/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 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 17:02:26,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:02:26,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:02:26,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:02:26,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:02:26,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:02:26,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:02:26,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:02:26,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:02:26,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:02:26,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:02:26,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:02:26,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:02:26,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:02:26,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:02:26,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:02:26,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:02:26,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:02:26,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:02:26,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:02:26,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:02:26,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:02:26,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:02:26,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:02:26,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:02:26,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:02:26,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:02:26,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:02:26,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:02:26,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:02:26,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:02:26,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:02:26,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:02:26,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:02:26,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:02:26,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:02:26,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:02:26,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:02:26,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:02:26,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:02:26,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:02:26,809 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 17:02:26,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:02:26,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:02:26,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:02:26,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:02:26,870 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:02:26,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:02:26,870 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:02:26,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:02:26,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:02:26,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:02:26,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:02:26,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:02:26,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:02:26,872 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:02:26,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:02:26,873 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:02:26,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:02:26,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:02:26,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:02:26,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:02:26,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:02:26,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:02:26,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:02:26,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:02:26,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:02:26,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:02:26,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:02:26,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:02:26,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:02:26,877 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;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;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;log-additional-information=true; [2020-09-24 17:02:27,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:02:27,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:02:27,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:02:27,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:02:27,388 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:02:27,389 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-1.c [2020-09-24 17:02:27,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9ab7e01/7e57bb563ced423abb092f54008ac88e/FLAGe6ba42c80 [2020-09-24 17:02:28,028 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:02:28,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_10-1.c [2020-09-24 17:02:28,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9ab7e01/7e57bb563ced423abb092f54008ac88e/FLAGe6ba42c80 [2020-09-24 17:02:28,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9ab7e01/7e57bb563ced423abb092f54008ac88e [2020-09-24 17:02:28,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:02:28,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:02:28,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:28,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:02:28,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:02:28,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e64c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28, skipping insertion in model container [2020-09-24 17:02:28,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:02:28,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:02:28,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:28,649 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:02:28,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:28,687 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:02:28,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28 WrapperNode [2020-09-24 17:02:28,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:28,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:02:28,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:02:28,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:02:28,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:02:28,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:02:28,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:02:28,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:02:28,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (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 17:02:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:02:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:02:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-24 17:02:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:02:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:02:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:02:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-24 17:02:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:02:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:02:28,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:02:29,102 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:02:29,102 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:02:29,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:29 BoogieIcfgContainer [2020-09-24 17:02:29,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:02:29,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:02:29,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:02:29,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:02:29,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:02:28" (1/3) ... [2020-09-24 17:02:29,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4cf838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:29, skipping insertion in model container [2020-09-24 17:02:29,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (2/3) ... [2020-09-24 17:02:29,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4cf838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:29, skipping insertion in model container [2020-09-24 17:02:29,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:29" (3/3) ... [2020-09-24 17:02:29,132 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-1.c [2020-09-24 17:02:29,144 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:02:29,156 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:02:29,184 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:02:29,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:02:29,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:02:29,225 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:02:29,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:02:29,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:02:29,226 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:02:29,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:02:29,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:02:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-24 17:02:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 17:02:29,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:29,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:29,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:29,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-24 17:02:29,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:29,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497359492] [2020-09-24 17:02:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:29,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:29,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 17:02:29,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:29,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-09-24 17:02:29,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:29,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:29,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 17:02:29,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:29,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:02:29,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:29,751 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:29,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:29,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:29,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:29,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:29,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:29,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:29,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:29,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:29,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:29,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:29,773 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:29,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:29,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:29,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:02:29,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:02:29,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:29,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:02:29,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:29,795 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 17:02:29,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497359492] [2020-09-24 17:02:29,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:29,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:29,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432880529] [2020-09-24 17:02:29,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:29,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:29,831 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-24 17:02:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:29,921 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-24 17:02:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:29,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 17:02:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:29,937 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:02:29,938 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 17:02:29,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 17:02:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 17:02:29,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 17:02:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:30,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-24 17:02:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:30,007 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:30,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 17:02:30,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:30,010 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 17:02:30,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:02:30,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-24 17:02:30,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:30,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563635777] [2020-09-24 17:02:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,225 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 17:02:30,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:30,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-09-24 17:02:30,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 17:02:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:30,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:30,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,261 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:30,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:02:30,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:30,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:30,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,291 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:30,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:30,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 17:02:30,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:02:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:30,317 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 17:02:30,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563635777] [2020-09-24 17:02:30,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:30,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:30,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138324317] [2020-09-24 17:02:30,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:30,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:30,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:30,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:30,321 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-24 17:02:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:30,356 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-24 17:02:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:30,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 17:02:30,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:30,358 INFO L225 Difference]: With dead ends: 36 [2020-09-24 17:02:30,358 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:02:30,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 17:02:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:02:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 17:02:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:30,368 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-24 17:02:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:30,368 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:30,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:02:30,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:30,374 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 17:02:30,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:02:30,374 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-24 17:02:30,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:30,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434254504] [2020-09-24 17:02:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,334 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:02:32,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:02:32,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1934 [2020-09-24 17:02:32,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:02:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:32,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,357 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:32,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:02:32,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:32,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:32,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,572 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:02:32,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:32,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-09-24 17:02:32,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 17:02:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:32,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,613 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:32,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:02:32,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:32,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:32,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:02:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,629 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:32,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:32,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:02:32,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:32,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:32,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:32,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:02:32,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434254504] [2020-09-24 17:02:32,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:32,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:02:32,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852414213] [2020-09-24 17:02:32,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:02:32,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:02:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:02:32,651 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-24 17:02:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:32,736 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-09-24 17:02:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:32,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 17:02:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:32,739 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:02:32,739 