/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:58:54,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:58:54,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:58:54,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:58:54,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:58:54,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:58:54,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:58:54,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:58:54,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:58:54,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:58:54,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:58:54,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:58:54,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:58:54,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:58:54,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:58:54,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:58:54,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:58:54,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:58:54,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:58:54,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:58:54,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:58:54,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:58:54,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:58:54,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:58:54,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:58:54,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:58:54,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:58:54,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:58:54,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:58:54,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:58:54,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:58:54,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:58:54,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:58:54,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:58:54,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:58:54,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:58:54,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:58:54,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:58:54,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:58:54,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:58:54,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:58:54,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:58:55,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:58:55,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:58:55,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:58:55,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:58:55,012 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:58:55,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:58:55,013 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:58:55,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:58:55,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:58:55,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:58:55,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:58:55,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:58:55,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:58:55,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:58:55,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:58:55,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:58:55,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:58:55,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:58:55,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:58:55,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:58:55,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:58:55,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:58:55,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:58:55,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:58:55,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:58:55,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:58:55,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:58:55,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:58:55,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:58:55,017 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=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:58:55,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:58:55,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:58:55,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:58:55,379 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:58:55,380 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:58:55,381 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 19:58:55,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54526ee4c/f70fef5805fa49a2a149dd8599e06800/FLAG0dabe4340 [2020-10-12 19:58:55,997 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:58:55,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 19:58:56,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54526ee4c/f70fef5805fa49a2a149dd8599e06800/FLAG0dabe4340 [2020-10-12 19:58:56,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54526ee4c/f70fef5805fa49a2a149dd8599e06800 [2020-10-12 19:58:56,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:58:56,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:58:56,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:58:56,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:58:56,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:58:56,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:58:56" (1/1) ... [2020-10-12 19:58:56,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35de7d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:56, skipping insertion in model container [2020-10-12 19:58:56,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:58:56" (1/1) ... [2020-10-12 19:58:56,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:58:56,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:58:56,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:58:56,899 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:58:57,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:58:57,034 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:58:57,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57 WrapperNode [2020-10-12 19:58:57,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:58:57,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:58:57,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:58:57,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:58:57,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... [2020-10-12 19:58:57,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... [2020-10-12 19:58:57,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... [2020-10-12 19:58:57,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... [2020-10-12 19:58:57,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... [2020-10-12 19:58:57,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... [2020-10-12 19:58:57,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... [2020-10-12 19:58:57,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:58:57,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:58:57,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:58:57,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:58:57,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:58:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:58:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:58:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:58:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:58:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:58:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:58:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:58:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:58:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:58:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:58:57,179 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:58:57,179 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:58:57,179 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:58:57,179 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:58:57,179 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:58:57,179 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:58:57,180 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:58:57,180 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:58:57,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:58:57,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:58:57,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:58:58,098 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:58:58,098 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:58:58,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:58:58 BoogieIcfgContainer [2020-10-12 19:58:58,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:58:58,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:58:58,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:58:58,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:58:58,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:58:56" (1/3) ... [2020-10-12 19:58:58,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e26abbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:58:58, skipping insertion in model container [2020-10-12 19:58:58,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:58:57" (2/3) ... [2020-10-12 19:58:58,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e26abbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:58:58, skipping insertion in model container [2020-10-12 19:58:58,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:58:58" (3/3) ... [2020-10-12 19:58:58,122 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 19:58:58,134 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:58:58,148 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:58:58,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:58:58,199 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:58:58,200 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:58:58,200 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:58:58,200 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:58:58,200 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:58:58,201 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:58:58,201 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:58:58,201 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:58:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states. [2020-10-12 19:58:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:58:58,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:58:58,240 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] [2020-10-12 19:58:58,240 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:58:58,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:58:58,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1299417404, now seen corresponding path program 1 times [2020-10-12 19:58:58,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:58:58,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675961371] [2020-10-12 19:58:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:58:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:59,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:59,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:00,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:00,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:59:00,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:59:00,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-12 19:59:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:59:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:59:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:59:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:59:00,959 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:00,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:01,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:01,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:01,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:01,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 19:59:01,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:01,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:01,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:01,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:01,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:01,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675961371] [2020-10-12 19:59:01,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:01,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:59:01,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541090001] [2020-10-12 19:59:01,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:59:01,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:01,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:59:01,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:01,073 INFO L87 Difference]: Start difference. First operand 185 states. Second operand 7 states. [2020-10-12 19:59:01,368 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 19:59:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:02,335 INFO L93 Difference]: Finished difference Result 650 states and 1046 transitions. [2020-10-12 19:59:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 19:59:02,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:59:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:02,357 INFO L225 Difference]: With dead ends: 650 [2020-10-12 19:59:02,357 INFO L226 Difference]: Without dead ends: 545 [2020-10-12 19:59:02,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-12 19:59:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 279. [2020-10-12 19:59:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-12 19:59:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 416 transitions. [2020-10-12 19:59:02,450 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 416 transitions. Word has length 69 [2020-10-12 19:59:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:02,453 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 416 transitions. [2020-10-12 19:59:02,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:59:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 416 transitions. [2020-10-12 19:59:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:59:02,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:02,459 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] [2020-10-12 19:59:02,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:59:02,460 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1350115301, now seen corresponding path program 1 times [2020-10-12 19:59:02,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:02,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259094598] [2020-10-12 19:59:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:02,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:03,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:03,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:59:03,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:59:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-12 19:59:03,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:59:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:59:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 19:59:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:03,589 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:03,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:03,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:03,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:03,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:03,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:03,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:59:03,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:03,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:03,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259094598] [2020-10-12 19:59:03,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:03,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:59:03,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215500148] [2020-10-12 19:59:03,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:59:03,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:59:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:03,662 INFO L87 Difference]: Start difference. First operand 279 states and 416 transitions. Second operand 7 states. [2020-10-12 19:59:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:04,523 INFO L93 Difference]: Finished difference Result 1017 states and 1560 transitions. [2020-10-12 19:59:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:59:04,524 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-12 19:59:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:04,529 INFO L225 Difference]: With dead ends: 1017 [2020-10-12 19:59:04,530 INFO L226 Difference]: Without dead ends: 805 [2020-10-12 19:59:04,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2020-10-12 19:59:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 799. [2020-10-12 19:59:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2020-10-12 19:59:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1215 transitions. [2020-10-12 19:59:04,608 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1215 transitions. Word has length 70 [2020-10-12 19:59:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:04,609 INFO L479 AbstractCegarLoop]: Abstraction has 799 states and 1215 transitions. [2020-10-12 19:59:04,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:59:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1215 transitions. [2020-10-12 19:59:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:59:04,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:04,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:59:04,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:59:04,614 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1026057547, now seen corresponding path program 1 times [2020-10-12 19:59:04,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:04,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954667218] [2020-10-12 19:59:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:04,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:04,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:05,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:05,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:59:05,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:59:05,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-12 19:59:05,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:05,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:59:05,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:05,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:59:05,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:05,442 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:05,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:05,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:05,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:05,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:05,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 