/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.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:55:43,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:55:43,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:55:43,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:55:43,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:55:43,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:55:43,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:55:43,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:55:43,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:55:43,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:55:43,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:55:43,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:55:43,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:55:43,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:55:43,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:55:43,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:55:43,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:55:43,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:55:43,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:55:43,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:55:43,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:55:43,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:55:43,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:55:43,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:55:43,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:55:43,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:55:43,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:55:43,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:55:43,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:55:43,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:55:43,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:55:43,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:55:43,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:55:43,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:55:43,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:55:43,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:55:43,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:55:43,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:55:43,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:55:43,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:55:43,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:55:43,069 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 19:55:43,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:55:43,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:55:43,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:55:43,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:55:43,093 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:55:43,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:55:43,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:55:43,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:55:43,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:55:43,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:55:43,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:55:43,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:55:43,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:55:43,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:55:43,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:55:43,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:55:43,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:55:43,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:55:43,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:55:43,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:55:43,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:55:43,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:55:43,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:55:43,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:55:43,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:55:43,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:55:43,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:55:43,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:55:43,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:55:43,098 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 19:55:43,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:55:43,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:55:43,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:55:43,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:55:43,440 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:55:43,441 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:55:43,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53154f4b1/4754be1c8dfd41b588418bbd01fdfb27/FLAGe47ad154e [2020-10-12 19:55:43,962 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:55:43,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:55:43,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53154f4b1/4754be1c8dfd41b588418bbd01fdfb27/FLAGe47ad154e [2020-10-12 19:55:44,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53154f4b1/4754be1c8dfd41b588418bbd01fdfb27 [2020-10-12 19:55:44,335 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:55:44,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:55:44,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:55:44,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:55:44,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:55:44,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286d3891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44, skipping insertion in model container [2020-10-12 19:55:44,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:55:44,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:55:44,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:55:44,767 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:55:44,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:55:44,832 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:55:44,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44 WrapperNode [2020-10-12 19:55:44,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:55:44,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:55:44,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:55:44,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:55:44,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (1/1) ... [2020-10-12 19:55:44,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:55:44,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:55:44,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:55:44,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:55:44,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (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 19:55:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:55:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:55:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:55:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:55:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:55:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:55:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:55:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:55:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:55:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:55:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:55:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:55:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:55:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:55:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:55:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:55:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:55:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:55:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:55:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:55:45,537 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:55:45,537 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:55:45,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:55:45 BoogieIcfgContainer [2020-10-12 19:55:45,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:55:45,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:55:45,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:55:45,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:55:45,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:55:44" (1/3) ... [2020-10-12 19:55:45,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae1cb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:55:45, skipping insertion in model container [2020-10-12 19:55:45,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:44" (2/3) ... [2020-10-12 19:55:45,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae1cb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:55:45, skipping insertion in model container [2020-10-12 19:55:45,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:55:45" (3/3) ... [2020-10-12 19:55:45,552 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:55:45,563 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:55:45,575 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:55:45,589 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:55:45,621 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:55:45,622 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:55:45,622 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:55:45,622 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:55:45,623 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:55:45,624 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:55:45,624 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:55:45,624 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:55:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-10-12 19:55:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 19:55:45,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:45,666 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] [2020-10-12 19:55:45,668 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash 259136055, now seen corresponding path program 1 times [2020-10-12 19:55:45,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:45,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279030064] [2020-10-12 19:55:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:45,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:46,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:46,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:47,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:47,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 19:55:47,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:55:47,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1546 [2020-10-12 19:55:47,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:55:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:55:47,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:55:47,735 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:55:47,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:47,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:47,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:47,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:55:47,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:47,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:47,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:55:47,798 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 19:55:47,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279030064] [2020-10-12 19:55:47,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:47,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:47,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387443010] [2020-10-12 19:55:47,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:47,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:47,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:47,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:47,833 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 6 states. [2020-10-12 19:55:48,051 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:55:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:48,614 INFO L93 Difference]: Finished difference Result 354 states and 557 transitions. [2020-10-12 19:55:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:55:48,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-12 19:55:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:48,631 INFO L225 Difference]: With dead ends: 354 [2020-10-12 19:55:48,632 INFO L226 Difference]: Without dead ends: 272 [2020-10-12 19:55:48,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:55:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-12 19:55:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 146. [2020-10-12 19:55:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 19:55:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 217 transitions. [2020-10-12 19:55:48,701 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 217 transitions. Word has length 41 [2020-10-12 19:55:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:48,702 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 217 transitions. [2020-10-12 19:55:48,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:55:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 217 transitions. [2020-10-12 19:55:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:55:48,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:48,705 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] [2020-10-12 19:55:48,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:55:48,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -575249677, now seen corresponding path program 1 times [2020-10-12 19:55:48,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:48,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353035003] [2020-10-12 19:55:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:48,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:49,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:49,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:55:49,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:55:49,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-12 19:55:49,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:49,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:55:49,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:55:49,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:55:49,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:49,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:49,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:49,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:49,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:49,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:49,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:55:49,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:49,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:49,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:49,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:49,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:49,626 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 19:55:49,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353035003] [2020-10-12 19:55:49,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:49,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:55:49,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127782626] [2020-10-12 19:55:49,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:55:49,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:49,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:55:49,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:55:49,630 INFO L87 Difference]: Start difference. First operand 146 states and 217 transitions. Second operand 5 states. [2020-10-12 19:55:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:50,122 INFO L93 Difference]: Finished difference Result 272 states and 414 transitions. [2020-10-12 19:55:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:55:50,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-12 19:55:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:50,126 INFO L225 Difference]: With dead ends: 272 [2020-10-12 19:55:50,127 INFO L226 Difference]: Without dead ends: 270 [2020-10-12 19:55:50,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-12 19:55:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 150. [2020-10-12 19:55:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-12 19:55:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 221 transitions. [2020-10-12 19:55:50,148 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 221 transitions. Word has length 42 [2020-10-12 19:55:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:50,148 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 221 transitions. [2020-10-12 19:55:50,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:55:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 221 transitions. [2020-10-12 19:55:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:55:50,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:50,151 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] [2020-10-12 19:55:50,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:55:50,151 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:50,152 INFO L82 PathProgramCache]: Analyzing trace with hash -643251098, now seen corresponding path program 1 times [2020-10-12 19:55:50,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:50,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817954814] [2020-10-12 19:55:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:50,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:50,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:50,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:50,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:55:50,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:55:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-12 19:55:50,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:55:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:55:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 19:55:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:51,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:51,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:51,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:51,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:51,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:55:51,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:51,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:51,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:51,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:55:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:51,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817954814] [2020-10-12 19:55:51,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:51,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:55:51,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338864675] [2020-10-12 19:55:51,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:55:51,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:51,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:55:51,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:55:51,193 INFO L87 Difference]: Start difference. First operand 150 states and 221 transitions. Second operand 5 states. [2020-10-12 19:55:51,356 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-12 19:55:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:51,963 INFO L93 Difference]: Finished difference Result 510 states and 782 transitions. [2020-10-12 19:55:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:55:51,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-12 19:55:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:51,970 INFO L225 Difference]: With dead ends: 510 [2020-10-12 19:55:51,970 INFO L226 Difference]: Without dead ends: 384 [2020-10-12 19:55:51,974 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 19:55:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-12 