/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 --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 interpolation-heuristic=FIRST --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/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:21:35,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:21:35,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:21:35,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:21:35,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:21:35,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:21:35,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:21:35,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:21:35,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:21:35,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:21:35,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:21:35,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:21:35,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:21:35,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:21:35,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:21:35,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:21:35,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:21:35,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:21:35,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:21:35,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:21:35,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:21:35,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:21:35,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:21:35,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:21:35,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:21:35,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:21:35,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:21:35,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:21:35,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:21:35,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:21:35,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:21:35,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:21:35,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:21:35,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:21:35,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:21:35,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:21:35,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:21:35,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:21:35,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:21:35,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:21:35,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:21:35,888 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 [2020-09-21 11:21:35,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:21:35,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:21:35,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:21:35,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:21:35,940 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:21:35,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:21:35,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:21:35,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:21:35,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:21:35,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:21:35,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:21:35,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:21:35,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:21:35,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:21:35,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:21:35,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:21:35,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:21:35,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:21:35,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:21:35,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:21:35,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:21:35,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:21:35,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:21:35,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:21:35,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:21:35,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:21:35,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:21:35,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:21:35,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:21:35,946 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:21:36,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:21:36,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:21:36,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:21:36,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:21:36,424 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:21:36,425 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-09-21 11:21:36,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3fe0d44b/e1ca6574209c421491985a954fa58ab3/FLAGf630fb80e [2020-09-21 11:21:37,070 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:21:37,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-09-21 11:21:37,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3fe0d44b/e1ca6574209c421491985a954fa58ab3/FLAGf630fb80e [2020-09-21 11:21:37,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3fe0d44b/e1ca6574209c421491985a954fa58ab3 [2020-09-21 11:21:37,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:21:37,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:21:37,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:37,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:21:37,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:21:37,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2719192c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37, skipping insertion in model container [2020-09-21 11:21:37,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:21:37,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:21:37,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:37,734 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:21:37,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:37,767 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:21:37,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37 WrapperNode [2020-09-21 11:21:37,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:37,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:21:37,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:21:37,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:21:37,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (1/1) ... [2020-09-21 11:21:37,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:21:37,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:21:37,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:21:37,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:21:37,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (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 [2020-09-21 11:21:37,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:21:37,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:21:37,951 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 11:21:37,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:21:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:21:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:21:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 11:21:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:21:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:21:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:21:38,132 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:21:38,132 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:21:38,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:38 BoogieIcfgContainer [2020-09-21 11:21:38,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:21:38,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:21:38,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:21:38,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:21:38,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:21:37" (1/3) ... [2020-09-21 11:21:38,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9ea42a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:38, skipping insertion in model container [2020-09-21 11:21:38,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:37" (2/3) ... [2020-09-21 11:21:38,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9ea42a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:38, skipping insertion in model container [2020-09-21 11:21:38,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:38" (3/3) ... [2020-09-21 11:21:38,147 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-09-21 11:21:38,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:21:38,168 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:21:38,189 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:21:38,216 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:21:38,216 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:21:38,216 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:21:38,216 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:21:38,217 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:21:38,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:21:38,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:21:38,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:21:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:21:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:21:38,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:38,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:38,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-21 11:21:38,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:38,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589266581] [2020-09-21 11:21:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:38,403 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:38,403 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:38,404 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:38,404 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:38,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:21:38,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:38,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:21:38,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:21:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:38,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:38,467 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:38,467 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:38,467 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:38,468 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:38,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:38,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:38,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:21:38,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:38,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:38,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:38,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:38,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:38,514 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:38,515 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:38,515 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:38,516 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:38,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:38,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:38,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:21:38,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:38,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:21:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:21:38,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589266581] [2020-09-21 11:21:38,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:38,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:21:38,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674814236] [2020-09-21 11:21:38,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:21:38,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:21:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:38,709 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-21 11:21:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:38,796 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 11:21:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:21:38,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:21:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:38,813 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:21:38,813 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:21:38,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:21:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:21:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:21:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:21:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 11:21:38,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 11:21:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:38,871 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 11:21:38,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:21:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 11:21:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:21:38,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:38,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:38,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:21:38,874 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-21 11:21:38,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:38,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336756630] [2020-09-21 11:21:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:38,913 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:38,913 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:38,914 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:38,914 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:38,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:21:38,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:38,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:21:38,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:38,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:21:38,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:38,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:38,959 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:38,959 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:38,960 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:38,960 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:38,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:38,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:38,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:21:38,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:38,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:38,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:38,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:38,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:38,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,015 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,015 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,015 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,016 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:39,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:21:39,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:21:39,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:39,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,097 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,098 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,098 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,098 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:39,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:21:39,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:39,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:21:39,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336756630] [2020-09-21 11:21:39,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:39,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:21:39,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742599013] [2020-09-21 11:21:39,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:21:39,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:21:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:21:39,155 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-21 11:21:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:39,224 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-21 11:21:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:21:39,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-21 11:21:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:39,226 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:21:39,226 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:21:39,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:21:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:21:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:21:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:21:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 11:21:39,235 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-21 11:21:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:39,236 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 11:21:39,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:21:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 11:21:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:21:39,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:39,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:39,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:21:39,238 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-21 11:21:39,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:39,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796544773] [2020-09-21 11:21:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,274 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,274 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,274 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,275 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:21:39,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:21:39,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:21:39,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:39,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:21:39,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:39,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,305 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,305 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,306 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,307 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:39,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:21:39,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:39,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,344 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,345 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,345 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,345 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:39,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:21:39,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:21:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:21:39,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:39,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,405 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,405 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,408 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,409 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:39,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:21:39,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:39,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:39,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:21:39,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,478 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,479 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,479 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,479 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:39,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:21:39,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:39,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:39,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 11:21:39,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796544773] [2020-09-21 11:21:39,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:39,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:21:39,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985570044] [2020-09-21 11:21:39,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:21:39,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:21:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:21:39,509 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-09-21 11:21:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:39,603 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-21 11:21:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:21:39,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-21 11:21:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:39,605 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:21:39,605 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:21:39,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:21:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:21:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 11:21:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:21:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 11:21:39,613 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-21 11:21:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:39,613 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 11:21:39,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:21:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 11:21:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:21:39,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:39,615 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:39,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:21:39,615 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-21 11:21:39,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:39,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353052687] [2020-09-21 11:21:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,652 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,652 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,652 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,653 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:21:39,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:21:39,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:21:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:21:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:39,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,689 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,689 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,689 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,690 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:39,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:39,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:39,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:39,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,767 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,768 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,768 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,768 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:39,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 11:21:39,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:21:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:21:39,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:39,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,840 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,840 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,840 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,840 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:39,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:21:39,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:39,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:39,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,888 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,889 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,889 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,889 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:39,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:21:39,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:39,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 11:21:39,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:39,944 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:39,945 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:39,945 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:39,945 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:39,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:39,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:39,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:21:39,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:21:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 11:21:39,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353052687] [2020-09-21 11:21:39,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:39,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:21:39,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607056565] [2020-09-21 11:21:39,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:21:39,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:21:39,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:21:39,984 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-09-21 11:21:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:40,063 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-21 11:21:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:21:40,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-21 11:21:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:40,066 INFO L225 Difference]: With dead ends: 31 [2020-09-21 11:21:40,066 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 11:21:40,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:21:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 11:21:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 11:21:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:21:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-21 11:21:40,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-21 11:21:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:40,074 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-21 11:21:40,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:21:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-21 11:21:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:21:40,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:40,076 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:40,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:21:40,076 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-21 11:21:40,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:40,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982747784] [2020-09-21 11:21:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,114 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,114 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,114 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,114 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:21:40,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:21:40,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:21:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:21:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,136 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,136 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,136 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,136 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:40,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:40,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,170 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,170 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,170 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:40,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:21:40,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:21:40,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:40,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:21:40,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,220 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,220 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,220 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,221 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:40,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:21:40,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:40,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,261 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,261 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,261 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,261 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:40,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:21:40,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:40,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,301 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,301 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,302 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,302 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:40,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:21:40,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:40,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:40,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,352 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,353 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,353 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,353 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:40,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:21:40,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:40,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:40,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-21 11:21:40,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982747784] [2020-09-21 11:21:40,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:40,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:21:40,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125806851] [2020-09-21 11:21:40,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:21:40,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:21:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:21:40,401 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-09-21 11:21:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:40,498 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-21 11:21:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:21:40,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-21 11:21:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:40,500 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:21:40,500 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 11:21:40,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:21:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 11:21:40,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-21 11:21:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:21:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-21 11:21:40,509 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-21 11:21:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:40,509 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-21 11:21:40,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:21:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-21 11:21:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:21:40,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:40,511 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:40,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:21:40,512 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:40,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-21 11:21:40,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:40,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106937462] [2020-09-21 11:21:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,555 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,556 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,556 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,556 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-21 11:21:40,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:21:40,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:21:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:40,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,578 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,578 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,578 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,579 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:40,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:40,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:40,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:40,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,621 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,622 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,622 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,623 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:21:40,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:21:40,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:21:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-21 11:21:40,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:40,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,689 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,689 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,690 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,690 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:40,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:21:40,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:21:40,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:21:40,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,740 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,740 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,740 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,741 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:40,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:21:40,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:40,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:40,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,783 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,783 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,783 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,783 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:40,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:21:40,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:40,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,813 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,813 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,814 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,814 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:40,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:21:40,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:40,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:40,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:40,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:40,838 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:40,838 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:40,839 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:40,839 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:40,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:40,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:40,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:21:40,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:40,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:40,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:40,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:40,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 11:21:40,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106937462] [2020-09-21 11:21:40,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:40,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:21:40,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343537958] [2020-09-21 11:21:40,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:21:40,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:40,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:21:40,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:21:40,867 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-09-21 11:21:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:40,957 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-21 11:21:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:21:40,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-21 11:21:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:40,959 INFO L225 Difference]: With dead ends: 37 [2020-09-21 11:21:40,959 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:21:40,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:21:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:21:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 11:21:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:21:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-21 11:21:40,966 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-21 11:21:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:40,967 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-21 11:21:40,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:21:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-21 11:21:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 11:21:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:40,969 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:40,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:21:40,969 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:40,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-21 11:21:40,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:40,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50480595] [2020-09-21 11:21:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,015 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,016 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,016 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,016 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:21:41,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-21 11:21:41,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:21:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:21:41,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,038 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,038 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,038 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,039 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:41,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:41,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:41,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,085 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,086 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,086 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,086 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:21:41,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:21:41,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:21:41,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:21:41,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,150 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,150 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,150 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,151 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:21:41,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:21:41,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:21:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-21 11:21:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,200 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,201 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,201 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,201 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:41,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:21:41,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:21:41,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:21:41,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,244 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,244 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,245 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,245 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:41,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:21:41,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:41,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:41,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,281 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,281 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,282 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,282 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:41,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:21:41,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:41,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,310 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,310 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,311 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,311 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:41,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:21:41,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:41,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,344 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,344 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,344 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,344 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:41,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:21:41,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-21 11:21:41,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50480595] [2020-09-21 11:21:41,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:41,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:21:41,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988204799] [2020-09-21 11:21:41,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:21:41,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:21:41,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:21:41,374 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-09-21 11:21:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:41,494 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-21 11:21:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:21:41,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-09-21 11:21:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:41,496 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:21:41,496 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:21:41,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:21:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:21:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-21 11:21:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:21:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-21 11:21:41,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-21 11:21:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:41,504 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-21 11:21:41,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:21:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-21 11:21:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:21:41,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:41,505 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:41,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:21:41,506 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-09-21 11:21:41,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:41,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848321175] [2020-09-21 11:21:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,561 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,562 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,562 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,562 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 11:21:41,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:21:41,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:21:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 11:21:41,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,583 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,583 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,584 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,584 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:41,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:41,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,639 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,640 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,640 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,640 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:21:41,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:21:41,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:21:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-21 11:21:41,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,713 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,714 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,714 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,714 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:21:41,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:21:41,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:21:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-21 11:21:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,779 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,779 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,779 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,779 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:21:41,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 11:21:41,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:21:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-21 11:21:41,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,829 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,830 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,830 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,830 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:41,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:21:41,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:21:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:21:41,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:41,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,875 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,875 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,876 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,876 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:41,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:21:41,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:41,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:41,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:41,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,916 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,916 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,917 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,917 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:41,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:21:41,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:41,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,950 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,950 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,951 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,951 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:41,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:41,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:41,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:41,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:41,980 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:41,981 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:41,981 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:41,981 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:41,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:41,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:41,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:21:41,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:41,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 16 proven. 89 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-09-21 11:21:42,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848321175] [2020-09-21 11:21:42,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:42,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:21:42,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237545011] [2020-09-21 11:21:42,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:21:42,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:42,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:21:42,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:21:42,015 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-09-21 11:21:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:42,141 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-21 11:21:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:21:42,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-21 11:21:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:42,143 INFO L225 Difference]: With dead ends: 43 [2020-09-21 11:21:42,143 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:21:42,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:21:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:21:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-21 11:21:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 11:21:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-21 11:21:42,151 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-21 11:21:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:42,151 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-21 11:21:42,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:21:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-21 11:21:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 11:21:42,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:42,153 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:42,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:21:42,154 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-09-21 11:21:42,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:42,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152498597] [2020-09-21 11:21:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,232 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,232 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,232 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-21 11:21:42,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-21 11:21:42,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:21:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-21 11:21:42,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:42,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,253 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,253 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,253 