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 17:02:32,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 17:02:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 17:02:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-24 17:02:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 17:02:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-09-24 17:02:32,751 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 33 [2020-09-24 17:02:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:32,751 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-09-24 17:02:32,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:02:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-09-24 17:02:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 17:02:32,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:32,754 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 17:02:32,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:02:32,755 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-24 17:02:32,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:32,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753792623] [2020-09-24 17:02:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,479 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:02:34,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:02:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1715 [2020-09-24 17:02:34,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:02:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:02:34,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:34,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,491 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:34,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:34,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:02:34,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:34,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:34,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:34,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,647 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:02:34,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:34,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-24 17:02:34,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:02:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:02:34,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:34,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,680 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:34,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:34,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 17:02:34,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:34,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:34,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,729 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:34,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:34,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 17:02:34,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:34,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 17:02:34,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753792623] [2020-09-24 17:02:34,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:34,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:34,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152096158] [2020-09-24 17:02:34,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:34,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:34,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:34,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:34,770 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 7 states. [2020-09-24 17:02:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:34,996 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2020-09-24 17:02:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:02:34,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-24 17:02:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:34,999 INFO L225 Difference]: With dead ends: 79 [2020-09-24 17:02:34,999 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 17:02:35,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:02:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 17:02:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-09-24 17:02:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 17:02:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-09-24 17:02:35,025 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 35 [2020-09-24 17:02:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:35,026 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-09-24 17:02:35,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-09-24 17:02:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 17:02:35,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:35,032 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:35,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:02:35,033 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1693530075, now seen corresponding path program 1 times [2020-09-24 17:02:35,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:35,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659850218] [2020-09-24 17:02:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:57,892 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:57,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 17:02:57,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 17:02:57,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22834 [2020-09-24 17:02:57,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:57,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:02:57,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:02:57,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 17:02:57,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:57,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:57,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:57,904 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:57,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:57,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:57,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:02:57,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:57,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:57,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:57,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:57,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 17:02:58,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:02:58,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-09-24 17:02:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:02:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:02:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 17:02:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:58,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,907 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:58,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:02:58,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:58,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 17:02:58,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:58,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:58,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:02:58,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:58,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:58,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:58,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:58,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:58,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:58,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:02:58,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:58,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:58,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:58,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:58,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:58,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:02:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:58,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,950 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:58,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:58,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:58,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:02:58,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:58,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:58,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 17:02:58,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:58,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:58,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 17:02:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:58,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,964 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:58,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:58,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:02:58,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-24 17:02:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:58,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-24 17:02:58,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659850218] [2020-09-24 17:02:58,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:58,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:02:58,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008585397] [2020-09-24 17:02:58,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:02:58,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:02:58,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:02:58,978 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 6 states. [2020-09-24 17:02:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:59,080 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-09-24 17:02:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:59,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-09-24 17:02:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:59,086 INFO L225 Difference]: With dead ends: 74 [2020-09-24 17:02:59,086 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 17:02:59,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:02:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 17:02:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-24 17:02:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 17:02:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-09-24 17:02:59,101 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 51 [2020-09-24 17:02:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:59,102 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-09-24 17:02:59,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:02:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-09-24 17:02:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 17:02:59,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:59,106 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:59,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:02:59,109 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:59,109 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 2 times [2020-09-24 17:02:59,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:59,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62387389] [2020-09-24 17:02:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:59,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:59,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,248 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:03:04,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:03:04,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:03:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-09-24 17:03:04,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:03:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:03:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 17:03:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 17:03:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:03:04,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:03:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:03:04,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,274 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:03:04,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:03:04,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:03:04,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:03:04,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:03:04,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:03:04,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:03:04,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:03:04,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:03:04,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:03:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:03:04,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,404 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:03:04,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:03:04,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:03:04,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-24 17:03:04,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:03:04,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 17:03:04,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:03:04,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 17:03:04,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:03:04,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:03:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:03:04,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,506 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:03:04,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:03:04,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:03:04,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 17:03:04,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:03:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:03:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:03:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 17:03:04,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:03:04,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:03:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:03:04,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,557 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:03:04,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:03:04,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:03:04,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:03:04,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:03:04,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:03:04,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:03:04,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:03:04,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:03:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:03:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:03:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,573 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:03:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:03:04,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:03:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:03:04,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:03:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:03:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:03:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:03:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:03:04,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:03:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:03:04,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,613 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:03:04,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:03:04,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:03:04,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 17:03:04,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:03:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:03:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:03:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:03:04,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:03:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-24 17:03:04,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62387389] [2020-09-24 17:03:04,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:03:04,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:03:04,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271602495] [2020-09-24 17:03:04,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:03:04,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:03:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:03:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:03:04,640 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 11 states. [2020-09-24 17:03:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:03:04,777 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2020-09-24 17:03:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 17:03:04,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-09-24 17:03:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:03:04,780 INFO L225 Difference]: With dead ends: 63 [2020-09-24 17:03:04,780 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 17:03:04,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:03:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 17:03:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-09-24 17:03:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-24 17:03:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-09-24 17:03:04,790 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 52 [2020-09-24 17:03:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:03:04,791 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-09-24 17:03:04,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:03:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-09-24 17:03:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 17:03:04,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:03:04,794 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 17:03:04,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:03:04,794 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:03:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:03:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash 501566307, now seen corresponding path program 3 times [2020-09-24 17:03:04,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:03:04,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067798518] [2020-09-24 17:03:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:03:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:03:04,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:05,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:07,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:07,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:09,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:21,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking...