/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 SingleStatement --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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:45:58,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:45:58,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:45:58,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:45:58,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:45:58,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:45:58,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:45:58,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:45:58,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:45:58,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:45:58,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:45:58,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:45:58,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:45:58,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:45:58,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:45:58,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:45:58,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:45:58,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:45:58,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:45:58,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:45:58,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:45:58,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:45:58,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:45:58,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:45:58,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:45:58,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:45:58,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:45:58,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:45:58,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:45:58,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:45:58,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:45:58,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:45:58,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:45:58,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:45:58,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:45:58,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:45:58,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:45:58,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:45:58,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:45:58,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:45:58,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:45:58,939 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 [2020-09-24 23:45:58,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:45:58,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:45:58,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:45:58,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:45:58,983 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:45:58,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:45:58,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:45:58,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:45:58,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:45:58,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:45:58,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:45:58,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:45:58,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:45:58,985 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:45:58,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:45:58,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:45:58,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:45:58,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:45:58,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:45:58,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:45:58,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:45:58,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:45:58,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:45:58,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:45:58,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:45:58,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:45:58,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:45:58,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:45:58,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:45:58,989 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 -> SingleStatement 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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=true; [2020-09-24 23:45:59,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:45:59,468 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:45:59,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:45:59,475 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:45:59,476 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:45:59,477 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-1.c [2020-09-24 23:45:59,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/095c9f090/532f3e098dd446d0b1d4c082871834a2/FLAG79470916d [2020-09-24 23:46:00,129 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:46:00,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_10-1.c [2020-09-24 23:46:00,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/095c9f090/532f3e098dd446d0b1d4c082871834a2/FLAG79470916d [2020-09-24 23:46:00,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/095c9f090/532f3e098dd446d0b1d4c082871834a2 [2020-09-24 23:46:00,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:46:00,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:46:00,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:46:00,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:46:00,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:46:00,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c00f55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00, skipping insertion in model container [2020-09-24 23:46:00,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:46:00,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:46:00,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:46:00,783 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:46:00,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:46:00,816 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:46:00,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00 WrapperNode [2020-09-24 23:46:00,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:46:00,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:46:00,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:46:00,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:46:00,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (1/1) ... [2020-09-24 23:46:00,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:46:00,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:46:00,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:46:00,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:46:00,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (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 [2020-09-24 23:46:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:46:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:46:01,016 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-24 23:46:01,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:46:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 23:46:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:46:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-24 23:46:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:46:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:46:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:46:01,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:46:01,226 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 23:46:01,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:46:01 BoogieIcfgContainer [2020-09-24 23:46:01,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:46:01,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:46:01,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:46:01,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:46:01,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:46:00" (1/3) ... [2020-09-24 23:46:01,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a00eebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:46:01, skipping insertion in model container [2020-09-24 23:46:01,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:00" (2/3) ... [2020-09-24 23:46:01,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a00eebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:46:01, skipping insertion in model container [2020-09-24 23:46:01,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:46:01" (3/3) ... [2020-09-24 23:46:01,243 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-1.c [2020-09-24 23:46:01,259 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:46:01,270 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:46:01,298 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:46:01,344 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:46:01,344 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:46:01,344 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:46:01,344 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:46:01,345 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:46:01,345 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:46:01,345 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:46:01,345 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:46:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-24 23:46:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 23:46:01,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:46:01,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:46:01,387 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:46:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:46:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-24 23:46:01,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:46:01,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338798714] [2020-09-24 23:46:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:46:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:01,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:01,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:01,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 23:46:01,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:46:01,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-09-24 23:46:01,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:46:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:46:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:46:01,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 23:46:01,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:46:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:01,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:01,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:01,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:46:01,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:01,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:46:01,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:01,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:46:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:01,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:01,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:01,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:01,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 23:46:01,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:46:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:46:01,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:46:01,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:46:01,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338798714] [2020-09-24 23:46:01,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:46:01,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 23:46:01,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136319209] [2020-09-24 23:46:01,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 23:46:01,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:46:01,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 23:46:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 23:46:01,919 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-24 23:46:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:46:02,048 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-24 23:46:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 23:46:02,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 23:46:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:46:02,064 INFO L225 Difference]: With dead ends: 44 [2020-09-24 23:46:02,065 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 23:46:02,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 23:46:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 23:46:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 23:46:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 23:46:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 23:46:02,130 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-24 23:46:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:46:02,131 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 23:46:02,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 23:46:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 23:46:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 23:46:02,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:46:02,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:46:02,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:46:02,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:46:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:46:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-24 23:46:02,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:46:02,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523562745] [2020-09-24 23:46:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:46:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:02,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:02,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 23:46:02,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:46:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-09-24 