19:59:05,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:05,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:05,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954667218] [2020-10-12 19:59:05,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:05,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:59:05,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646932782] [2020-10-12 19:59:05,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:59:05,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:59:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:59:05,496 INFO L87 Difference]: Start difference. First operand 799 states and 1215 transitions. Second operand 6 states. [2020-10-12 19:59:05,673 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:59:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:06,444 INFO L93 Difference]: Finished difference Result 2015 states and 3107 transitions. [2020-10-12 19:59:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:59:06,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 19:59:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:06,456 INFO L225 Difference]: With dead ends: 2015 [2020-10-12 19:59:06,457 INFO L226 Difference]: Without dead ends: 1321 [2020-10-12 19:59:06,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:59:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2020-10-12 19:59:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1319. [2020-10-12 19:59:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2020-10-12 19:59:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 2015 transitions. [2020-10-12 19:59:06,577 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 2015 transitions. Word has length 71 [2020-10-12 19:59:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:06,577 INFO L479 AbstractCegarLoop]: Abstraction has 1319 states and 2015 transitions. [2020-10-12 19:59:06,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:59:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 2015 transitions. [2020-10-12 19:59:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:59:06,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:06,587 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] [2020-10-12 19:59:06,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:59:06,587 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:06,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash -679908380, now seen corresponding path program 1 times [2020-10-12 19:59:06,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:06,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052321541] [2020-10-12 19:59:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:06,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:06,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:07,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:07,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:59:07,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:59:07,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-12 19:59:07,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:59:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:07,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:59:07,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:07,475 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:07,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:07,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:07,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:07,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:07,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:07,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:59:07,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:07,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:07,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052321541] [2020-10-12 19:59:07,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:07,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:59:07,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420500630] [2020-10-12 19:59:07,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:59:07,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:59:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:59:07,526 INFO L87 Difference]: Start difference. First operand 1319 states and 2015 transitions. Second operand 6 states. [2020-10-12 19:59:07,671 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:59:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:08,693 INFO L93 Difference]: Finished difference Result 3626 states and 5578 transitions. [2020-10-12 19:59:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:59:08,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 19:59:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:08,711 INFO L225 Difference]: With dead ends: 3626 [2020-10-12 19:59:08,712 INFO L226 Difference]: Without dead ends: 2385 [2020-10-12 19:59:08,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:59:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2020-10-12 19:59:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2383. [2020-10-12 19:59:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2383 states. [2020-10-12 19:59:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 3637 transitions. [2020-10-12 19:59:08,933 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 3637 transitions. Word has length 71 [2020-10-12 19:59:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:08,934 INFO L479 AbstractCegarLoop]: Abstraction has 2383 states and 3637 transitions. [2020-10-12 19:59:08,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:59:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 3637 transitions. [2020-10-12 19:59:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:59:08,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:08,936 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] [2020-10-12 19:59:08,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:59:08,937 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash -474937069, now seen corresponding path program 1 times [2020-10-12 19:59:08,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:08,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608787733] [2020-10-12 19:59:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:08,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:09,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:09,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:59:09,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:59:09,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-12 19:59:09,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:59:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:59:09,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:09,685 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:09,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:09,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:09,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:09,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:09,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 19:59:09,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:09,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:09,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:09,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:09,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:09,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608787733] [2020-10-12 19:59:09,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:09,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:59:09,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281918390] [2020-10-12 19:59:09,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:59:09,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:09,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:59:09,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:59:09,768 INFO L87 Difference]: Start difference. First operand 2383 states and 3637 transitions. Second operand 6 states. [2020-10-12 19:59:09,971 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:59:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:11,253 INFO L93 Difference]: Finished difference Result 6853 states and 10489 transitions. [2020-10-12 19:59:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:59:11,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 19:59:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:11,286 INFO L225 Difference]: With dead ends: 6853 [2020-10-12 19:59:11,286 INFO L226 Difference]: Without dead ends: 4525 [2020-10-12 19:59:11,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:59:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2020-10-12 19:59:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 4523. [2020-10-12 19:59:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4523 states. [2020-10-12 19:59:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 6866 transitions. [2020-10-12 19:59:11,721 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 6866 transitions. Word has length 71 [2020-10-12 19:59:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:11,721 INFO L479 AbstractCegarLoop]: Abstraction has 4523 states and 6866 transitions. [2020-10-12 19:59:11,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:59:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 6866 transitions. [2020-10-12 19:59:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:59:11,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:11,724 