/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:08:20,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:08:20,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:08:20,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:08:20,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:08:20,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:08:20,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:08:20,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:08:20,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:08:20,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:08:20,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:08:20,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:08:20,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:08:20,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:08:20,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:08:20,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:08:20,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:08:20,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:08:20,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:08:20,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:08:20,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:08:20,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:08:20,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:08:20,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:08:20,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:08:20,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:08:20,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:08:20,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:08:20,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:08:20,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:08:20,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:08:20,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:08:20,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:08:20,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:08:20,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:08:20,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:08:20,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:08:20,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:08:20,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:08:20,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:08:20,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:08:20,924 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 [2020-10-14 09:08:20,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:08:20,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:08:20,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:08:20,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:08:20,947 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:08:20,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:08:20,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:08:20,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:08:20,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:08:20,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:08:20,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:08:20,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:08:20,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:08:20,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:08:20,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:08:20,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:08:20,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:08:20,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:08:20,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:08:20,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:08:20,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:08:20,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:08:20,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:08:20,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:08:20,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:08:20,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:08:20,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:08:20,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:08:20,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:08:20,952 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:08:21,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:08:21,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:08:21,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:08:21,321 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:08:21,321 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:08:21,322 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:08:21,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44d8a7e0e/3d2e0b4877f1487a9145d3e57193d0c6/FLAG3184327bc [2020-10-14 09:08:21,856 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:08:21,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:08:21,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44d8a7e0e/3d2e0b4877f1487a9145d3e57193d0c6/FLAG3184327bc [2020-10-14 09:08:22,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44d8a7e0e/3d2e0b4877f1487a9145d3e57193d0c6 [2020-10-14 09:08:22,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:08:22,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:08:22,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:08:22,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:08:22,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:08:22,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b7cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22, skipping insertion in model container [2020-10-14 09:08:22,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:08:22,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:08:22,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:08:22,564 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:08:22,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:08:22,750 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:08:22,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22 WrapperNode [2020-10-14 09:08:22,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:08:22,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:08:22,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:08:22,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:08:22,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (1/1) ... [2020-10-14 09:08:22,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:08:22,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:08:22,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:08:22,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:08:22,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (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 [2020-10-14 09:08:22,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:08:22,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:08:22,880 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:08:22,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:08:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:08:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:08:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:08:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:08:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:08:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:08:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:08:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:08:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:08:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:08:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:08:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:08:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:08:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:08:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:08:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:08:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:08:23,496 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:08:23,496 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:08:23,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:08:23 BoogieIcfgContainer [2020-10-14 09:08:23,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:08:23,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:08:23,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:08:23,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:08:23,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:08:22" (1/3) ... [2020-10-14 09:08:23,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8758be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:08:23, skipping insertion in model container [2020-10-14 09:08:23,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:08:22" (2/3) ... [2020-10-14 09:08:23,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8758be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:08:23, skipping insertion in model container [2020-10-14 09:08:23,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:08:23" (3/3) ... [2020-10-14 09:08:23,512 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:08:23,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:08:23,532 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:08:23,547 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:08:23,575 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:08:23,576 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:08:23,576 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:08:23,576 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:08:23,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:08:23,577 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:08:23,577 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:08:23,577 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:08:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-14 09:08:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 09:08:23,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:23,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:23,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2035014399, now seen corresponding path program 1 times [2020-10-14 09:08:23,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:23,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649776812] [2020-10-14 09:08:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:24,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:24,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:24,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:25,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:27,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 09:08:27,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:08:27,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3321 [2020-10-14 09:08:27,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:27,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:27,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:27,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:08:27,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:08:27,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:08:27,508 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:27,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:27,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:27,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:27,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:27,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:08:27,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:27,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:27,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:27,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649776812] [2020-10-14 09:08:27,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:27,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:27,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641009996] [2020-10-14 09:08:27,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:27,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:27,595 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2020-10-14 09:08:27,881 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:08:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:29,152 INFO L93 Difference]: Finished difference Result 267 states and 426 transitions. [2020-10-14 09:08:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:29,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-14 09:08:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:29,192 INFO L225 Difference]: With dead ends: 267 [2020-10-14 09:08:29,192 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 09:08:29,199 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 [2020-10-14 09:08:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 09:08:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-14 09:08:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 09:08:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 257 transitions. [2020-10-14 09:08:29,344 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 257 transitions. Word has length 52 [2020-10-14 09:08:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:29,345 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 257 transitions. [2020-10-14 09:08:29,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 257 transitions. [2020-10-14 09:08:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 09:08:29,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:29,350 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] [2020-10-14 09:08:29,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:08:29,351 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:29,353 INFO L82 PathProgramCache]: Analyzing trace with hash 743095595, now seen corresponding path program 1 times [2020-10-14 09:08:29,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:29,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056404944] [2020-10-14 09:08:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:29,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:29,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:29,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:29,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:30,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:30,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 09:08:30,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:08:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1429 [2020-10-14 09:08:30,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:30,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:08:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 09:08:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:31,067 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:31,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:31,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:31,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:31,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:31,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:08:31,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:31,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:31,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:31,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:31,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056404944] [2020-10-14 09:08:31,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:31,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:31,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354910227] [2020-10-14 09:08:31,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:31,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:31,100 INFO L87 Difference]: Start difference. First operand 173 states and 257 transitions. Second operand 4 states. [2020-10-14 09:08:31,296 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:08:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:31,821 INFO L93 Difference]: Finished difference Result 425 states and 657 transitions. [2020-10-14 09:08:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:31,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-14 09:08:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:31,825 INFO L225 Difference]: With dead ends: 425 [2020-10-14 09:08:31,825 INFO L226 Difference]: Without dead ends: 283 [2020-10-14 09:08:31,827 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 [2020-10-14 09:08:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-14 09:08:31,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2020-10-14 09:08:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-14 09:08:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 428 transitions. [2020-10-14 09:08:31,851 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 428 transitions. Word has length 53 [2020-10-14 09:08:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:31,852 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 428 transitions. [2020-10-14 09:08:31,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 428 transitions. [2020-10-14 09:08:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 09:08:31,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:31,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:31,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:08:31,855 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1272360834, now seen corresponding path program 1 times [2020-10-14 09:08:31,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:31,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406535583] [2020-10-14 09:08:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:32,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 09:08:32,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:08:32,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-14 09:08:32,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:32,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:08:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:08:32,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:32,710 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:32,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:32,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:32,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:32,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:32,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:08:32,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:32,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:32,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406535583] [2020-10-14 09:08:32,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:32,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:32,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661785479] [2020-10-14 09:08:32,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:32,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:32,743 INFO L87 Difference]: Start difference. First operand 281 states and 428 transitions. Second operand 4 states. [2020-10-14 09:08:32,885 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:08:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:33,338 INFO L93 Difference]: Finished difference Result 717 states and 1118 transitions. [2020-10-14 09:08:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:33,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-14 09:08:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:33,342 INFO L225 Difference]: With dead ends: 717 [2020-10-14 09:08:33,342 INFO L226 Difference]: Without dead ends: 467 [2020-10-14 09:08:33,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-14 09:08:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2020-10-14 09:08:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-14 09:08:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 716 transitions. [2020-10-14 09:08:33,372 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 716 transitions. Word has length 54 [2020-10-14 09:08:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:33,373 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 716 transitions. [2020-10-14 09:08:33,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 716 transitions. [2020-10-14 09:08:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:08:33,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:33,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:33,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:08:33,375 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash -136629004, now seen corresponding path program 1 times [2020-10-14 09:08:33,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:33,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229210162] [2020-10-14 09:08:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:33,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:33,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:08:33,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:08:33,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-14 09:08:33,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:33,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:08:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:08:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:33,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:33,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:33,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:33,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:33,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:08:33,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:33,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:33,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:33,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:33,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:33,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:33,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229210162] [2020-10-14 09:08:33,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:33,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:33,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018915492] [2020-10-14 09:08:33,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:33,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:33,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:33,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:33,904 INFO L87 Difference]: Start difference. First operand 465 states and 716 transitions. Second operand 4 states. [2020-10-14 09:08:34,069 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:08:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:34,659 INFO L93 Difference]: Finished difference Result 1205 states and 1878 transitions. [2020-10-14 09:08:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:34,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-14 09:08:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:34,668 INFO L225 Difference]: With dead ends: 1205 [2020-10-14 09:08:34,668 INFO L226 Difference]: Without dead ends: 771 [2020-10-14 09:08:34,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-10-14 09:08:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 769. [2020-10-14 09:08:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2020-10-14 09:08:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1184 transitions. [2020-10-14 09:08:34,716 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1184 transitions. Word has length 55 [2020-10-14 09:08:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:34,717 INFO L479 AbstractCegarLoop]: Abstraction has 769 states and 1184 transitions. [2020-10-14 09:08:34,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1184 transitions. [2020-10-14 09:08:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:08:34,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:34,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:34,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:08:34,721 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:34,722 INFO L82 PathProgramCache]: Analyzing trace with hash 417494013, now seen corresponding path program 1 times [2020-10-14 09:08:34,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:34,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952361902] [2020-10-14 09:08:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:35,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:35,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:08:35,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:08:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-14 09:08:35,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:35,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:35,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:08:35,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:08:35,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:08:35,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:35,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:35,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:35,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:35,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:35,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:35,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:08:35,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:35,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:35,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:35,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:35,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:35,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:36,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952361902] [2020-10-14 09:08:36,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:36,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 09:08:36,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898993855] [2020-10-14 09:08:36,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:08:36,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:36,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:08:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:08:36,010 INFO L87 Difference]: Start difference. First operand 769 states and 1184 transitions. Second operand 7 states. [2020-10-14 09:08:36,162 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-14 09:08:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:36,789 INFO L93 Difference]: Finished difference Result 4459 states and 6949 transitions. [2020-10-14 09:08:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 09:08:36,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-14 09:08:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:36,812 INFO L225 Difference]: With dead ends: 4459 [2020-10-14 09:08:36,812 INFO L226 Difference]: Without dead ends: 3721 [2020-10-14 09:08:36,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:08:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2020-10-14 09:08:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 1505. [2020-10-14 09:08:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-10-14 09:08:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2304 transitions. [2020-10-14 09:08:36,935 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2304 transitions. Word has length 56 [2020-10-14 09:08:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:36,938 INFO L479 AbstractCegarLoop]: Abstraction has 1505 states and 2304 transitions. [2020-10-14 09:08:36,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:08:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2304 transitions. [2020-10-14 09:08:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:08:36,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:36,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:36,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:08:36,944 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash 38879762, now seen corresponding path program 1 times [2020-10-14 09:08:36,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:36,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042248767] [2020-10-14 09:08:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:36,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:37,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:37,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:08:37,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:08:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-14 09:08:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:37,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:08:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 09:08:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:08:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:37,520 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:37,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:37,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:37,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:37,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:37,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:08:37,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:37,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:37,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:08:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:37,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042248767] [2020-10-14 09:08:37,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:37,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:08:37,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435064796] [2020-10-14 09:08:37,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:08:37,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:37,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:08:37,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:37,557 INFO L87 Difference]: Start difference. First operand 1505 states and 2304 transitions. Second operand 5 states. [2020-10-14 09:08:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:38,350 INFO L93 Difference]: Finished difference Result 3043 states and 4641 transitions. [2020-10-14 09:08:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:08:38,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-14 09:08:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:38,367 INFO L225 Difference]: With dead ends: 3043 [2020-10-14 09:08:38,367 INFO L226 Difference]: Without dead ends: 3041 [2020-10-14 09:08:38,369 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 [2020-10-14 09:08:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2020-10-14 09:08:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1569. [2020-10-14 09:08:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1569 states. [2020-10-14 09:08:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2368 