23:46:02,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:46:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:46:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:46:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:02,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:46:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:02,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:02,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:02,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:02,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:46:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:02,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:02,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:02,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:02,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 23:46:02,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:02,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:46:02,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:46:02,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:02,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:46:02,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523562745] [2020-09-24 23:46:02,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:46:02,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 23:46:02,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738667502] [2020-09-24 23:46:02,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 23:46:02,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:46:02,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 23:46:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 23:46:02,434 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-24 23:46:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:46:02,533 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-24 23:46:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 23:46:02,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 23:46:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:46:02,538 INFO L225 Difference]: With dead ends: 36 [2020-09-24 23:46:02,538 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 23:46:02,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 23:46:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 23:46:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 23:46:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 23:46:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 23:46:02,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-24 23:46:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:46:02,565 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 23:46:02,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 23:46:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 23:46:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 23:46:02,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:46:02,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-24 23:46:02,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:46:02,569 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:46:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:46:02,570 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-24 23:46:02,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:46:02,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889725390] [2020-09-24 23:46:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:46:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:02,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:02,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:02,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:02,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:04,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:04,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 23:46:04,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 23:46:04,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1943 [2020-09-24 23:46:04,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:46:04,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:46:04,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 23:46:04,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:04,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:46:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:04,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:04,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:04,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:46:04,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:04,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 23:46:04,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:04,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:04,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:04,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:04,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:04,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:46:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:04,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:04,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:04,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 23:46:04,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 23:46:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-24 23:46:04,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:46:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:46:04,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 23:46:04,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:04,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:04,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:04,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:04,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:04,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:04,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 23:46:04,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:04,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:46:04,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:04,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:04,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:04,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:46:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:04,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:04,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:04,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:04,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:04,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:46:04,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:04,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:04,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:04,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:46:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 23:46:04,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889725390] [2020-09-24 23:46:04,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:46:04,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 23:46:04,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839518514] [2020-09-24 23:46:04,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 23:46:04,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:46:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 23:46:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 23:46:04,865 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-09-24 23:46:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:46:05,025 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-09-24 23:46:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 23:46:05,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 23:46:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:46:05,028 INFO L225 Difference]: With dead ends: 44 [2020-09-24 23:46:05,029 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 23:46:05,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-24 23:46:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 23:46:05,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-24 23:46:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 23:46:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-09-24 23:46:05,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 33 [2020-09-24 23:46:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:46:05,041 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-09-24 23:46:05,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 23:46:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-09-24 23:46:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 23:46:05,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:46:05,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:46:05,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 23:46:05,044 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:46:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:46:05,044 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-24 23:46:05,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:46:05,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133383190] [2020-09-24 23:46:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:46:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:05,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:05,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:05,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:05,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:05,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:06,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:06,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 23:46:06,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 23:46:06,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-09-24 23:46:06,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:06,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:46:06,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:46:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 23:46:06,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:06,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:46:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:06,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:06,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:46:06,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:06,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 23:46:06,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:06,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:06,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:06,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:46:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:06,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:06,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:07,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 23:46:07,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 23:46:07,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-09-24 23:46:07,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:07,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:46:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:46:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 23:46:07,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:07,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:07,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:07,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:07,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:07,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:46:07,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:07,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:07,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:07,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:07,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:07,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 23:46:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:07,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:07,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:07,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:07,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 23:46:07,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:07,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:46:07,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:07,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:46:07,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 23:46:07,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133383190] [2020-09-24 23:46:07,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:46:07,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 23:46:07,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695483893] [2020-09-24 23:46:07,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 23:46:07,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:46:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 23:46:07,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 23:46:07,288 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 6 states. [2020-09-24 23:46:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:46:07,363 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-09-24 23:46:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 23:46:07,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-09-24 23:46:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:46:07,366 INFO L225 Difference]: With dead ends: 52 [2020-09-24 23:46:07,366 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 23:46:07,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:46:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 23:46:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2020-09-24 23:46:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 23:46:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-09-24 23:46:07,377 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 35 [2020-09-24 23:46:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:46:07,378 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-09-24 23:46:07,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 23:46:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-09-24 23:46:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 