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] [2020-10-12 19:59:11,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:59:11,725 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1749987906, now seen corresponding path program 1 times [2020-10-12 19:59:11,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:11,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586692355] [2020-10-12 19:59:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:11,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:11,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:12,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:12,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:59:12,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:59:12,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-12 19:59:12,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:59:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:59:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:12,577 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:12,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:12,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:12,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:12,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:12,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:12,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 19:59:12,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:12,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:12,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586692355] [2020-10-12 19:59:12,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:12,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:59:12,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935254922] [2020-10-12 19:59:12,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:59:12,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:12,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:59:12,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:59:12,635 INFO L87 Difference]: Start difference. First operand 4523 states and 6866 transitions. Second operand 6 states. [2020-10-12 19:59:12,785 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:59:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:14,411 INFO L93 Difference]: Finished difference Result 13174 states and 20006 transitions. [2020-10-12 19:59:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:59:14,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 19:59:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:14,462 INFO L225 Difference]: With dead ends: 13174 [2020-10-12 19:59:14,462 INFO L226 Difference]: Without dead ends: 8690 [2020-10-12 19:59:14,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:59:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8690 states. [2020-10-12 19:59:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8690 to 8688. [2020-10-12 19:59:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8688 states. [2020-10-12 19:59:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8688 states to 8688 states and 13068 transitions. [2020-10-12 19:59:15,124 INFO L78 Accepts]: Start accepts. Automaton has 8688 states and 13068 transitions. Word has length 71 [2020-10-12 19:59:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:15,125 INFO L479 AbstractCegarLoop]: Abstraction has 8688 states and 13068 transitions. [2020-10-12 19:59:15,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:59:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 8688 states and 13068 transitions. [2020-10-12 19:59:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:59:15,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:15,131 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] [2020-10-12 19:59:15,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:59:15,131 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:15,132 INFO L82 PathProgramCache]: Analyzing trace with hash -393483888, now seen corresponding path program 1 times [2020-10-12 19:59:15,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:15,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143978678] [2020-10-12 19:59:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:15,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:15,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:15,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:17,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:17,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:59:17,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:59:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-10-12 19:59:17,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:17,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:59:17,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:17,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:59:17,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:17,983 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:17,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:17,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:18,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:18,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:18,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:18,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 19:59:18,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:18,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:18,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:18,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:18,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:18,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143978678] [2020-10-12 19:59:18,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:18,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:59:18,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638583378] [2020-10-12 19:59:18,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:59:18,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:59:18,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:18,069 INFO L87 Difference]: Start difference. First operand 8688 states and 13068 transitions. Second operand 11 states. [2020-10-12 19:59:18,363 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 19:59:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:23,095 INFO L93 Difference]: Finished difference Result 30813 states and 46252 transitions. [2020-10-12 19:59:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:59:23,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 19:59:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:23,302 INFO L225 Difference]: With dead ends: 30813 [2020-10-12 19:59:23,302 INFO L226 Difference]: Without dead ends: 28474 [2020-10-12 19:59:23,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:59:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28474 states. [2020-10-12 19:59:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28474 to 8662. [2020-10-12 19:59:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8662 states. [2020-10-12 19:59:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8662 states to 8662 states and 13027 transitions. [2020-10-12 19:59:24,153 INFO L78 Accepts]: Start accepts. Automaton has 8662 states and 13027 transitions. Word has length 72 [2020-10-12 19:59:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:24,154 INFO L479 AbstractCegarLoop]: Abstraction has 8662 states and 13027 transitions. [2020-10-12 19:59:24,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:59:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 8662 states and 13027 transitions. [2020-10-12 19:59:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:59:24,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:24,158 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] [2020-10-12 19:59:24,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:59:24,158 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:24,159 INFO L82 PathProgramCache]: Analyzing trace with hash -924827152, now seen corresponding path program 1 times [2020-10-12 19:59:24,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:24,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082102403] [2020-10-12 19:59:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:24,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:25,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:25,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:59:25,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:59:25,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-12 19:59:25,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:59:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 19:59:25,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:26,075 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:26,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:26,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:26,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:26,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:26,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:26,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 19:59:26,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:26,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:26,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:26,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:26,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082102403] [2020-10-12 19:59:26,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:26,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:59:26,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889420132] [2020-10-12 