/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:47:53,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:47:53,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:47:53,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:47:53,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:47:53,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:47:53,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:47:53,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:47:53,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:47:53,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:47:53,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:47:53,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:47:53,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:47:53,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:47:53,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:47:53,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:47:53,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:47:53,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:47:53,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:47:53,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:47:53,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:47:53,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:47:53,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:47:53,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:47:53,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:47:53,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:47:53,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:47:53,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:47:53,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:47:53,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:47:53,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:47:53,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:47:53,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:47:53,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:47:53,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:47:53,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:47:53,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:47:53,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:47:53,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:47:53,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:47:53,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:47:53,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:47:54,002 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:47:54,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:47:54,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:47:54,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:47:54,007 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:47:54,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:47:54,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:47:54,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:47:54,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:47:54,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:47:54,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:47:54,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:47:54,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:47:54,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:47:54,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:47:54,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:47:54,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:47:54,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:47:54,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:47:54,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:47:54,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:47:54,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:47:54,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:47:54,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:47:54,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:47:54,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:47:54,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:47:54,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:47:54,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:47:54,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:47:54,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:47:54,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:47:54,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:47:54,351 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:47:54,352 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:47:54,352 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:47:54,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dd300546/a597f94137544ee2b13e040ef3ea0d14/FLAG520e51e35 [2020-10-13 14:47:54,937 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:47:54,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:47:54,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dd300546/a597f94137544ee2b13e040ef3ea0d14/FLAG520e51e35 [2020-10-13 14:47:55,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dd300546/a597f94137544ee2b13e040ef3ea0d14 [2020-10-13 14:47:55,287 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:47:55,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:47:55,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:47:55,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:47:55,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:47:55,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:55,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db00863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55, skipping insertion in model container [2020-10-13 14:47:55,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:55,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:47:55,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:47:55,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:47:55,832 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:47:55,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:47:55,983 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:47:55,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55 WrapperNode [2020-10-13 14:47:55,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:47:55,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:47:55,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:47:55,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:47:55,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:55,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:56,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:56,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:56,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:56,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:56,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... [2020-10-13 14:47:56,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:47:56,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:47:56,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:47:56,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:47:56,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:47:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:47:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:47:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:47:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:47:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:47:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:47:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:47:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:47:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:47:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:47:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:47:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:47:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:47:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:47:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:47:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:47:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:47:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:47:56,136 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:47:56,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:47:56,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:47:56,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:47:57,034 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:47:57,035 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:47:57,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:47:57 BoogieIcfgContainer [2020-10-13 14:47:57,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:47:57,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:47:57,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:47:57,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:47:57,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:47:55" (1/3) ... [2020-10-13 14:47:57,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44facbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:47:57, skipping insertion in model container [2020-10-13 14:47:57,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:55" (2/3) ... [2020-10-13 14:47:57,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44facbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:47:57, skipping insertion in model container [2020-10-13 14:47:57,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:47:57" (3/3) ... [2020-10-13 14:47:57,048 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:47:57,059 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:47:57,066 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:47:57,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:47:57,104 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:47:57,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:47:57,105 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:47:57,105 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:47:57,105 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:47:57,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:47:57,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:47:57,106 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:47:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states. [2020-10-13 14:47:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:47:57,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:57,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:57,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 455647170, now seen corresponding path program 1 times [2020-10-13 14:47:57,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:57,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191040230] [2020-10-13 14:47:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:57,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:58,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:00,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:00,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:48:00,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:00,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-13 14:48:00,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 14:48:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:48:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:48:00,632 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:00,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:00,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:00,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:00,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:00,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:00,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:48:00,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:00,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:00,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191040230] [2020-10-13 14:48:00,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:00,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:48:00,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249774575] [2020-10-13 14:48:00,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:48:00,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:00,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:48:00,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:48:00,719 INFO L87 Difference]: Start difference. First operand 212 states. Second operand 4 states. [2020-10-13 14:48:00,976 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:48:02,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:02,028 INFO L93 Difference]: Finished difference Result 425 states and 696 transitions. [2020-10-13 14:48:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:48:02,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-13 14:48:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:02,046 INFO L225 Difference]: With dead ends: 425 [2020-10-13 14:48:02,046 INFO L226 Difference]: Without dead ends: 319 [2020-10-13 14:48:02,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:48:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-13 14:48:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 317. [2020-10-13 14:48:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-13 14:48:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 471 transitions. [2020-10-13 14:48:02,147 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 471 transitions. Word has length 84 [2020-10-13 14:48:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:02,149 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 471 transitions. [2020-10-13 14:48:02,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 471 transitions. [2020-10-13 14:48:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:48:02,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:02,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:02,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:48:02,161 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:02,164 INFO L82 PathProgramCache]: Analyzing trace with hash 980588779, now seen corresponding path program 1 times [2020-10-13 14:48:02,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:02,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969349556] [2020-10-13 14:48:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:02,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:03,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:03,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:48:03,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:03,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1353 [2020-10-13 14:48:03,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:48:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 14:48:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:48:03,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:03,903 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:03,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:03,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:03,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:03,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:03,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:03,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 14:48:03,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:03,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:03,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:03,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:03,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:04,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969349556] [2020-10-13 14:48:04,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:04,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:04,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407077150] [2020-10-13 14:48:04,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:48:04,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:48:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:48:04,015 INFO L87 Difference]: Start difference. First operand 317 states and 471 transitions. Second operand 5 states. [2020-10-13 14:48:05,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:05,271 INFO L93 Difference]: Finished difference Result 490 states and 743 transitions. [2020-10-13 14:48:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:48:05,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-13 14:48:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:05,275 INFO L225 Difference]: With dead ends: 490 [2020-10-13 14:48:05,276 INFO L226 Difference]: Without dead ends: 488 [2020-10-13 14:48:05,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-13 14:48:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 319. [2020-10-13 14:48:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-13 14:48:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 473 transitions. [2020-10-13 14:48:05,301 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 473 transitions. Word has length 85 [2020-10-13 14:48:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:05,302 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 473 transitions. [2020-10-13 14:48:05,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:48:05,302 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 473 transitions. [2020-10-13 14:48:05,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 14:48:05,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:05,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:05,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:48:05,304 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:05,305 INFO L82 PathProgramCache]: Analyzing trace with hash 591915382, now seen corresponding path program 1 times [2020-10-13 14:48:05,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:05,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538397109] [2020-10-13 14:48:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:05,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:05,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:06,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:06,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 14:48:06,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:06,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-13 14:48:06,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:48:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:48:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:48:06,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:06,597 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:06,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:06,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:06,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:06,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:06,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:06,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:48:06,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:06,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:06,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:06,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:06,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:06,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538397109] [2020-10-13 14:48:06,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:06,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:48:06,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684776945] [2020-10-13 14:48:06,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:48:06,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:06,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:48:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:48:06,672 INFO L87 Difference]: Start difference. First operand 319 states and 473 transitions. Second operand 8 states. [2020-10-13 14:48:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:09,210 INFO L93 Difference]: Finished difference Result 1375 states and 2111 transitions. [2020-10-13 14:48:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:48:09,210 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-13 14:48:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:09,217 INFO L225 Difference]: With dead ends: 1375 [2020-10-13 14:48:09,218 INFO L226 Difference]: Without dead ends: 1137 [2020-10-13 14:48:09,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:48:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2020-10-13 14:48:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1129. [2020-10-13 14:48:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1129 states. [2020-10-13 14:48:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1726 transitions. [2020-10-13 14:48:09,300 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1726 transitions. Word has length 86 [2020-10-13 14:48:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:09,301 INFO L479 AbstractCegarLoop]: Abstraction has 1129 states and 1726 transitions. [2020-10-13 14:48:09,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:48:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1726 transitions. [2020-10-13 14:48:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:48:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:09,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:09,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:48:09,304 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:09,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1778477157, now seen corresponding path program 1 times [2020-10-13 14:48:09,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:09,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945824683] [2020-10-13 14:48:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:09,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:09,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:09,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:09,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:48:09,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-13 14:48:09,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:48:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:48:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:48:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:10,238 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:10,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:10,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:10,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:10,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:10,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:48:10,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:48:10,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:10,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945824683] [2020-10-13 14:48:10,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:10,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:10,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830683474] [2020-10-13 14:48:10,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:48:10,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:10,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:48:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:10,293 INFO L87 Difference]: Start difference. First operand 1129 states and 1726 transitions. Second operand 6 states. [2020-10-13 14:48:10,558 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 14:48:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:11,986 INFO L93 Difference]: Finished difference Result 2982 states and 4607 transitions. [2020-10-13 14:48:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:48:11,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:48:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:11,999 INFO L225 Difference]: With dead ends: 2982 [2020-10-13 14:48:11,999 INFO L226 Difference]: Without dead ends: 1935 [2020-10-13 14:48:12,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:48:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-10-13 14:48:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1933. [2020-10-13 14:48:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2020-10-13 14:48:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2963 transitions. [2020-10-13 14:48:12,167 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2963 transitions. Word has length 87 [2020-10-13 14:48:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:12,168 INFO L479 AbstractCegarLoop]: Abstraction has 1933 states and 2963 transitions. [2020-10-13 14:48:12,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:48:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2963 transitions. [2020-10-13 14:48:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:48:12,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:12,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:12,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:48:12,172 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash -522669388, now seen corresponding path program 1 times [2020-10-13 14:48:12,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:12,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001887025] [2020-10-13 14:48:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:12,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:12,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:12,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:12,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:48:12,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-13 14:48:12,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:48:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:48:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:48:12,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:13,113 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:13,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:13,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:13,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:13,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:13,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:13,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 14:48:13,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:13,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:13,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:13,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:48:13,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:13,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001887025] [2020-10-13 14:48:13,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:13,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:13,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339558954] [2020-10-13 14:48:13,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:48:13,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:13,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:48:13,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:13,174 INFO L87 Difference]: Start difference. First operand 1933 states and 2963 transitions. Second operand 6 states. [2020-10-13 14:48:13,440 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:48:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:14,611 INFO L93 Difference]: Finished difference Result 5278 states and 8155 transitions. [2020-10-13 14:48:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:48:14,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:48:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:14,629 INFO L225 Difference]: With dead ends: 5278 [2020-10-13 14:48:14,629 INFO L226 Difference]: Without dead ends: 3457 [2020-10-13 14:48:14,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2020-10-13 14:48:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3455. [2020-10-13 14:48:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3455 states. [2020-10-13 14:48:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 5302 transitions. [2020-10-13 14:48:14,891 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 5302 transitions. Word has length 87 [2020-10-13 14:48:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:14,892 INFO L479 AbstractCegarLoop]: Abstraction has 3455 states and 5302 transitions. [2020-10-13 14:48:14,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:48:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 5302 transitions. [2020-10-13 14:48:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:48:14,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:14,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:14,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:48:14,896 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1216803075, now seen corresponding path program 1 times [2020-10-13 14:48:14,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:14,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525867417] [2020-10-13 14:48:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:14,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:15,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:15,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:15,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:48:15,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:15,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-13 14:48:15,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:48:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:48:15,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:48:15,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:15,740 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:15,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:15,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:15,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:15,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:15,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 14:48:15,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:48:15,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:15,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525867417] [2020-10-13 14:48:15,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:15,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:15,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850319717] [2020-10-13 14:48:15,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:48:15,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:15,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:48:15,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:15,803 INFO L87 Difference]: Start difference. First operand 3455 states and 5302 transitions. Second operand 6 states. [2020-10-13 14:48:16,012 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 14:48:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:17,385 INFO L93 Difference]: Finished difference Result 9738 states and 15023 transitions. [2020-10-13 14:48:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:48:17,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:48:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:17,419 INFO L225 Difference]: With dead ends: 9738 [2020-10-13 14:48:17,419 INFO L226 Difference]: Without dead ends: 6429 [2020-10-13 14:48:17,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6429 states. [2020-10-13 14:48:17,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6429 to 6427. [2020-10-13 14:48:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6427 states. [2020-10-13 14:48:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 9857 transitions. [2020-10-13 14:48:17,913 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 9857 transitions. Word has length 87 [2020-10-13 14:48:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:17,914 INFO L479 AbstractCegarLoop]: Abstraction has 6427 states and 9857 transitions. [2020-10-13 14:48:17,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:48:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 9857 transitions. [2020-10-13 14:48:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:48:17,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:17,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:17,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:48:17,919 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash 45666838, now seen corresponding path program 1 times [2020-10-13 14:48:17,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:17,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884597441] [2020-10-13 14:48:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:18,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:18,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:18,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:48:18,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:18,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-13 14:48:18,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:48:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:48:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:48:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:18,676 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:18,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:18,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:18,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:18,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:18,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:18,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:48:18,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:48:18,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:18,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884597441] [2020-10-13 14:48:18,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:18,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:18,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953488608] [2020-10-13 14:48:18,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:48:18,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:18,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:48:18,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:18,727 INFO L87 Difference]: Start difference. First operand 6427 states and 9857 transitions. Second operand 6 states. [2020-10-13 14:48:18,944 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:48:20,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:20,600 INFO L93 Difference]: Finished difference Result 18933 states and 29115 transitions. [2020-10-13 14:48:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:48:20,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:48:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:20,675 INFO L225 Difference]: With dead ends: 18933 [2020-10-13 14:48:20,675 INFO L226 Difference]: Without dead ends: 12565 [2020-10-13 14:48:20,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12565 states. [2020-10-13 14:48:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12565 to 12563. [2020-10-13 14:48:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12563 states. [2020-10-13 14:48:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12563 states to 12563 states and 19194 transitions. [2020-10-13 14:48:21,560 INFO L78 Accepts]: Start accepts. Automaton has 12563 states and 19194 transitions. Word has length 87 [2020-10-13 14:48:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:21,560 INFO L479 AbstractCegarLoop]: Abstraction has 12563 states and 19194 transitions. [2020-10-13 14:48:21,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:48:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 12563 states and 19194 transitions. [2020-10-13 14:48:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:48:21,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:21,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:21,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:48:21,567 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash -210834660, now seen corresponding path program 1 times [2020-10-13 14:48:21,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:21,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515228184] [2020-10-13 14:48:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:21,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:21,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:22,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:22,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:48:22,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:22,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-13 14:48:22,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:22,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:48:22,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:48:22,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:48:22,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:22,328 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:22,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:22,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:22,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:22,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:22,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 14:48:22,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:22,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:22,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:48:22,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:22,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515228184] [2020-10-13 