transitions. [2020-10-14 09:08:38,496 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2368 transitions. Word has length 57 [2020-10-14 09:08:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:38,496 INFO L479 AbstractCegarLoop]: Abstraction has 1569 states and 2368 transitions. [2020-10-14 09:08:38,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:08:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2368 transitions. [2020-10-14 09:08:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:08:38,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:38,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:38,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:08:38,499 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1214892364, now seen corresponding path program 1 times [2020-10-14 09:08:38,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:38,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803643358] [2020-10-14 09:08:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:38,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:38,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:38,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:38,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:08:38,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:08:38,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-14 09:08:38,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:38,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:08:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 09:08:38,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:39,021 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:39,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:39,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:39,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:39,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:39,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:08:39,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:39,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:39,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:39,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:39,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:39,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:39,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803643358] [2020-10-14 09:08:39,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:39,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:39,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905450813] [2020-10-14 09:08:39,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:39,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:39,059 INFO L87 Difference]: Start difference. First operand 1569 states and 2368 transitions. Second operand 4 states. [2020-10-14 09:08:39,239 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-14 09:08:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:39,792 INFO L93 Difference]: Finished difference Result 3895 states and 5900 transitions. [2020-10-14 09:08:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:39,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 09:08:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:39,804 INFO L225 Difference]: With dead ends: 3895 [2020-10-14 09:08:39,805 INFO L226 Difference]: Without dead ends: 2357 [2020-10-14 09:08:39,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2020-10-14 09:08:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2355. [2020-10-14 09:08:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2355 states. [2020-10-14 09:08:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3546 transitions. [2020-10-14 09:08:40,020 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3546 transitions. Word has length 58 [2020-10-14 09:08:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:40,022 INFO L479 AbstractCegarLoop]: Abstraction has 2355 states and 3546 transitions. [2020-10-14 09:08:40,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3546 transitions. [2020-10-14 09:08:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:08:40,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:40,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:40,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:08:40,025 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1349339258, now seen corresponding path program 1 times [2020-10-14 09:08:40,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:40,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314787722] [2020-10-14 09:08:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:40,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:40,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:40,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:40,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:08:40,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:08:40,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-14 09:08:40,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:40,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:40,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:08:40,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:08:40,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 09:08:40,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:41,136 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:41,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:41,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:41,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:41,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:41,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:41,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:08:41,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:41,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:08:41,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314787722] [2020-10-14 09:08:41,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:08:41,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:08:41,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545167770] [2020-10-14 09:08:41,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:08:41,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:08:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:41,208 INFO L87 Difference]: Start difference. First operand 2355 states and 3546 transitions. Second operand 5 states. [2020-10-14 09:08:41,397 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-14 09:08:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:42,183 INFO L93 Difference]: Finished difference Result 5369 states and 8125 transitions. [2020-10-14 09:08:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:08:42,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-14 09:08:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:42,203 INFO L225 Difference]: With dead ends: 5369 [2020-10-14 09:08:42,203 INFO L226 Difference]: Without dead ends: 3831 [2020-10-14 09:08:42,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2020-10-14 09:08:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3827. [2020-10-14 09:08:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3827 states. [2020-10-14 09:08:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 5754 transitions. [2020-10-14 09:08:42,486 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 5754 transitions. Word has length 79 [2020-10-14 09:08:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:42,487 INFO L479 AbstractCegarLoop]: Abstraction has 3827 states and 5754 transitions. [2020-10-14 09:08:42,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:08:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 5754 transitions. [2020-10-14 09:08:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:08:42,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:42,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:42,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:08:42,496 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1384911737, now seen corresponding path program 1 times [2020-10-14 09:08:42,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:42,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342468364] [2020-10-14 09:08:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:42,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:42,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:42,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:43,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:47,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:47,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:08:47,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:08:47,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4457 [2020-10-14 09:08:47,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:47,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:47,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:47,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:08:47,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:08:47,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:47,159 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:47,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:47,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:47,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:47,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:47,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:08:47,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:47,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:47,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:47,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342468364] [2020-10-14 09:08:47,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:47,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:47,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109386330] [2020-10-14 09:08:47,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:47,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:47,192 INFO L87 Difference]: Start difference. First operand 3827 states and 5754 transitions. Second operand 4 states. [2020-10-14 09:08:47,320 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:08:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:48,184 