19:59:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:59:26,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:59:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:26,163 INFO L87 Difference]: Start difference. First operand 8662 states and 13027 transitions. Second operand 11 states. [2020-10-12 19:59:26,407 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:59:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:29,971 INFO L93 Difference]: Finished difference Result 23851 states and 35903 transitions. [2020-10-12 19:59:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:59:29,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 19:59:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:30,024 INFO L225 Difference]: With dead ends: 23851 [2020-10-12 19:59:30,024 INFO L226 Difference]: Without dead ends: 19485 [2020-10-12 19:59:30,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:59:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19485 states. [2020-10-12 19:59:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19485 to 8824. [2020-10-12 19:59:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8824 states. [2020-10-12 19:59:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 13239 transitions. [2020-10-12 19:59:31,287 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 13239 transitions. Word has length 72 [2020-10-12 19:59:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:31,288 INFO L479 AbstractCegarLoop]: Abstraction has 8824 states and 13239 transitions. [2020-10-12 19:59:31,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:59:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 13239 transitions. [2020-10-12 19:59:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:59:31,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:31,292 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] [2020-10-12 19:59:31,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:59:31,292 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -963585456, now seen corresponding path program 1 times [2020-10-12 19:59:31,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:31,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17267790] [2020-10-12 19:59:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:31,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:31,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:31,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:33,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:33,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:59:33,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:59:33,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-10-12 19:59:33,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:59:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 19:59:33,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:33,425 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:33,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:33,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:33,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:33,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:33,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:33,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:59:33,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:33,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17267790] [2020-10-12 19:59:33,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:33,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:59:33,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464632895] [2020-10-12 19:59:33,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:59:33,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:33,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:59:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:33,502 INFO L87 Difference]: Start difference. First operand 8824 states and 13239 transitions. Second operand 11 states. [2020-10-12 19:59:33,779 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 19:59:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:38,541 INFO L93 Difference]: Finished difference Result 41877 states and 62779 transitions. [2020-10-12 19:59:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:59:38,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 19:59:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:38,628 INFO L225 Difference]: With dead ends: 41877 [2020-10-12 19:59:38,628 INFO L226 Difference]: Without dead ends: 35482 [2020-10-12 19:59:38,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2020-10-12 19:59:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35482 states. [2020-10-12 19:59:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35482 to 8997. [2020-10-12 19:59:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8997 states. [2020-10-12 19:59:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8997 states to 8997 states and 13458 transitions. [2020-10-12 19:59:39,836 INFO L78 Accepts]: Start accepts. Automaton has 8997 states and 13458 transitions. Word has length 72 [2020-10-12 19:59:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:39,836 INFO L479 AbstractCegarLoop]: Abstraction has 8997 states and 13458 transitions. [2020-10-12 19:59:39,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:59:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 8997 states and 13458 transitions. [2020-10-12 19:59:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:59:39,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:39,841 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] [2020-10-12 19:59:39,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:59:39,841 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1816507056, now seen corresponding path program 1 times [2020-10-12 19:59:39,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:39,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808689068] [2020-10-12 19:59:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:39,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:39,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:41,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:41,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:59:41,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:59:41,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1486 [2020-10-12 19:59:41,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:59:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:59:41,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:41,602 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:41,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:41,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:41,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:41,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:41,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:59:41,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:41,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:41,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:41,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:41,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:41,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808689068] [2020-10-12 19:59:41,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:41,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:59:41,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123961517] [2020-10-12 19:59:41,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:59:41,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:59:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:41,657 INFO L87 Difference]: Start difference. First operand 8997 states and 13458 transitions. Second operand 11 states. [2020-10-12 19:59:41,844 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 19:59:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:49,463 INFO L93 Difference]: Finished difference Result 61654 states and 92779 transitions. [2020-10-12 19:59:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 19:59:49,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 19:59:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:49,545 INFO L225 Difference]: With dead ends: 61654 [2020-10-12 19:59:49,545 INFO L226 Difference]: Without dead ends: 53397 [2020-10-12 19:59:49,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 19:59:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53397 states. [2020-10-12 19:59:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53397 to 9119. [2020-10-12 19:59:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9119 states. [2020-10-12 19:59:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9119 states to 9119 states and 13590 transitions. [2020-10-12 19:59:50,921 INFO L78 Accepts]: Start accepts. Automaton has 9119 states and 13590 transitions. Word has length 72 [2020-10-12 19:59:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:50,921 INFO L479 AbstractCegarLoop]: Abstraction has 9119 states and 13590 transitions. [2020-10-12 19:59:50,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:59:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 9119 states and 13590 transitions. [2020-10-12 19:59:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 19:59:50,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:50,926 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] [2020-10-12 19:59:50,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:59:50,926 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash 249417697, now seen corresponding path program 1 times [2020-10-12 