program 1 times [2020-10-13 14:51:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:36,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682282141] [2020-10-13 14:51:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:36,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:36,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:37,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:38,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:38,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:51:38,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:51:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-13 14:51:38,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:51:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:51:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 14:51:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:38,503 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:38,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:38,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:38,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:38,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:38,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:51:38,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:51:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:51:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:38,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682282141] [2020-10-13 14:51:38,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:38,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:51:38,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662246099] [2020-10-13 14:51:38,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:51:38,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:38,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:51:38,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:38,547 INFO L87 Difference]: Start difference. First operand 25903 states and 39585 transitions. Second operand 9 states. [2020-10-13 14:51:38,786 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:51:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:51,741 INFO L93 Difference]: Finished difference Result 142895 states and 216918 transitions. [2020-10-13 14:51:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:51:51,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:51:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:53,245 INFO L225 Difference]: With dead ends: 142895 [2020-10-13 14:51:53,246 INFO L226 Difference]: Without dead ends: 124352 [2020-10-13 14:51:53,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:51:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124352 states. [2020-10-13 14:51:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124352 to 26189. [2020-10-13 14:51:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26189 states. [2020-10-13 14:51:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26189 states to 26189 states and 39950 transitions. [2020-10-13 14:51:56,556 INFO L78 Accepts]: Start accepts. Automaton has 26189 states and 39950 transitions. Word has length 88 [2020-10-13 14:51:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:56,557 INFO L479 AbstractCegarLoop]: Abstraction has 26189 states and 39950 transitions. [2020-10-13 14:51:56,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:51:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 26189 states and 39950 transitions. [2020-10-13 14:51:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:51:56,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:56,564 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] [2020-10-13 14:51:56,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:51:56,564 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:56,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1677172044, now seen corresponding path program 1 times [2020-10-13 14:51:56,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:56,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331596860] [2020-10-13 14:51:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:56,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:56,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:58,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:58,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:51:58,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:51:58,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-10-13 14:51:58,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:51:58,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:51:58,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 14:51:58,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:58,738 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:51:58,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:58,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:58,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:58,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:51:58,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:51:58,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:58,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:51:58,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:58,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331596860] [2020-10-13 14:51:58,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:58,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:51:58,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722968669] [2020-10-13 14:51:58,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:51:58,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:51:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:58,797 INFO L87 Difference]: Start difference. First operand 26189 states and 39950 transitions. Second operand 9 states. [2020-10-13 14:51:59,022 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:52:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:15,210 INFO L93 Difference]: Finished difference Result 143049 states and 218184 transitions. [2020-10-13 14:52:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:52:15,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:52:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:15,502 INFO L225 Difference]: With dead ends: 143049 [2020-10-13 14:52:15,503 INFO L226 Difference]: Without dead ends: 126938 [2020-10-13 14:52:15,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:52:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126938 states. [2020-10-13 14:52:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126938 to 26719. [2020-10-13 14:52:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26719 states. [2020-10-13 14:52:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26719 states to 26719 states and 40642 transitions. [2020-10-13 14:52:19,269 INFO L78 Accepts]: Start accepts. Automaton has 26719 states and 40642 transitions. Word has length 88 [2020-10-13 14:52:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:19,269 INFO L479 AbstractCegarLoop]: Abstraction has 26719 states and 40642 transitions. [2020-10-13 14:52:19,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:52:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26719 states and 40642 transitions. [2020-10-13 14:52:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:52:19,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:19,278 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] [2020-10-13 14:52:19,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:52:19,278 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1562759596, now seen corresponding path program 1 times [2020-10-13 14:52:19,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:19,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327126292] [2020-10-13 14:52:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:19,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:20,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:20,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:52:20,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:52:20,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-13 14:52:20,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:20,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:52:20,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:52:20,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 14:52:20,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:21,157 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:52:21,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:21,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:21,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:21,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:21,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:21,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:52:21,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:21,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:21,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:21,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327126292] [2020-10-13 14:52:21,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:21,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:52:21,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254118958] [2020-10-13 14:52:21,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:52:21,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:52:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:52:21,210 INFO L87 Difference]: Start difference. First operand 26719 states and 40642 transitions. Second operand 9 states. [2020-10-13 14:52:21,431 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:52:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:39,041 INFO L93 Difference]: Finished difference Result 114282 states and 172750 transitions. [2020-10-13 14:52:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:52:39,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:52:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:39,210 INFO L225 Difference]: With dead ends: 114282 [2020-10-13 14:52:39,211 INFO L226 Difference]: Without dead ends: 105880 [2020-10-13 14:52:39,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:52:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105880 states. [2020-10-13 14:52:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105880 to 27447. [2020-10-13 14:52:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27447 states. [2020-10-13 14:52:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27447 states to 27447 states and 41653 transitions. [2020-10-13 14:52:43,492 INFO L78 Accepts]: Start accepts. Automaton has 27447 states and 41653 transitions. Word has length 88 [2020-10-13 14:52:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:43,492 INFO L479 AbstractCegarLoop]: Abstraction has 27447 states and 41653 transitions. [2020-10-13 14:52:43,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:52:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 27447 states and 41653 transitions. [2020-10-13 14:52:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:52:43,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:43,501 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] [2020-10-13 14:52:43,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:52:43,501 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009036, now seen corresponding path program 1 times [2020-10-13 14:52:43,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:43,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140398379] [2020-10-13 14:52:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:43,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:43,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:44,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:44,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:52:44,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:52:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-13 14:52:44,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:52:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:52:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:52:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:44,856 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:52:44,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:44,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:44,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:44,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:44,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:44,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:52:44,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:44,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:44,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:44,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:44,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:44,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140398379] [2020-10-13 14:52:44,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:44,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:52:44,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954047195] [2020-10-13 14:52:44,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:52:44,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:52:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:52:44,899 INFO L87 Difference]: Start difference. First operand 27447 states and 41653 transitions. Second operand 9 states. [2020-10-13 14:52:45,128 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:53:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:03,333 INFO L93 Difference]: Finished difference Result 119098 states and 181215 transitions. [2020-10-13 14:53:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:53:03,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:53:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:03,478 INFO L225 Difference]: With dead ends: 119098 [2020-10-13 14:53:03,478 INFO L226 Difference]: Without dead ends: 112987 [2020-10-13 14:53:03,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:53:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112987 states. [2020-10-13 14:53:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112987 to 27447. [2020-10-13 14:53:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27447 states. [2020-10-13 14:53:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27447 states to 27447 states and 41637 transitions. [2020-10-13 14:53:09,208 INFO L78 Accepts]: Start accepts. Automaton has 27447 states and 41637 transitions. Word has length 88 [2020-10-13 14:53:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:09,209 INFO L479 AbstractCegarLoop]: Abstraction has 27447 states and 41637 transitions. [2020-10-13 14:53:09,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:53:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 27447 states and 41637 transitions. [2020-10-13 14:53:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:53:09,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:09,216 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, 1] [2020-10-13 14:53:09,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:53:09,216 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1413771914, now seen corresponding path program 1 times [2020-10-13 14:53:09,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:09,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227940110] [2020-10-13 14:53:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:09,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:09,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:09,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:10,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:10,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:53:10,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:53:10,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1659 [2020-10-13 14:53:10,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:10,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:10,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 14:53:10,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:53:10,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:11,080 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:53:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:11,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:11,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:11,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:11,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:53:11,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:11,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:11,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:11,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:11,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227940110] [2020-10-13 14:53:11,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:11,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:11,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779418124] [2020-10-13 14:53:11,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:11,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:11,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:11,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:11,113 INFO L87 Difference]: Start difference. First operand 27447 states and 41637 transitions. Second operand 4 states. [2020-10-13 14:53:11,378 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:53:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:17,708 INFO L93 Difference]: Finished difference Result 57430 states and 87405 transitions. [2020-10-13 14:53:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:17,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:53:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:17,752 INFO L225 Difference]: With dead ends: 57430 [2020-10-13 14:53:17,752 INFO L226 Difference]: Without dead ends: 36028 [2020-10-13 14:53:17,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36028 states. [2020-10-13 14:53:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36028 to 35770. [2020-10-13 14:53:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35770 states. [2020-10-13 14:53:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35770 states to 35770 states and 53726 transitions. [2020-10-13 14:53:23,434 INFO L78 Accepts]: Start accepts. Automaton has 35770 states and 53726 transitions. Word has length 89 [2020-10-13 14:53:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:23,434 INFO L479 AbstractCegarLoop]: Abstraction has 35770 states and 53726 transitions. [2020-10-13 14:53:23,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 35770 states and 53726 transitions. [2020-10-13 14:53:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:53:23,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:23,443 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, 1] [2020-10-13 14:53:23,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:53:23,444 