INFO L93 Difference]: Finished difference Result 10975 states and 16476 transitions. [2020-10-14 09:08:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:48,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:08:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:48,221 INFO L225 Difference]: With dead ends: 10975 [2020-10-14 09:08:48,221 INFO L226 Difference]: Without dead ends: 7181 [2020-10-14 09:08:48,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7181 states. [2020-10-14 09:08:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7181 to 7179. [2020-10-14 09:08:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7179 states. [2020-10-14 09:08:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 10674 transitions. [2020-10-14 09:08:48,727 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 10674 transitions. Word has length 80 [2020-10-14 09:08:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:48,727 INFO L479 AbstractCegarLoop]: Abstraction has 7179 states and 10674 transitions. [2020-10-14 09:08:48,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 10674 transitions. [2020-10-14 09:08:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:08:48,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:48,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:48,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:08:48,732 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1871747568, now seen corresponding path program 1 times [2020-10-14 09:08:48,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:48,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725924161] [2020-10-14 09:08:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:48,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:48,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:48,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:49,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:49,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:52,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:52,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:08:52,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:08:52,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3865 [2020-10-14 09:08:52,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:52,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:08:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:08:52,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:52,777 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:52,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:52,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:52,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:52,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:52,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:52,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:08:52,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:52,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:52,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725924161] [2020-10-14 09:08:52,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:52,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:52,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649122183] [2020-10-14 09:08:52,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:52,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:52,816 INFO L87 Difference]: Start difference. First operand 7179 states and 10674 transitions. Second operand 4 states. [2020-10-14 09:08:52,954 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:08:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:54,234 INFO L93 Difference]: Finished difference Result 20591 states and 30516 transitions. [2020-10-14 09:08:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:54,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:08:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:54,286 INFO L225 Difference]: With dead ends: 20591 [2020-10-14 09:08:54,286 INFO L226 Difference]: Without dead ends: 13445 [2020-10-14 09:08:54,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13445 states. [2020-10-14 09:08:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13445 to 13443. [2020-10-14 09:08:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13443 states. [2020-10-14 09:08:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 19714 transitions. [2020-10-14 09:08:55,284 INFO L78 Accepts]: Start accepts. Automaton has 13443 states and 19714 transitions. Word has length 80 [2020-10-14 09:08:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:55,285 INFO L479 AbstractCegarLoop]: Abstraction has 13443 states and 19714 transitions. [2020-10-14 09:08:55,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13443 states and 19714 transitions. [2020-10-14 09:08:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:08:55,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:55,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:55,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:08:55,293 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash 93539112, now seen corresponding path program 1 times [2020-10-14 09:08:55,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:55,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935092818] [2020-10-14 09:08:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:55,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:55,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:55,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:55,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:58,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:58,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:08:58,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:08:58,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2922 [2020-10-14 09:08:58,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:58,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:58,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:58,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 09:08:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:08:58,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:58,377 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:58,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:58,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:58,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:58,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:58,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:08:58,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:58,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:58,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:58,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935092818] [2020-10-14 09:08:58,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:58,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:58,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42303509] [2020-10-14 09:08:58,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:58,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:58,576 INFO L87 Difference]: Start difference. First operand 13443 states and 19714 transitions. Second operand 4 states. [2020-10-14 09:08:58,761 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:09:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:00,546 INFO L93 Difference]: Finished difference Result 38503 states and 56196 transitions. [2020-10-14 09:09:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:00,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:09:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:00,612 INFO L225 Difference]: With dead ends: 38503 [2020-10-14 09:09:00,612 INFO L226 Difference]: Without dead ends: 25093 [2020-10-14 09:09:00,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25093 states. [2020-10-14 09:09:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25093 to 25091. [2020-10-14 09:09:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25091 states. [2020-10-14 09:09:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25091 states to 25091 states and 36194 transitions. [2020-10-14 09:09:02,635 INFO L78 Accepts]: Start accepts. Automaton has 25091 states and 36194 transitions. Word has length 80 [2020-10-14 09:09:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:02,635 INFO L479 AbstractCegarLoop]: Abstraction has 25091 states and 36194 transitions. [2020-10-14 09:09:02,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 25091 states and 36194 transitions. [2020-10-14 09:09:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:09:02,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:02,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:02,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:09:02,643 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash 987723763, now seen corresponding path program 1 times [2020-10-14 09:09:02,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:02,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001274462] [2020-10-14 09:09:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:02,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:02,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:02,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:03,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:05,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:05,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:09:05,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:09:05,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-14 09:09:05,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:05,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 09:09:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 09:09:05,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:05,180 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:09:05,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:05,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:05,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:05,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:05,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:05,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:09:05,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:05,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:05,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:05,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001274462] [2020-10-14 