19:59:50,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:50,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578329849] [2020-10-12 19:59:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:50,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:51,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:51,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 19:59:51,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:51,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-12 19:59:51,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:51,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:59:51,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 19:59:51,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:59:51,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:51,237 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:51,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:51,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:51,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:51,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:51,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:51,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:59:51,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:51,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578329849] [2020-10-12 19:59:51,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:51,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:59:51,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796710939] [2020-10-12 19:59:51,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:59:51,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:51,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:59:51,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:59:51,264 INFO L87 Difference]: Start difference. First operand 9119 states and 13590 transitions. Second operand 5 states. [2020-10-12 19:59:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:53,734 INFO L93 Difference]: Finished difference Result 17345 states and 25911 transitions. [2020-10-12 19:59:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:59:53,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-12 19:59:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:53,751 INFO L225 Difference]: With dead ends: 17345 [2020-10-12 19:59:53,751 INFO L226 Difference]: Without dead ends: 17343 [2020-10-12 19:59:53,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:59:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2020-10-12 19:59:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 9375. [2020-10-12 19:59:54,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9375 states. [2020-10-12 19:59:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9375 states to 9375 states and 13846 transitions. [2020-10-12 19:59:54,693 INFO L78 Accepts]: Start accepts. Automaton has 9375 states and 13846 transitions. Word has length 73 [2020-10-12 19:59:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:54,694 INFO L479 AbstractCegarLoop]: Abstraction has 9375 states and 13846 transitions. [2020-10-12 19:59:54,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:59:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 9375 states and 13846 transitions. [2020-10-12 19:59:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:59:54,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:54,698 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] [2020-10-12 19:59:54,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:59:54,698 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:54,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1893937802, now seen corresponding path program 1 times [2020-10-12 19:59:54,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:54,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415934592] [2020-10-12 19:59:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:54,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:54,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:55,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:56,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:56,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:59:56,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:59:56,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1714 [2020-10-12 19:59:56,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:56,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:59:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:59:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:59:56,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:56,656 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2020-10-12 19:59:56,822 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:56,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:56,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:56,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:56,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:56,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:59:56,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:56,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:56,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415934592] [2020-10-12 19:59:56,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:56,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:59:56,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172108771] [2020-10-12 19:59:56,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:59:56,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:56,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:59:56,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:59:56,889 INFO L87 Difference]: Start difference. First operand 9375 states and 13846 transitions. Second operand 10 states. [2020-10-12 19:59:57,082 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 19:59:57,501 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-12 19:59:57,705 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 19:59:57,848 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 19:59:58,015 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 20:00:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:03,176 INFO L93 Difference]: Finished difference Result 46088 states and 68761 transitions. [2020-10-12 20:00:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:00:03,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:00:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:03,218 INFO L225 Difference]: With dead ends: 46088 [2020-10-12 20:00:03,219 INFO L226 Difference]: Without dead ends: 37073 [2020-10-12 20:00:03,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-12 20:00:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37073 states. [2020-10-12 20:00:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37073 to 12001. [2020-10-12 20:00:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12001 states. [2020-10-12 20:00:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 17766 transitions. [2020-10-12 20:00:04,872 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 17766 transitions. Word has length 74 [2020-10-12 20:00:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:04,872 INFO L479 AbstractCegarLoop]: Abstraction has 12001 states and 17766 transitions. [2020-10-12 20:00:04,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:00:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 17766 transitions. [2020-10-12 20:00:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:00:04,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:04,876 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] [2020-10-12 20:00:04,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:00:04,876 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:04,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash -581438809, now seen corresponding path program 1 times [2020-10-12 20:00:04,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:04,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242156344] [2020-10-12 20:00:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:04,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:05,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-12 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:00:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:00:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 20:00:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:00:05,216 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:00:05,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:05,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:05,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:05,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:00:05,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:05,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:05,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242156344] [2020-10-12 20:00:05,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:00:05,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:00:05,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018690326] [2020-10-12 20:00:05,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:00:05,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:05,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:00:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:00:05,254 INFO L87 Difference]: Start difference. First operand 12001 states and 17766 transitions. Second operand 5 states. [2020-10-12 20:00:05,423 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 20:00:09,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:09,412 INFO L93 Difference]: Finished difference Result 32117 states and 47604 transitions. [2020-10-12 20:00:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:00:09,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-12 20:00:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:09,440 INFO L225 Difference]: With dead ends: 32117 [2020-10-12 20:00:09,440 INFO L226 Difference]: Without dead ends: 21155 [2020-10-12 20:00:09,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:00:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21155 states. [2020-10-12 20:00:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21155 to 21153. [2020-10-12 20:00:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21153 states. [2020-10-12 20:00:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21153 states to 21153 states and 31038 transitions. [2020-10-12 20:00:12,644 INFO L78 Accepts]: Start accepts. Automaton has 21153 states and 31038 transitions. Word has length 74 [2020-10-12 20:00:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:12,645 INFO L479 AbstractCegarLoop]: Abstraction has 21153 states and 31038 transitions. [2020-10-12 20:00:12,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:00:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 21153 states and 31038 transitions. [2020-10-12 20:00:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:00:12,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:12,649 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] [2020-10-12 20:00:12,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:00:12,649 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:12,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1148287064, now seen corresponding path program 1 times [2020-10-12 20:00:12,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:12,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470382335] [2020-10-12 20:00:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:12,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:12,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:14,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:14,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:00:14,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:00:14,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1731 [2020-10-12 20:00:14,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:00:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:00:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 20:00:14,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:14,818 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:00:14,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:14,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:14,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:14,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:14,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:14,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:00:14,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:14,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:00:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:14,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470382335] [2020-10-12 20:00:14,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:00:14,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:00:14,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357319755] [2020-10-12 20:00:14,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:00:14,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:00:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:00:14,874 INFO L87 Difference]: Start difference. First operand 21153 states and 31038 transitions. Second operand 10 states. [2020-10-12 20:00:15,031 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:00:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:25,964 INFO L93 Difference]: Finished difference Result 87552 states and 128945 transitions. [2020-10-12 20:00:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 20:00:25,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:00:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:26,052 INFO L225 Difference]: With dead ends: 87552 [2020-10-12 20:00:26,052 INFO L226 Difference]: Without dead ends: 66838 [2020-10-12 20:00:26,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-12 20:00:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66838 states. [2020-10-12 20:00:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66838 to 30864. [2020-10-12 20:00:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30864 states. [2020-10-12 20:00:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30864 states to 30864 states and 45311 transitions. [2020-10-12 20:00:31,681 INFO L78 Accepts]: Start accepts. Automaton has 30864 states and 45311 transitions. Word has length 74 [2020-10-12 20:00:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:31,681 INFO L479 AbstractCegarLoop]: Abstraction has 30864 states and 45311 transitions. [2020-10-12 20:00:31,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:00:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30864 states and 45311 transitions. [2020-10-12 20:00:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:00:31,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:31,685 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] [2020-10-12 20:00:31,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:00:31,685 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1532926198, now seen corresponding path program 1 times [2020-10-12 20:00:31,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:31,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425158792] [2020-10-12 20:00:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:32,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:32,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:00:32,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:00:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-12 20:00:32,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:00:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:00:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 20:00:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:33,389 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:00:33,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:33,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:33,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:33,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:33,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:33,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:00:33,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:33,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:33,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425158792] [2020-10-12 20:00:33,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:00:33,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:00:33,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102456321] [2020-10-12 20:00:33,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:00:33,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:33,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:00:33,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:00:33,430 INFO L87 Difference]: Start difference. First operand 30864 states and 45311 transitions. Second operand 10 states. [2020-10-12 20:00:33,609 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 20:01:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:06,298 INFO L93 Difference]: Finished difference Result 200332 states and 295539 transitions. [2020-10-12 20:01:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 20:01:06,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:01:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:06,584 INFO L225 Difference]: With dead ends: 200332 [2020-10-12 20:01:06,584 INFO L226 Difference]: Without dead ends: 192450 [2020-10-12 20:01:06,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-10-12 20:01:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192450 states. [2020-10-12 20:01:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192450 to 30925. [2020-10-12 20:01:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30925 states. [2020-10-12 20:01:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30925 states to 30925 states and 45413 transitions. [2020-10-12 20:01:14,531 INFO L78 Accepts]: Start accepts. Automaton has 30925 states and 45413 transitions. Word has length 74 [2020-10-12 20:01:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:14,531 INFO L479 AbstractCegarLoop]: Abstraction has 30925 states and 45413 transitions. [2020-10-12 20:01:14,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:01:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30925 states and 45413 transitions. [2020-10-12 20:01:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:01:14,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:14,534 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] [2020-10-12 20:01:14,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:01:14,534 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash -926563288, now seen corresponding path program 1 times [2020-10-12 20:01:14,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:14,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641752976] [2020-10-12 20:01:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:14,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:14,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:14,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:16,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:16,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:01:16,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:16,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1460 [2020-10-12 20:01:16,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:16,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:01:16,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:01:16,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 20:01:16,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:16,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:16,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:16,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:16,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:16,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:16,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:01:16,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:16,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:16,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641752976] [2020-10-12 20:01:16,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:16,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:01:16,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151448841] [2020-10-12 20:01:16,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:01:16,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:16,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:01:16,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:01:16,347 INFO L87 Difference]: Start difference. First operand 30925 states and 45413 transitions. Second operand 10 states. [2020-10-12 20:01:16,524 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 20:01:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:41,034 INFO L93 Difference]: Finished difference Result 139245 states and 205155 transitions. [2020-10-12 20:01:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:01:41,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:01:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:41,186 INFO L225 Difference]: With dead ends: 139245 [2020-10-12 20:01:41,186 INFO L226 Difference]: Without dead ends: 115001 [2020-10-12 20:01:41,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:01:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115001 states. [2020-10-12 20:01:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115001 to 44860. [2020-10-12 20:01:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44860 states. [2020-10-12 20:01:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44860 states to 44860 states and 65836 transitions. [2020-10-12 20:01:52,312 INFO L78 Accepts]: Start accepts. Automaton has 44860 states and 65836 transitions. Word has length 74 [2020-10-12 20:01:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:52,313 INFO L479 AbstractCegarLoop]: Abstraction has 44860 states and 65836 transitions. [2020-10-12 20:01:52,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:01:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 44860 states and 65836 transitions. [2020-10-12 20:01:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:01:52,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:52,316 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] [2020-10-12 20:01:52,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:01:52,316 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2019581273, now seen corresponding path program 1 times [2020-10-12 20:01:52,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:52,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769870930] [2020-10-12 20:01:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:52,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:52,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:52,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:55,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:55,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:01:55,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:01:55,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3587 [2020-10-12 20:01:55,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:01:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:01:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 20:01:55,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:56,440 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:56,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:56,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:56,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:56,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:56,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:01:56,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:56,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:56,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:56,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:56,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:56,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769870930] [2020-10-12 20:01:56,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:56,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 20:01:56,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560732801] [2020-10-12 20:01:56,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:01:56,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:56,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:01:56,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:01:56,476 INFO L87 Difference]: Start difference. First operand 44860 states and 65836 transitions. Second operand 12 states. [2020-10-12 20:01:56,651 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:02:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:18,352 INFO L93 Difference]: Finished difference Result 131289 states and 192006 transitions. [2020-10-12 20:02:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 20:02:18,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-10-12 20:02:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:18,453 INFO L225 Difference]: With dead ends: 131289 [2020-10-12 20:02:18,453 INFO L226 Difference]: Without dead ends: 87591 [2020-10-12 20:02:18,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-12 20:02:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87591 states. [2020-10-12 20:02:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87591 to 66640. [2020-10-12 20:02:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66640 states. [2020-10-12 20:02:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66640 states to 66640 states and 97744 transitions. [2020-10-12 20:02:34,479 INFO L78 Accepts]: Start accepts. Automaton has 66640 states and 97744 transitions. Word has length 75 [2020-10-12 20:02:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:34,479 INFO L479 AbstractCegarLoop]: Abstraction has 66640 states and 97744 transitions. [2020-10-12 20:02:34,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:02:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 66640 states and 97744 transitions. [2020-10-12 20:02:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:02:34,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:34,482 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] [2020-10-12 20:02:34,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 20:02:34,482 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash 226966619, now seen corresponding path program 1 times [2020-10-12 20:02:34,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:34,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188377892] [2020-10-12 20:02:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:34,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:34,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:34,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:35,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:35,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:02:35,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:02:35,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1186 [2020-10-12 20:02:35,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:35,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:02:35,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:35,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 20:02:35,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:35,932 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:02:35,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:35,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:35,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:35,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:35,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:35,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:02:35,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:35,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:35,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:35,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:35,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:35,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188377892] [2020-10-12 20:02:35,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:35,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:02:35,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978347947] [2020-10-12 20:02:35,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:02:35,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:02:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:02:35,989 INFO L87 Difference]: Start difference. First operand 66640 states and 97744 transitions. Second operand 8 states. [2020-10-12 20:02:36,151 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 134