19:55:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 380. [2020-10-12 19:55:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-12 19:55:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 579 transitions. [2020-10-12 19:55:52,042 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 579 transitions. Word has length 43 [2020-10-12 19:55:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:52,042 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 579 transitions. [2020-10-12 19:55:52,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:55:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 579 transitions. [2020-10-12 19:55:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:55:52,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:52,046 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] [2020-10-12 19:55:52,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:55:52,047 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash 507435555, now seen corresponding path program 1 times [2020-10-12 19:55:52,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:52,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232419892] [2020-10-12 19:55:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:52,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:52,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:52,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:52,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:54,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:55:54,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:54,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2397 [2020-10-12 19:55:54,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:55:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:55:54,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:54,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:54,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:54,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:54,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:55:54,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:54,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:54,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 19:55:54,706 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 19:55:54,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232419892] [2020-10-12 19:55:54,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:54,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:54,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883221168] [2020-10-12 19:55:54,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:55:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:55:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:55:54,710 INFO L87 Difference]: Start difference. First operand 380 states and 579 transitions. Second operand 7 states. [2020-10-12 19:55:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:55,418 INFO L93 Difference]: Finished difference Result 1022 states and 1579 transitions. [2020-10-12 19:55:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:55:55,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-12 19:55:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:55,431 INFO L225 Difference]: With dead ends: 1022 [2020-10-12 19:55:55,432 INFO L226 Difference]: Without dead ends: 781 [2020-10-12 19:55:55,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-10-12 19:55:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 383. [2020-10-12 19:55:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-12 19:55:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 583 transitions. [2020-10-12 19:55:55,498 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 583 transitions. Word has length 44 [2020-10-12 19:55:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:55,498 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 583 transitions. [2020-10-12 19:55:55,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:55:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 583 transitions. [2020-10-12 19:55:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:55:55,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:55,506 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] [2020-10-12 19:55:55,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:55:55,506 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:55,507 INFO L82 PathProgramCache]: Analyzing trace with hash -971015294, now seen corresponding path program 1 times [2020-10-12 19:55:55,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:55,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128968912] [2020-10-12 19:55:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:55,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:55,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:55,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:56,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:56,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:58,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:58,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:55:58,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:58,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2549 [2020-10-12 19:55:58,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:55:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 19:55:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:58,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:58,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:58,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:58,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:55:58,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:58,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:58,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:58,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:58,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:58,303 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 19:55:58,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128968912] [2020-10-12 19:55:58,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:58,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:58,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661399807] [2020-10-12 19:55:58,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:55:58,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:58,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:55:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:55:58,306 INFO L87 Difference]: Start difference. First operand 383 states and 583 transitions. Second operand 7 states. [2020-10-12 19:55:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:59,004 INFO L93 Difference]: Finished difference Result 1153 states and 1773 transitions. [2020-10-12 19:55:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:55:59,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-12 19:55:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:59,009 INFO L225 Difference]: With dead ends: 1153 [2020-10-12 19:55:59,009 INFO L226 Difference]: Without dead ends: 797 [2020-10-12 19:55:59,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2020-10-12 19:55:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 401. [2020-10-12 19:55:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-12 19:55:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 609 transitions. [2020-10-12 19:55:59,054 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 609 transitions. Word has length 44 [2020-10-12 19:55:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:59,054 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 609 transitions. [2020-10-12 19:55:59,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:55:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 609 transitions. [2020-10-12 19:55:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:55:59,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:59,056 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] [2020-10-12 19:55:59,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:55:59,057 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1457851125, now seen corresponding path program 1 times [2020-10-12 19:55:59,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:59,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057914685] [2020-10-12 19:55:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:59,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:59,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:59,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:59,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:01,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:01,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:56:01,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:56:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2184 [2020-10-12 19:56:01,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:56:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:01,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 19:56:01,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:01,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:01,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:01,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:01,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:01,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:56:01,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:01,531 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 19:56:01,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057914685] [2020-10-12 19:56:01,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:01,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:56:01,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102331627] [2020-10-12 19:56:01,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:56:01,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:56:01,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:56:01,537 INFO L87 Difference]: Start difference. First operand 401 states and 609 transitions. Second operand 7 states. [2020-10-12 19:56:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:02,177 