09:09:05,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:05,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:05,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017477462] [2020-10-14 09:09:05,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:05,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:05,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:05,232 INFO L87 Difference]: Start difference. First operand 25091 states and 36194 transitions. Second operand 4 states. [2020-10-14 09:09:05,391 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:09:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:07,664 INFO L93 Difference]: Finished difference Result 71239 states and 102116 transitions. [2020-10-14 09:09:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:07,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:09:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:07,767 INFO L225 Difference]: With dead ends: 71239 [2020-10-14 09:09:07,768 INFO L226 Difference]: Without dead ends: 46181 [2020-10-14 09:09:07,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46181 states. [2020-10-14 09:09:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46181 to 46179. [2020-10-14 09:09:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46179 states. [2020-10-14 09:09:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46179 states to 46179 states and 65314 transitions. [2020-10-14 09:09:09,937 INFO L78 Accepts]: Start accepts. Automaton has 46179 states and 65314 transitions. Word has length 80 [2020-10-14 09:09:09,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:09,937 INFO L479 AbstractCegarLoop]: Abstraction has 46179 states and 65314 transitions. [2020-10-14 09:09:09,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 46179 states and 65314 transitions. [2020-10-14 09:09:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:09:09,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:09,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:09,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:09:09,951 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash 354678689, now seen corresponding path program 1 times [2020-10-14 09:09:09,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:09,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001364316] [2020-10-14 09:09:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:10,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:10,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:10,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:14,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:14,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:09:14,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:09:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:09:14,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:14,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:09:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 09:09:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 09:09:14,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:15,142 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:09:15,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:15,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:15,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:15,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:15,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:15,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:09:15,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:15,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:15,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:15,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:15,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:09:15,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001364316] [2020-10-14 09:09:15,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:09:15,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:09:15,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324367306] [2020-10-14 09:09:15,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:09:15,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:09:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:09:15,176 INFO L87 Difference]: Start difference. First operand 46179 states and 65314 transitions. Second operand 7 states. [2020-10-14 09:09:15,328 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:09:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:23,614 INFO L93 Difference]: Finished difference Result 194225 states and 278931 transitions. [2020-10-14 09:09:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:09:23,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:09:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:23,941 INFO L225 Difference]: With dead ends: 194225 [2020-10-14 09:09:23,941 INFO L226 Difference]: Without dead ends: 170767 [2020-10-14 09:09:24,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:09:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170767 states. [2020-10-14 09:09:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170767 to 75587. [2020-10-14 09:09:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75587 states. [2020-10-14 09:09:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75587 states to 75587 states and 107042 transitions. [2020-10-14 09:09:30,222 INFO L78 Accepts]: Start accepts. Automaton has 75587 states and 107042 transitions. Word has length 82 [2020-10-14 09:09:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:30,222 INFO L479 AbstractCegarLoop]: Abstraction has 75587 states and 107042 transitions. [2020-10-14 09:09:30,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:09:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 75587 states and 107042 transitions. [2020-10-14 09:09:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:09:30,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:30,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:30,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:09:30,237 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1688404959, now seen corresponding path program 1 times [2020-10-14 09:09:30,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:30,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653369788] [2020-10-14 09:09:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:30,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:30,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:30,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:30,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:31,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:31,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:09:31,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:09:31,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1665 [2020-10-14 09:09:31,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:31,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:09:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:09:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 09:09:31,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:32,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:32,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:32,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 09:09:32,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653369788] [2020-10-14 09:09:32,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:09:32,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:09:32,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689060222] [2020-10-14 09:09:32,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:09:32,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:32,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:09:32,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:09:32,100 INFO L87 Difference]: Start difference. First operand 75587 states and 107042 transitions. Second operand 7 states. [2020-10-14 09:09:32,254 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:09:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:42,469 INFO L93 Difference]: Finished difference Result 219825 states and 312595 transitions. [2020-10-14 09:09:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:09:42,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:09:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:42,774 INFO L225 Difference]: With dead ends: 219825 [2020-10-14 09:09:42,774 INFO L226 Difference]: Without dead ends: 175855 [2020-10-14 09:09:42,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:09:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175855 states. [2020-10-14 09:09:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175855 to 87011. [2020-10-14 09:09:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87011 states. [2020-10-14 09:09:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87011 states to 87011 states and 123298 transitions. [2020-10-14 09:09:48,323 INFO L78 Accepts]: Start accepts. Automaton has 87011 states and 123298 transitions. Word has length 82 [2020-10-14 09:09:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:48,323 INFO L479 AbstractCegarLoop]: Abstraction has 87011 states and 123298 transitions. [2020-10-14 09:09:48,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:09:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 87011 states and 123298 transitions. [2020-10-14 09:09:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:09:48,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:48,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:48,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:09:48,334 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:48,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2017842320, now seen corresponding path program 1 times [2020-10-14 09:09:48,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:48,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889745449] [2020-10-14 