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,253 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:42,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:42,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:42,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:42,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,318 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,319 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,319 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,319 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 11:21:42,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 11:21:42,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:21:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:42,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-21 11:21:42,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:42,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,429 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,430 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,430 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,430 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:21:42,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:21:42,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:21:42,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-21 11:21:42,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:42,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,514 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,515 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,515 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,516 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:21:42,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:21:42,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:21:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-21 11:21:42,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:42,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,577 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,577 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,577 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,577 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:21:42,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:21:42,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:21:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-21 11:21:42,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:42,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,627 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,628 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,628 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,628 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:42,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:21:42,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:21:42,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:21:42,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:42,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,673 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,673 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,673 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,674 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:42,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:21:42,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:42,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:42,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,713 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,714 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,714 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,714 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:42,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:21:42,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:42,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,756 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,757 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,757 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,757 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:42,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:42,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:42,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:42,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:42,787 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:42,787 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:42,788 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:42,788 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:42,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:42,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:42,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:21:42,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:42,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:42,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:42,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:42,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 113 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-09-21 11:21:42,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152498597] [2020-09-21 11:21:42,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:42,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:21:42,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308654619] [2020-09-21 11:21:42,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:21:42,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:42,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:21:42,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:21:42,828 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-09-21 11:21:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:42,991 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-21 11:21:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:21:42,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-21 11:21:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:42,993 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:21:42,993 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:21:42,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:21:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:21:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-21 11:21:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:21:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-21 11:21:43,000 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-21 11:21:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:43,001 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-21 11:21:43,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:21:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-21 11:21:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 11:21:43,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:43,002 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:43,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:21:43,003 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-09-21 11:21:43,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:43,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861998755] [2020-09-21 11:21:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,081 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,082 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,082 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-21 11:21:43,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-21 11:21:43,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:21:43,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:43,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-21 11:21:43,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,110 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,111 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,111 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,111 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:43,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:43,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:43,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:43,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:43,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,196 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,196 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,196 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,197 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-21 11:21:43,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-21 11:21:43,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:21:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-21 11:21:43,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,321 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,322 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,322 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 11:21:43,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-21 11:21:43,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:21:43,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-21 11:21:43,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,401 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,401 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,401 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,402 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:21:43,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 11:21:43,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:21:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-21 11:21:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,468 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,468 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,469 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,469 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:21:43,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:21:43,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:21:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-21 11:21:43,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,528 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,529 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,529 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,529 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:21:43,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 11:21:43,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:21:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-21 11:21:43,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,589 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,590 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,590 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,590 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:43,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:21:43,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:21:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:21:43,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,634 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,634 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,635 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,635 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:43,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:21:43,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:43,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:43,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:43,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,671 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,671 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,671 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,672 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:43,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:21:43,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:43,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,705 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,705 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,705 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,706 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:43,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:43,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:43,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:43,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:43,733 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:43,733 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:43,734 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:43,734 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:43,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:43,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:43,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:21:43,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:43,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:43,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:43,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 40 proven. 131 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-21 11:21:43,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861998755] [2020-09-21 11:21:43,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:43,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:21:43,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274557865] [2020-09-21 11:21:43,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:21:43,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:21:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:21:43,775 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-09-21 11:21:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:43,929 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-21 11:21:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:21:43,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-21 11:21:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:43,931 INFO L225 Difference]: With dead ends: 49 [2020-09-21 11:21:43,931 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 11:21:43,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:21:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 11:21:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-21 11:21:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 11:21:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-21 11:21:43,938 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-21 11:21:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:43,939 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-21 11:21:43,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:21:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-21 11:21:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 11:21:43,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:43,940 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:43,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:21:43,940 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-09-21 11:21:43,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:43,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069554536] [2020-09-21 11:21:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:21:43,961 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:21:43,961 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:21:43,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:21:43,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:21:43 BoogieIcfgContainer [2020-09-21 11:21:43,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:21:43,998 INFO L168 Benchmark]: Toolchain (without parser) took 6549.42 ms. Allocated memory was 138.9 MB in the beginning and 291.0 MB in the end (delta: 152.0 MB). Free memory was 102.4 MB in the beginning and 131.3 MB in the end (delta: -28.9 MB). Peak memory consumption was 123.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:43,999 INFO L168 Benchmark]: CDTParser took 0.88 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:21:44,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.69 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:44,000 INFO L168 Benchmark]: Boogie Preprocessor took 30.40 ms. Allocated memory is still 138.9 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:44,001 INFO L168 Benchmark]: RCFGBuilder took 337.33 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 169.3 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:44,002 INFO L168 Benchmark]: TraceAbstraction took 5856.21 ms. Allocated memory was 201.3 MB in the beginning and 291.0 MB in the end (delta: 89.7 MB). Free memory was 168.7 MB in the beginning and 131.3 MB in the end (delta: 37.3 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:44,005 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.69 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.40 ms. Allocated memory is still 138.9 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.33 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 169.3 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5856.21 ms. Allocated memory was 201.3 MB in the beginning and 291.0 MB in the end (delta: 89.7 MB). Free memory was 168.7 MB in the beginning and 131.3 MB in the end (delta: 37.3 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 270 SDslu, 464 SDs, 0 SdLazy, 272 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 45504 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 402/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...