23:46:07,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:46:07,382 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:46:07,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 23:46:07,382 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:46:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:46:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1767822624, now seen corresponding path program 2 times [2020-09-24 23:46:07,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:46:07,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790324526] [2020-09-24 23:46:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:46:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:07,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:12,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:12,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-24 23:46:12,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 23:46:12,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-24 23:46:12,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:46:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:46:12,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 23:46:12,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 23:46:12,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:46:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:12,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:12,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:12,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:46:12,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:12,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 23:46:12,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:12,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:12,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:12,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:12,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:12,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:46:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:12,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:12,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:12,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:12,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:14,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:14,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:14,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:17,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-24 23:46:17,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 23:46:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 23:46:17,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 23:46:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 23:46:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 23:46:17,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:17,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:17,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:17,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 23:46:17,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:46:17,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 23:46:17,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:46:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:17,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 23:46:17,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:17,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:17,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:17,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:17,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:17,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 23:46:17,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:17,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:46:17,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:17,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:17,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:17,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:46:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:17,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:17,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:17,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:17,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:46:17,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:46:17,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:17,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 23:46:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:17,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:17,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:19,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 23:46:19,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:46:19,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1528 [2020-09-24 23:46:19,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:19,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:46:19,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:46:19,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 23:46:19,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:19,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:19,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 23:46:19,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:46:19,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-24 23:46:19,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:19,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 23:46:19,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:19,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:19,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:19,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:19,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:19,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:46:19,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:19,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:19,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 23:46:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:19,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:19,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:19,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:46:19,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:19,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:19,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 23:46:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:19,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:19,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:19,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:19,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:46:19,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:46:19,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 54 proven. 68 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-09-24 23:46:19,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790324526] [2020-09-24 23:46:19,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:46:19,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 23:46:19,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976595283] [2020-09-24 23:46:19,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 23:46:19,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:46:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 23:46:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 23:46:19,426 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 9 states. [2020-09-24 23:46:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:46:19,662 INFO L93 Difference]: Finished difference Result 88 states and 122 transitions. [2020-09-24 23:46:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 23:46:19,666 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-09-24 23:46:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:46:19,668 INFO L225 Difference]: With dead ends: 88 [2020-09-24 23:46:19,668 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 23:46:19,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-24 23:46:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 23:46:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-09-24 23:46:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 23:46:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-09-24 23:46:19,691 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 84 [2020-09-24 23:46:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:46:19,692 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-09-24 23:46:19,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 23:46:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-09-24 23:46:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 23:46:19,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:46:19,700 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:46:19,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 23:46:19,701 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:46:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:46:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash 501566307, now seen corresponding path program 1 times [2020-09-24 23:46:19,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:46:19,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258155445] [2020-09-24 23:46:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:46:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:19,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:20,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:22,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:22,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:24,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:24,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-24 23:46:24,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 23:46:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 23:46:24,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:46:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:46:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 23:46:24,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:46:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:24,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:24,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:24,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:46:24,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:24,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 23:46:24,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:24,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:24,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:24,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:24,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:24,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:46:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:24,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:24,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:24,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:24,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:25,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:25,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:25,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:26,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:28,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:29,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:29,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:29,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:29,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 23:46:29,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 23:46:29,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 23:46:29,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 23:46:29,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 23:46:29,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 23:46:29,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:29,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:29,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:29,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:29,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:29,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:30,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:46:30,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 23:46:30,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-09-24 23:46:30,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:30,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:46:30,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:30,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 23:46:30,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:46:30,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:30,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:30,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:30,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:30,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:46:30,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:30,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:30,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:30,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:30,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:30,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 23:46:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:30,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:30,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:30,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:46:30,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:46:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:30,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 23:46:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:30,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:31,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 23:46:31,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:46:31,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-09-24 23:46:31,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:46:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:46:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 23:46:31,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:31,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:31,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:46:31,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:31,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 23:46:31,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 23:46:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:31,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:31,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:31,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:31,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:31,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:46:31,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:31,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:31,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:31,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:31,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:31,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 23:46:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:31,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:31,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:31,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:31,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:46:31,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:31,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:31,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:31,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:31,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:31,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 23:46:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:31,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:31,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:31,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:46:31,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:31,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 56 proven. 