09:09:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:48,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:48,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:48,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:49,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 09:09:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:49,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:49,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:49,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:49,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:09:49,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:49,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:49,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 09:09:49,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889745449] [2020-10-14 09:09:49,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:09:49,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:09:49,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498825796] [2020-10-14 09:09:49,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:09:49,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:09:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:09:49,864 INFO L87 Difference]: Start difference. First operand 87011 states and 123298 transitions. Second operand 7 states. [2020-10-14 09:09:51,157 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:10:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:01,592 INFO L93 Difference]: Finished difference Result 232889 states and 331011 transitions. [2020-10-14 09:10:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:10:01,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:10:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:01,857 INFO L225 Difference]: With dead ends: 232889 [2020-10-14 09:10:01,858 INFO L226 Difference]: Without dead ends: 188919 [2020-10-14 09:10:01,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:10:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188919 states. [2020-10-14 09:10:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188919 to 98435. [2020-10-14 09:10:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98435 states. [2020-10-14 09:10:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98435 states to 98435 states and 139554 transitions. [2020-10-14 09:10:10,675 INFO L78 Accepts]: Start accepts. Automaton has 98435 states and 139554 transitions. Word has length 82 [2020-10-14 09:10:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:10,675 INFO L479 AbstractCegarLoop]: Abstraction has 98435 states and 139554 transitions. [2020-10-14 09:10:10,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:10:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 98435 states and 139554 transitions. [2020-10-14 09:10:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:10:10,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:10,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:10,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:10:10,685 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1311972802, now seen corresponding path program 1 times [2020-10-14 09:10:10,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:10,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067396895] [2020-10-14 09:10:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:10,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:10,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:13,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:13,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:15,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:15,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:10:15,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:10:15,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:10:15,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:15,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:15,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:10:15,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:10:15,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 09:10:15,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:15,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:15,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:15,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:15,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:15,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:15,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:10:15,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:15,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:15,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 09:10:15,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067396895] [2020-10-14 09:10:15,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:10:15,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:10:15,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369048226] [2020-10-14 09:10:15,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:10:15,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:15,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:10:15,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:10:15,874 INFO L87 Difference]: Start difference. First operand 98435 states and 139554 transitions. Second operand 7 states. [2020-10-14 09:10:16,028 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:10:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:28,165 INFO L93 Difference]: Finished difference Result 244553 states and 347417 transitions. [2020-10-14 09:10:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:10:28,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:10:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:28,434 INFO L225 Difference]: With dead ends: 244553 [2020-10-14 09:10:28,434 INFO L226 Difference]: Without dead ends: 200583 [2020-10-14 09:10:28,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:10:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200583 states. [2020-10-14 09:10:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200583 to 109859. [2020-10-14 09:10:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109859 states. [2020-10-14 09:10:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109859 states to 109859 states and 155810 transitions. [2020-10-14 09:10:39,387 INFO L78 Accepts]: Start accepts. Automaton has 109859 states and 155810 transitions. Word has length 82 [2020-10-14 09:10:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:39,387 INFO L479 AbstractCegarLoop]: Abstraction has 109859 states and 155810 transitions. [2020-10-14 09:10:39,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:10:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 109859 states and 155810 transitions. [2020-10-14 09:10:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 09:10:39,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:39,401 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:39,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:10:39,401 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:39,402 INFO L82 PathProgramCache]: Analyzing trace with hash 24442727, now seen corresponding path program 1 times [2020-10-14 09:10:39,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:39,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441476727] [2020-10-14 09:10:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:39,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:39,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:39,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:39,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:40,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:40,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:40,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:40,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:41,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:41,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:41,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:41,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:41,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:42,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:42,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:42,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:44,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:44,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 09:10:44,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 09:10:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:10:44,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:44,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:10:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:10:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 09:10:44,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:44,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:44,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:44,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:44,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:44,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:10:44,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441476727] [2020-10-14 09:10:44,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:10:44,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:10:44,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131545436] [2020-10-14 09:10:44,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:10:44,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:10:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:10:44,578 INFO L87 Difference]: Start difference. First operand 109859 states and 155810 transitions. Second operand 6 states. [2020-10-14 09:10:44,711 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:24,980 INFO L93 Difference]: Finished difference Result 667931 states and 941066 transitions. [2020-10-14 09:11:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:11:24,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-14 09:11:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:25,784 INFO L225 Difference]: With dead ends: 667931 [2020-10-14 09:11:25,785 INFO L226 Difference]: Without dead ends: 558105 [2020-10-14 09:11:25,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:11:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558105 states.