14:48:22,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:22,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:22,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953475126] [2020-10-13 14:48:22,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:48:22,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:22,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:48:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:22,402 INFO L87 Difference]: Start difference. First operand 12563 states and 19194 transitions. Second operand 6 states. [2020-10-13 14:48:22,691 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:48:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:24,917 INFO L93 Difference]: Finished difference Result 35143 states and 53778 transitions. [2020-10-13 14:48:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:48:24,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-13 14:48:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:24,982 INFO L225 Difference]: With dead ends: 35143 [2020-10-13 14:48:24,982 INFO L226 Difference]: Without dead ends: 22648 [2020-10-13 14:48:25,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22648 states. [2020-10-13 14:48:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22648 to 22646. [2020-10-13 14:48:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22646 states. [2020-10-13 14:48:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22646 states to 22646 states and 34498 transitions. [2020-10-13 14:48:26,233 INFO L78 Accepts]: Start accepts. Automaton has 22646 states and 34498 transitions. Word has length 88 [2020-10-13 14:48:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:26,233 INFO L479 AbstractCegarLoop]: Abstraction has 22646 states and 34498 transitions. [2020-10-13 14:48:26,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:48:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22646 states and 34498 transitions. [2020-10-13 14:48:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:48:26,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:26,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:26,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:48:26,244 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:26,245 INFO L82 PathProgramCache]: Analyzing trace with hash -56203893, now seen corresponding path program 1 times [2020-10-13 14:48:26,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:26,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303070186] [2020-10-13 14:48:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:27,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:27,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:29,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:29,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:48:29,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:29,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2817 [2020-10-13 14:48:29,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:29,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 14:48:29,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:29,349 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-13 14:48:29,581 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:29,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:29,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:29,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:29,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:29,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:29,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:48:29,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:29,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:29,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:29,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303070186] [2020-10-13 14:48:29,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:29,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:48:29,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695763339] [2020-10-13 14:48:29,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:29,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:29,644 INFO L87 Difference]: Start difference. First operand 22646 states and 34498 transitions. Second operand 9 states. [2020-10-13 14:48:29,871 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:48:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:37,418 INFO L93 Difference]: Finished difference Result 127697 states and 194217 transitions. [2020-10-13 14:48:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:48:37,418 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:48:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:37,781 INFO L225 Difference]: With dead ends: 127697 [2020-10-13 14:48:37,782 INFO L226 Difference]: Without dead ends: 112354 [2020-10-13 14:48:37,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:48:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112354 states. [2020-10-13 14:48:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112354 to 22960. [2020-10-13 14:48:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22960 states. [2020-10-13 14:48:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22960 states to 22960 states and 34922 transitions. [2020-10-13 14:48:39,982 INFO L78 Accepts]: Start accepts. Automaton has 22960 states and 34922 transitions. Word has length 88 [2020-10-13 14:48:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:39,983 INFO L479 AbstractCegarLoop]: Abstraction has 22960 states and 34922 transitions. [2020-10-13 14:48:39,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:48:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22960 states and 34922 transitions. [2020-10-13 14:48:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:48:39,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:39,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:39,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:48:39,992 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:39,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1449586197, now seen corresponding path program 1 times [2020-10-13 14:48:39,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:39,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385310839] [2020-10-13 14:48:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:40,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:40,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:41,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:41,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:48:41,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:41,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-13 14:48:41,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:41,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 14:48:41,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:41,983 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:41,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:42,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:42,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:42,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:42,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:48:42,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:42,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:42,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:42,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:42,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:42,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385310839] [2020-10-13 14:48:42,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:42,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:48:42,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686758098] [2020-10-13 14:48:42,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:42,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:42,029 INFO L87 Difference]: Start difference. First operand 22960 states and 34922 transitions. Second operand 9 states. [2020-10-13 14:48:42,313 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:48:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:52,776 INFO L93 Difference]: Finished difference Result 102206 states and 154087 transitions. [2020-10-13 14:48:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:48:52,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:48:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:52,976 INFO L225 Difference]: With dead ends: 102206 [2020-10-13 14:48:52,976 INFO L226 Difference]: Without dead ends: 94188 [2020-10-13 14:48:53,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:48:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94188 states. [2020-10-13 14:48:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94188 to 23496. [2020-10-13 14:48:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23496 states. [2020-10-13 14:48:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 35693 transitions. [2020-10-13 14:48:55,309 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 35693 transitions. Word has length 88 [2020-10-13 14:48:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:55,309 INFO L479 AbstractCegarLoop]: Abstraction has 23496 states and 35693 transitions. [2020-10-13 14:48:55,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:48:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 35693 transitions. [2020-10-13 14:48:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:48:55,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:55,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:55,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:48:55,321 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:55,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1048542795, now seen corresponding path program 1 times [2020-10-13 14:48:55,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:55,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231294069] [2020-10-13 14:48:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:55,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:57,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:57,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:48:57,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-13 14:48:57,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:48:57,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:57,358 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:57,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:57,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:57,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:57,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:57,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:57,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:48:57,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:57,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:57,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:57,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231294069] [2020-10-13 14:48:57,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:57,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:48:57,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089911892] [2020-10-13 14:48:57,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:57,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:57,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:57,420 INFO L87 Difference]: Start difference. First operand 23496 states and 35693 transitions. Second operand 9 states. [2020-10-13 14:48:57,739 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:49:09,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:09,112 INFO L93 Difference]: Finished difference Result 104606 states and 158820 transitions. [2020-10-13 14:49:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:49:09,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:49:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:09,235 INFO L225 Difference]: With dead ends: 104606 [2020-10-13 14:49:09,236 INFO L226 Difference]: Without dead ends: 98835 [2020-10-13 14:49:09,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:49:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98835 states. [2020-10-13 14:49:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98835 to 23496. [2020-10-13 14:49:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23496 states. [2020-10-13 14:49:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 35689 transitions. [2020-10-13 14:49:11,884 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 35689 transitions. Word has length 88 [2020-10-13 14:49:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:11,884 INFO L479 AbstractCegarLoop]: Abstraction has 23496 states and 35689 transitions. [2020-10-13 14:49:11,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:49:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 35689 transitions. [2020-10-13 14:49:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:49:11,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:11,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:11,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:49:11,894 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash 33519915, now seen corresponding path program 1 times [2020-10-13 14:49:11,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:11,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625694414] [2020-10-13 14:49:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:11,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:11,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:12,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:13,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:13,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:49:13,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:13,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1735 [2020-10-13 14:49:13,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:49:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:49:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 14:49:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:14,057 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:14,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:14,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:14,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:14,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:14,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:49:14,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:14,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:14,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:14,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625694414] [2020-10-13 14:49:14,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:14,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:49:14,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778925404] [2020-10-13 14:49:14,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:49:14,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:14,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:49:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:49:14,118 INFO L87 Difference]: Start difference. First operand 23496 states and 35689 transitions. Second operand 9 states. [2020-10-13 14:49:14,447 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:49:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:30,187 INFO L93 Difference]: Finished difference Result 139597 states and 210693 transitions. [2020-10-13 14:49:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:49:30,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:49:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:30,340 INFO L225 Difference]: With dead ends: 139597 [2020-10-13 14:49:30,340 INFO L226 Difference]: Without dead ends: 121734 [2020-10-13 14:49:30,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:49:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121734 states. [2020-10-13 14:49:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121734 to 23913. [2020-10-13 14:49:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23913 states. [2020-10-13 14:49:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23913 states to 23913 states and 36228 transitions. [2020-10-13 14:49:33,785 INFO L78 Accepts]: Start accepts. Automaton has 23913 states and 36228 transitions. Word has length 88 [2020-10-13 14:49:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:33,786 INFO L479 AbstractCegarLoop]: Abstraction has 23913 states and 36228 transitions. [2020-10-13 14:49:33,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:49:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 23913 states and 36228 transitions. [2020-10-13 14:49:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:49:33,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:33,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:33,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:49:33,795 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1064600554, now seen corresponding path program 1 times [2020-10-13 14:49:33,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:33,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977938087] [2020-10-13 14:49:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:35,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:35,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:49:35,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:35,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-13 14:49:35,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:49:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:49:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 14:49:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:35,596 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:35,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:35,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:35,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:35,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:35,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:49:35,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:35,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:35,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977938087] [2020-10-13 14:49:35,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:35,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:49:35,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289566759] [2020-10-13 14:49:35,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:49:35,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:35,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:49:35,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:49:35,644 INFO L87 Difference]: Start difference. First operand 23913 states and 36228 transitions. Second