75 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-09-24 23:46:31,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258155445] [2020-09-24 23:46:31,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:46:31,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 23:46:31,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165791202] [2020-09-24 23:46:31,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 23:46:31,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:46:31,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 23:46:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-24 23:46:31,390 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 14 states. [2020-09-24 23:46:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:46:31,634 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2020-09-24 23:46:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 23:46:31,635 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2020-09-24 23:46:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:46:31,637 INFO L225 Difference]: With dead ends: 102 [2020-09-24 23:46:31,637 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 23:46:31,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-09-24 23:46:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 23:46:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-09-24 23:46:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 23:46:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-09-24 23:46:31,648 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 87 [2020-09-24 23:46:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:46:31,648 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-09-24 23:46:31,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 23:46:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-09-24 23:46:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 23:46:31,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:46:31,651 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:46:31,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 23:46:31,651 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:46:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:46:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1883941443, now seen corresponding path program 2 times [2020-09-24 23:46:31,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:46:31,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994172221] [2020-09-24 23:46:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:46:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:31,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:32,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:32,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:33,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:36,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:36,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-09-24 23:46:36,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 23:46:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 23:46:36,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 23:46:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:46:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 23:46:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:36,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:46:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:36,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:46:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:36,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:46:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:36,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:36,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:37,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:37,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:37,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:37,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:37,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:37,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:38,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:38,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:38,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:38,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:41,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:41,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-24 23:46:41,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-24 23:46:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 23:46:41,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 23:46:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 23:46:41,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 23:46:41,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:41,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:41,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:41,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:41,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:42,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:43,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:46,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 23:46:46,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 23:46:46,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4304 [2020-09-24 23:46:46,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:46,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 23:46:46,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:46,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 23:46:46,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:46,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:46,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:46,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:46:46,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:46:46,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-09-24 23:46:46,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:46,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:46:46,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:46,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 23:46:46,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:46,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:46,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:46,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:46,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:46:46,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:46,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 23:46:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:46,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:46,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:46,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:46,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:46:46,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:46:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:46,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:46,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 23:46:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:46,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:46,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:46,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:46:46,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 23:46:46,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:46,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:46:46,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:46,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:46:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:46,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 23:46:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:47,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:47,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:47,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:49,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:49,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:49,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:49,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:51,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:51,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 23:46:51,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-24 23:46:51,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 23:46:51,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:46:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:46:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 23:46:51,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:51,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:51,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:51,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:51,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:56,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 23:46:56,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:46:56,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4479 [2020-09-24 23:46:56,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 23:46:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 23:46:56,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:56,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:56,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:56,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:46:56,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 23:46:56,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-09-24 23:46:56,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:56,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:46:56,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:56,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 23:46:56,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:56,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 23:46:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:56,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:56,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:56,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:46:56,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:56,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:56,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:56,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:56,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:56,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 23:46:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:56,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:56,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:46:56,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:56,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:46:56,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:46:56,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:56,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 23:46:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:56,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:56,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:56,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:46:56,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:56,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 23:46:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:46:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:46:56,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:46:56,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:46:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:46:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:46:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:46:56,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:46:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 140 proven. 211 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-24 23:46:56,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994172221] [2020-09-24 23:46:56,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:46:56,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 23:46:56,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046746779] [2020-09-24 23:46:56,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 23:46:56,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:46:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 23:46:56,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-24 23:46:56,419 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 18 states.