INFO L93 Difference]: Finished difference Result 1075 states and 1643 transitions. [2020-10-12 19:56:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:56:02,178 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-12 19:56:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:02,185 INFO L225 Difference]: With dead ends: 1075 [2020-10-12 19:56:02,185 INFO L226 Difference]: Without dead ends: 719 [2020-10-12 19:56:02,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:56:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-10-12 19:56:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 431. [2020-10-12 19:56:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-12 19:56:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 653 transitions. [2020-10-12 19:56:02,239 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 653 transitions. Word has length 44 [2020-10-12 19:56:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:02,240 INFO L479 AbstractCegarLoop]: Abstraction has 431 states and 653 transitions. [2020-10-12 19:56:02,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:56:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 653 transitions. [2020-10-12 19:56:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 19:56:02,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:02,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:02,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:56:02,243 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:02,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1767724215, now seen corresponding path program 1 times [2020-10-12 19:56:02,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:02,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339283927] [2020-10-12 19:56:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:02,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:02,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:02,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:03,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:05,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:05,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 19:56:05,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:56:05,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3062 [2020-10-12 19:56:05,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:05,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:05,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:56:05,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:56:05,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:05,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:05,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:05,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:05,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:05,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:56:05,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:05,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:05,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339283927] [2020-10-12 19:56:05,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:05,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:56:05,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74465313] [2020-10-12 19:56:05,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:05,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:05,553 INFO L87 Difference]: Start difference. First operand 431 states and 653 transitions. Second operand 6 states. [2020-10-12 19:56:05,684 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 19:56:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:06,214 INFO L93 Difference]: Finished difference Result 681 states and 1041 transitions. [2020-10-12 19:56:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:56:06,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-12 19:56:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:06,219 INFO L225 Difference]: With dead ends: 681 [2020-10-12 19:56:06,219 INFO L226 Difference]: Without dead ends: 555 [2020-10-12 19:56:06,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-12 19:56:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 549. [2020-10-12 19:56:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-10-12 19:56:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 839 transitions. [2020-10-12 19:56:06,279 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 839 transitions. Word has length 60 [2020-10-12 19:56:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:06,280 INFO L479 AbstractCegarLoop]: Abstraction has 549 states and 839 transitions. [2020-10-12 19:56:06,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 839 transitions. [2020-10-12 19:56:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:56:06,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:06,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:06,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:56:06,282 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:06,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2061741070, now seen corresponding path program 1 times [2020-10-12 19:56:06,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:06,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624061694] [2020-10-12 19:56:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:06,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:06,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:06,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:07,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:10,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:11,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:11,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:56:11,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:56:11,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:56:11,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:56:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:11,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:11,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:11,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:11,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:11,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:56:11,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:11,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:11,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:11,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624061694] [2020-10-12 19:56:11,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:11,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:56:11,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384022583] [2020-10-12 19:56:11,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:11,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:11,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:11,554 INFO L87 Difference]: Start difference. First operand 549 states and 839 transitions. Second operand 8 states. [2020-10-12 19:56:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:12,256 INFO L93 Difference]: Finished difference Result 1825 states and 2781 transitions. [2020-10-12 19:56:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:12,256 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 19:56:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:12,263 INFO L225 Difference]: With dead ends: 1825 [2020-10-12 19:56:12,263 INFO L226 Difference]: Without dead ends: 1351 [2020-10-12 19:56:12,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2020-10-12 19:56:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 629. [2020-10-12 19:56:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2020-10-12 19:56:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 923 transitions. [2020-10-12 19:56:12,342 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 923 transitions. Word has length 61 [2020-10-12 19:56:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:12,343 INFO L479 AbstractCegarLoop]: Abstraction has 629 states and 923 transitions. [2020-10-12 19:56:12,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 923 transitions. [2020-10-12 19:56:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:56:12,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:12,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:12,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:56:12,345 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash 754775377, now seen corresponding path program 1 times [2020-10-12 19:56:12,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:12,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114814655] [2020-10-12 19:56:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:12,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:12,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:12,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:12,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:13,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:16,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:17,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:17,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:56:17,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:56:17,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:56:17,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:17,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:17,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:17,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:56:17,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:17,598 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:56:17,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:17,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:17,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:17,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:17,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:17,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:56:17,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:17,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:17,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:17,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:17,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:17,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114814655] [2020-10-12 19:56:17,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:17,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:56:17,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366949179] [2020-10-12 19:56:17,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:17,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:17,655 INFO L87 Difference]: Start difference. First operand 629 states and 923 transitions. Second operand 8 states. [2020-10-12 19:56:17,802 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-12 19:56:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:18,881 INFO L93 Difference]: Finished difference Result 3239 states and 4729 transitions. [2020-10-12 19:56:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:18,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 19:56:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:18,895 INFO L225 Difference]: With dead ends: 3239 [2020-10-12 19:56:18,895 INFO L226 Difference]: Without dead ends: 2662 [2020-10-12 19:56:18,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2020-10-12 19:56:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1264. [2020-10-12 19:56:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264 states. [2020-10-12 19:56:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1820 transitions. [2020-10-12 19:56:19,050 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1820 transitions. Word has length 61 [2020-10-12 19:56:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:19,051 INFO L479 AbstractCegarLoop]: Abstraction has 1264 states and 1820 transitions. [2020-10-12 19:56:19,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1820 transitions. [2020-10-12 19:56:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:56:19,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:19,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:19,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:56:19,053 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:19,054 INFO L82 PathProgramCache]: Analyzing trace with hash 267939546, now seen corresponding path program 1 times [2020-10-12 19:56:19,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:19,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757277837] [2020-10-12 19:56:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:19,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:21,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:24,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:24,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:56:24,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:56:24,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:56:24,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:24,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:24,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:24,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:56:24,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:24,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:24,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:24,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:24,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:24,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:24,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:56:24,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:24,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:24,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757277837] [2020-10-12 19:56:24,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:24,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:56:24,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401884011] [2020-10-12 19:56:24,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:24,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:24,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:24,346 INFO L87 Difference]: Start difference. First operand 1264 states and 1820 transitions. Second operand 8 states. [2020-10-12 19:56:24,485 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-12 19:56:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:25,675 INFO L93 Difference]: Finished difference Result 5716 states and 8114 transitions. [2020-10-12 19:56:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:25,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 19:56:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:25,699 INFO L225 Difference]: With dead ends: 5716 [2020-10-12 19:56:25,699 INFO L226 Difference]: Without dead ends: 4522 [2020-10-12 19:56:25,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2020-10-12 19:56:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 2490. [2020-10-12 19:56:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2490 states. [2020-10-12 19:56:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3513 transitions. [2020-10-12 19:56:26,068 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3513 transitions. Word has length 61 [2020-10-12 19:56:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:26,069 INFO L479 AbstractCegarLoop]: Abstraction has 2490 states and 3513 transitions. [2020-10-12 19:56:26,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3513 transitions. [2020-10-12 19:56:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:56:26,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:26,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:26,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:56:26,072 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:26,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1502935359, now seen corresponding path program 1 times [2020-10-12 19:56:26,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:26,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950684258] [2020-10-12 19:56:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:26,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:26,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:26,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:26,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:27,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:30,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:31,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:31,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:56:31,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:56:31,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:56:31,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:31,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:56:31,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:56:31,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:56:31,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:31,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:31,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:31,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:31,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:31,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:56:31,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:31,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950684258] [2020-10-12 19:56:31,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:31,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:56:31,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696151276] [2020-10-12 19:56:31,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:56:31,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:56:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:56:31,573 INFO L87 Difference]: Start difference. First operand 2490 states and 3513 transitions. Second operand 12 states. [2020-10-12 19:56:31,733 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:56:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:38,961 INFO L93 Difference]: Finished difference Result 32186 states and 45176 transitions. [2020-10-12 19:56:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 19:56:38,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-10-12 19:56:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:39,067 INFO L225 Difference]: With dead ends: 32186 [2020-10-12 19:56:39,067 INFO L226 Difference]: Without dead ends: 30920 [2020-10-12 19:56:39,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=796, Invalid=2986, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 19:56:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30920 states. [2020-10-12 19:56:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30920 to 5990. [2020-10-12 19:56:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5990 states. [2020-10-12 19:56:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 8533 transitions. [2020-10-12 19:56:40,208 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 8533 transitions. Word has length 64 [2020-10-12 19:56:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:40,208 INFO L479 AbstractCegarLoop]: Abstraction has 5990 states and 8533 transitions. [2020-10-12 19:56:40,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:56:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 8533 transitions. [2020-10-12 19:56:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:56:40,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:40,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:40,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:56:40,213 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:40,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2086625848, now seen corresponding path program 1 times [2020-10-12 19:56:40,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:40,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749990335] [2020-10-12 