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash -862358602, now seen corresponding path program 1 times [2020-10-13 14:53:23,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:23,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414047460] [2020-10-13 14:53:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:23,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:23,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:23,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:53:23,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:23,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 14:53:23,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:53:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:53:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 14:53:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:23,772 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:53:23,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:23,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:23,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:23,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:23,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:53:23,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:23,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:23,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:23,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:23,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:23,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414047460] [2020-10-13 14:53:23,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:23,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:53:23,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978384909] [2020-10-13 14:53:23,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:53:23,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:53:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:23,801 INFO L87 Difference]: Start difference. First operand 35770 states and 53726 transitions. Second operand 5 states. [2020-10-13 14:53:24,014 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:53:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:35,225 INFO L93 Difference]: Finished difference Result 96902 states and 145584 transitions. [2020-10-13 14:53:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:53:35,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-13 14:53:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:35,321 INFO L225 Difference]: With dead ends: 96902 [2020-10-13 14:53:35,321 INFO L226 Difference]: Without dead ends: 63972 [2020-10-13 14:53:35,357 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 [2020-10-13 14:53:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63972 states. [2020-10-13 14:53:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63972 to 63554. [2020-10-13 14:53:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63554 states. [2020-10-13 14:53:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63554 states to 63554 states and 94654 transitions. [2020-10-13 14:53:46,577 INFO L78 Accepts]: Start accepts. Automaton has 63554 states and 94654 transitions. Word has length 89 [2020-10-13 14:53:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:46,577 INFO L479 AbstractCegarLoop]: Abstraction has 63554 states and 94654 transitions. [2020-10-13 14:53:46,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:53:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 63554 states and 94654 transitions. [2020-10-13 14:53:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:53:46,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:46,585 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, 1] [2020-10-13 14:53:46,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:53:46,586 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash -885359912, now seen corresponding path program 1 times [2020-10-13 14:53:46,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:46,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280305319] [2020-10-13 14:53:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:47,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:48,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:48,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:53:48,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:53:48,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-13 14:53:48,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 14:53:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:53:48,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:48,374 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:53:48,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:48,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:48,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:48,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:48,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:48,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:53:48,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:48,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280305319] [2020-10-13 14:53:48,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:48,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:48,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227317593] [2020-10-13 14:53:48,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:48,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:48,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:48,400 INFO L87 Difference]: Start difference. First operand 63554 states and 94654 transitions. Second operand 4 states. [2020-10-13 14:53:48,580 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:54:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:05,932 INFO L93 Difference]: Finished difference Result 140892 states and 210131 transitions. [2020-10-13 14:54:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:05,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:54:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:06,055 INFO L225 Difference]: With dead ends: 140892 [2020-10-13 14:54:06,055 INFO L226 Difference]: Without dead ends: 97382 [2020-10-13 14:54:06,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97382 states. [2020-10-13 14:54:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97382 to 96788. [2020-10-13 14:54:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96788 states. [2020-10-13 14:54:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96788 states to 96788 states and 142849 transitions. [2020-10-13 14:54:23,941 INFO L78 Accepts]: Start accepts. Automaton has 96788 states and 142849 transitions. Word has length 89 [2020-10-13 14:54:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:23,941 INFO L479 AbstractCegarLoop]: Abstraction has 96788 states and 142849 transitions. [2020-10-13 14:54:23,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:23,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96788 states and 142849 transitions. [2020-10-13 14:54:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:54:23,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:23,951 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, 1] [2020-10-13 14:54:23,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:54:23,952 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1903366390, now seen corresponding path program 1 times [2020-10-13 14:54:23,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:23,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8676176] [2020-10-13 14:54:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:23,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:24,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:25,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:25,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:54:25,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:54:25,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1802 [2020-10-13 14:54:25,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:54:25,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:54:25,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:25,955 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:54:25,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:25,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:25,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:25,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:25,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:25,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:54:25,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:25,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:25,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:25,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:25,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:25,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8676176] [2020-10-13 14:54:25,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:25,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:25,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091163866] [2020-10-13 14:54:25,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:25,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:25,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:25,979 INFO L87 Difference]: Start difference. First operand 96788 states and 142849 transitions. Second operand 4 states. [2020-10-13 14:54:26,169 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 149