operand 9 states. [2020-10-13 14:49:35,856 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:49:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:53,655 INFO L93 Difference]: Finished difference Result 133211 states and 201520 transitions. [2020-10-13 14:49:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:49:53,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-13 14:49:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:53,782 INFO L225 Difference]: With dead ends: 133211 [2020-10-13 14:49:53,782 INFO L226 Difference]: Without dead ends: 110758 [2020-10-13 14:49:53,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:49:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110758 states. [2020-10-13 14:49:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110758 to 24288. [2020-10-13 14:49:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24288 states. [2020-10-13 14:49:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24288 states to 24288 states and 36662 transitions. [2020-10-13 14:49:57,842 INFO L78 Accepts]: Start accepts. Automaton has 24288 states and 36662 transitions. Word has length 89 [2020-10-13 14:49:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:57,843 INFO L479 AbstractCegarLoop]: Abstraction has 24288 states and 36662 transitions. [2020-10-13 14:49:57,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:49:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24288 states and 36662 transitions. [2020-10-13 14:49:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:49:57,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:57,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:57,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:49:57,850 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1972449807, now seen corresponding path program 1 times [2020-10-13 14:49:57,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:57,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105038018] [2020-10-13 14:49:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:59,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:59,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:49:59,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:59,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-13 14:49:59,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:49:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:49:59,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:59,672 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:59,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:59,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:59,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:59,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:59,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:49:59,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:59,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:59,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105038018] [2020-10-13 14:49:59,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:59,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:59,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665143271] [2020-10-13 14:49:59,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:59,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:59,702 INFO L87 Difference]: Start difference. First operand 24288 states and 36662 transitions. Second operand 4 states. [2020-10-13 14:49:59,889 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:50:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:04,831 INFO L93 Difference]: Finished difference Result 39158 states and 59274 transitions. [2020-10-13 14:50:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:50:04,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:50:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:04,865 INFO L225 Difference]: With dead ends: 39158 [2020-10-13 14:50:04,866 INFO L226 Difference]: Without dead ends: 28504 [2020-10-13 14:50:04,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:50:04,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28504 states. [2020-10-13 14:50:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28504 to 28234. [2020-10-13 14:50:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28234 states. [2020-10-13 14:50:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28234 states to 28234 states and 42131 transitions. [2020-10-13 14:50:09,914 INFO L78 Accepts]: Start accepts. Automaton has 28234 states and 42131 transitions. Word has length 89 [2020-10-13 14:50:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:09,914 INFO L479 AbstractCegarLoop]: Abstraction has 28234 states and 42131 transitions. [2020-10-13 14:50:09,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:50:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 28234 states and 42131 transitions. [2020-10-13 14:50:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:50:09,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:09,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:50:09,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:50:09,922 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash -879267567, now seen corresponding path program 1 times [2020-10-13 14:50:09,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:09,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622537010] [2020-10-13 14:50:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:09,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:10,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:10,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:50:10,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:10,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 14:50:10,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:10,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:50:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:50:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 14:50:10,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:10,241 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:10,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:10,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:10,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:10,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:10,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:50:10,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:10,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:10,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:10,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:10,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622537010] [2020-10-13 14:50:10,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:10,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:10,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606321163] [2020-10-13 14:50:10,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:50:10,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:10,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:50:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:50:10,293 INFO L87 Difference]: Start difference. First operand 28234 states and 42131 transitions. Second operand 5 states. [2020-10-13 14:50:10,492 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 14:50:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:18,888 INFO L93 Difference]: Finished difference Result 76654 states and 114517 transitions. [2020-10-13 14:50:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:50:18,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-13 14:50:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:18,957 INFO L225 Difference]: With dead ends: 76654 [2020-10-13 14:50:18,957 INFO L226 Difference]: Without dead ends: 50812 [2020-10-13 14:50:18,986 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 [2020-10-13 14:50:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50812 states. [2020-10-13 14:50:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50812 to 50810. [2020-10-13 14:50:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50810 states. [2020-10-13 14:50:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50810 states to 50810 states and 75403 transitions. [2020-10-13 14:50:26,714 INFO L78 Accepts]: Start accepts. Automaton has 50810 states and 75403 transitions. Word has length 89 [2020-10-13 14:50:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:26,714 INFO L479 AbstractCegarLoop]: Abstraction has 50810 states and 75403 transitions. [2020-10-13 14:50:26,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:50:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 50810 states and 75403 transitions. [2020-10-13 14:50:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:50:26,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:26,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:50:26,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:50:26,722 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash -732364530, now seen corresponding path program 1 times [2020-10-13 14:50:26,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:26,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548541232] [2020-10-13 14:50:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:26,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:26,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:27,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:27,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:50:27,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:27,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-13 14:50:27,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:27,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:27,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 14:50:27,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:50:27,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:28,125 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:28,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:28,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:28,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:28,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:50:28,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:28,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548541232] [2020-10-13 14:50:28,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:28,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:50:28,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472485966] [2020-10-13 14:50:28,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:50:28,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:50:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:50:28,151 INFO L87 Difference]: Start difference. First operand 50810 states and 75403 transitions. Second operand 4 states. [2020-10-13 14:50:28,337 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:50:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:39,109 INFO L93 Difference]: Finished difference Result 74413 states and 110235 transitions. [2020-10-13 14:50:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:50:39,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:50:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:39,173 INFO L225 Difference]: With dead ends: 74413 [2020-10-13 14:50:39,173 INFO L226 Difference]: Without dead ends: 59455 [2020-10-13 14:50:39,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:50:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59455 states. [2020-10-13 14:50:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59455 to 54901. [2020-10-13 14:50:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54901 states. [2020-10-13 14:50:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54901 states to 54901 states and 80455 transitions. [2020-10-13 14:50:47,949 INFO L78 Accepts]: Start accepts. Automaton has 54901 states and 80455 transitions. Word has length 89 [2020-10-13 14:50:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:47,949 INFO L479 AbstractCegarLoop]: Abstraction has 54901 states and 80455 transitions. [2020-10-13 14:50:47,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:50:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 54901 states and 80455 transitions. [2020-10-13 14:50:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:50:47,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:47,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:50:47,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:50:47,957 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1559018351, now seen corresponding path program 1 times [2020-10-13 14:50:47,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:47,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080250489] [2020-10-13 14:50:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:47,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:48,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:48,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:50:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2234 [2020-10-13 14:50:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 14:50:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:50:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:50,399 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:50,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:50,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:50,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:50,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:50,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:50,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:50:50,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:50,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:50,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:50,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:50,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:50,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080250489] [2020-10-13 14:50:50,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:50,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:50:50,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641724277] [2020-10-13 14:50:50,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:50:50,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:50,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:50:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:50:50,425 INFO L87 Difference]: Start difference. First operand 54901 states and 80455 transitions. Second operand 4 states. [2020-10-13 14:50:50,636 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:51:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:05,073 INFO L93 Difference]: Finished difference Result 125737 states and 184531 transitions. [2020-10-13 14:51:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:51:05,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:51:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:05,161 INFO L225 Difference]: With dead ends: 125737 [2020-10-13 14:51:05,161 INFO L226 Difference]: Without dead ends: 76369 [2020-10-13 14:51:05,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:51:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76369 states. [2020-10-13 14:51:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76369 to 53989. [2020-10-13 14:51:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53989 states. [2020-10-13 14:51:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53989 states to 53989 states and 78324 transitions. [2020-10-13 14:51:15,413 INFO L78 Accepts]: Start accepts. Automaton has 53989 states and 78324 transitions. Word has length 89 [2020-10-13 14:51:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:15,414 INFO L479 AbstractCegarLoop]: Abstraction has 53989 states and 78324 transitions. [2020-10-13 14:51:15,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:51:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 53989 states and 78324 transitions. [2020-10-13 14:51:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:51:15,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:15,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:51:15,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:51:15,421 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1549965681, now seen corresponding path program 1 times [2020-10-13 14:51:15,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:15,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925772414] [2020-10-13 14:51:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:15,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:15,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:16,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1430 [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:51:16,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:17,055 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:51:17,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:17,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:17,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:17,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:17,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:51:17,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:17,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:51:17,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:17,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:51:17,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:51:17,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925772414] [2020-10-13 14:51:17,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:17,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:51:17,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052888270] [2020-10-13 14:51:17,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:51:17,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:51:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:51:17,077 INFO L87 Difference]: Start difference. First operand 53989 states and 78324 transitions. Second operand 4 states. [2020-10-13 14:51:17,258 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:51:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:35,602 INFO L93 Difference]: Finished difference Result 121524 states and 176730 transitions. [2020-10-13 14:51:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:51:35,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:51:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:35,699 INFO L225 Difference]: With dead ends: 121524 [2020-10-13 14:51:35,700 INFO L226 Difference]: Without dead ends: 81094 [2020-10-13 14:51:35,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:51:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81094 states.