19:56:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:40,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:45,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:45,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:56:45,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:56:45,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:56:45,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:56:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:56:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:45,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:45,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:45,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:45,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:45,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:45,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:56:45,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:45,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:45,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:45,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:45,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:45,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749990335] [2020-10-12 19:56:45,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:45,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:56:45,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844909605] [2020-10-12 19:56:45,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:56:45,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:56:45,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:56:45,458 INFO L87 Difference]: Start difference. First operand 5990 states and 8533 transitions. Second operand 12 states. [2020-10-12 19:56:52,497 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-10-12 19:56:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:55,537 INFO L93 Difference]: Finished difference Result 73908 states and 104455 transitions. [2020-10-12 19:56:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 19:56:55,537 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-10-12 19:56:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:55,710 INFO L225 Difference]: With dead ends: 73908 [2020-10-12 19:56:55,710 INFO L226 Difference]: Without dead ends: 67942 [2020-10-12 19:56:55,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 19:56:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67942 states. [2020-10-12 19:57:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67942 to 45270. [2020-10-12 19:57:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45270 states. [2020-10-12 19:57:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45270 states to 45270 states and 64749 transitions. [2020-10-12 19:57:02,597 INFO L78 Accepts]: Start accepts. Automaton has 45270 states and 64749 transitions. Word has length 64 [2020-10-12 19:57:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:02,597 INFO L479 AbstractCegarLoop]: Abstraction has 45270 states and 64749 transitions. [2020-10-12 19:57:02,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:57:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 45270 states and 64749 transitions. [2020-10-12 19:57:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:57:02,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:02,604 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:02,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:57:02,604 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash -469120957, now seen corresponding path program 1 times [2020-10-12 19:57:02,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:02,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614075171] [2020-10-12 19:57:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:02,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:02,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:02,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:02,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:02,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:03,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:05,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:05,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:57:05,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:57:05,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2406 [2020-10-12 19:57:05,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:57:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:57:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:57:05,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:05,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:05,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:05,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:05,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:05,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:05,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:57:05,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:57:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:57:05,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:05,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614075171] [2020-10-12 19:57:05,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:57:05,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:57:05,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545149496] [2020-10-12 19:57:05,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:57:05,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:57:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:57:05,281 INFO L87 Difference]: Start difference. First operand 45270 states and 64749 transitions. Second operand 10 states. [2020-10-12 19:57:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:18,140 INFO L93 Difference]: Finished difference Result 106542 states and 151903 transitions. [2020-10-12 19:57:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:57:18,141 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-12 19:57:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:18,278 INFO L225 Difference]: With dead ends: 106542 [2020-10-12 19:57:18,278 INFO L226 Difference]: Without dead ends: 89840 [2020-10-12 19:57:18,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2020-10-12 19:57:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89840 states. [2020-10-12 19:57:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89840 to 56406. [2020-10-12 19:57:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56406 states. [2020-10-12 19:57:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56406 states to 56406 states and 80509 transitions. [2020-10-12 19:57:26,760 INFO L78 Accepts]: Start accepts. Automaton has 56406 states and 80509 transitions. Word has length 64 [2020-10-12 19:57:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:26,760 INFO L479 AbstractCegarLoop]: Abstraction has 56406 states and 80509 transitions. [2020-10-12 19:57:26,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:57:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 56406 states and 80509 transitions. [2020-10-12 19:57:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:57:26,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:26,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:26,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:57:26,766 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:26,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1811217186, now seen corresponding path program 1 times [2020-10-12 19:57:26,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:26,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100650076] [2020-10-12 19:57:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:26,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:26,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:26,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:26,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:27,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:27,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:29,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:29,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:57:29,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:57:29,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2277 [2020-10-12 19:57:29,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:29,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:57:29,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:57:29,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:57:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:29,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:29,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:29,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:29,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:29,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:29,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:57:29,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:57:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:29,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:57:29,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:29,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100650076] [2020-10-12 19:57:29,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:57:29,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:57:29,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322348780] [2020-10-12 19:57:29,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:57:29,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:57:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:57:29,333 INFO L87 Difference]: Start difference. First operand 56406 states and 80509 transitions. Second operand 10 states. [2020-10-12 19:58:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:58:59,900 INFO L93 Difference]: Finished difference Result 689150 states and 977043 transitions. [2020-10-12 19:58:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 19:58:59,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-12 19:58:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:00,802 INFO L225 Difference]: With dead ends: 689150 [2020-10-12 19:59:00,802 INFO L226 Difference]: Without dead ends: 632768 [2020-10-12 19:59:00,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-12 19:59:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632768 states.