/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --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/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:31:26,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:31:26,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:31:26,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:31:26,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:31:26,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:31:26,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:31:26,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:31:26,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:31:26,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:31:26,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:31:26,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:31:26,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:31:26,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:31:26,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:31:26,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:31:26,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:31:26,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:31:26,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:31:26,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:31:26,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:31:26,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:31:26,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:31:26,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:31:26,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:31:26,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:31:26,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:31:26,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:31:26,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:31:26,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:31:26,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:31:26,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:31:26,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:31:26,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:31:26,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:31:26,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:31:26,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:31:26,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:31:26,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:31:26,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:31:26,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:31:26,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:31:26,277 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:31:26,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:31:26,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:31:26,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:31:26,279 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:31:26,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:31:26,280 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:31:26,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:31:26,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:31:26,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:31:26,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:31:26,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:31:26,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:31:26,281 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:31:26,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:31:26,281 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:31:26,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:31:26,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:31:26,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:31:26,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:31:26,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:31:26,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:31:26,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:31:26,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:31:26,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:31:26,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:31:26,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:31:26,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:31:26,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:31:26,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:31:26,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:31:26,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:31:26,778 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:31:26,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:31:26,782 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:31:26,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-09-24 21:31:26,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e86f3e78b/c28b238bb8744b40af9c51c4cc354bbf/FLAG4a696a8d0 [2020-09-24 21:31:27,446 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:31:27,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-09-24 21:31:27,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e86f3e78b/c28b238bb8744b40af9c51c4cc354bbf/FLAG4a696a8d0 [2020-09-24 21:31:27,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e86f3e78b/c28b238bb8744b40af9c51c4cc354bbf [2020-09-24 21:31:27,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:31:27,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:31:27,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:31:27,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:31:27,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:31:27,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:31:27" (1/1) ... [2020-09-24 21:31:27,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:27, skipping insertion in model container [2020-09-24 21:31:27,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:31:27" (1/1) ... [2020-09-24 21:31:27,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:31:27,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:31:28,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:31:28,065 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:31:28,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:31:28,099 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:31:28,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28 WrapperNode [2020-09-24 21:31:28,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:31:28,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:31:28,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:31:28,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:31:28,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... [2020-09-24 21:31:28,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... [2020-09-24 21:31:28,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... [2020-09-24 21:31:28,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... [2020-09-24 21:31:28,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... [2020-09-24 21:31:28,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... [2020-09-24 21:31:28,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... [2020-09-24 21:31:28,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:31:28,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:31:28,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:31:28,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:31:28,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:31:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:31:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:31:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-09-24 21:31:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:31:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:31:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:31:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-09-24 21:31:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:31:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:31:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:31:28,553 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:31:28,553 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:31:28,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:31:28 BoogieIcfgContainer [2020-09-24 21:31:28,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:31:28,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:31:28,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:31:28,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:31:28,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:31:27" (1/3) ... [2020-09-24 21:31:28,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9ba21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:31:28, skipping insertion in model container [2020-09-24 21:31:28,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:31:28" (2/3) ... [2020-09-24 21:31:28,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9ba21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:31:28, skipping insertion in model container [2020-09-24 21:31:28,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:31:28" (3/3) ... [2020-09-24 21:31:28,572 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-09-24 21:31:28,589 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:31:28,600 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:31:28,628 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:31:28,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:31:28,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:31:28,665 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:31:28,665 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:31:28,665 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:31:28,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:31:28,666 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:31:28,666 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:31:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-09-24 21:31:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 21:31:28,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:28,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:28,707 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-09-24 21:31:28,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:28,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225433665] [2020-09-24 21:31:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:29,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 21:31:29,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:29,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-09-24 21:31:29,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:29,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:29,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:31:29,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:31:29,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:31:29,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:29,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:29,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:29,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:29,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:29,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:29,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:29,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:29,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:29,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:29,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:29,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:31:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:31:29,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:31:29,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:31:29,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:31:29,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225433665] [2020-09-24 21:31:29,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:31:29,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:31:29,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089047206] [2020-09-24 21:31:29,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:31:29,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:31:29,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:31:29,498 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-09-24 21:31:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:29,662 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-09-24 21:31:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:31:29,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-24 21:31:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:29,679 INFO L225 Difference]: With dead ends: 60 [2020-09-24 21:31:29,680 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 21:31:29,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:31:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 21:31:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-24 21:31:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 21:31:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-24 21:31:29,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-09-24 21:31:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:29,748 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-24 21:31:29,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:31:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-24 21:31:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 21:31:29,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:29,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:29,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:31:29,752 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-09-24 21:31:29,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:29,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766877106] [2020-09-24 21:31:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:30,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 21:31:30,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:31:30,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-09-24 21:31:30,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:30,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:31:30,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:31:30,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:31:30,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:30,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:30,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:30,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:30,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:30,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:30,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:30,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:30,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:31:30,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:30,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:31:30,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:30,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:30,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:30,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:30,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:31:30,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766877106] [2020-09-24 21:31:30,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:31:30,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 21:31:30,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495461437] [2020-09-24 21:31:30,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:31:30,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:31:30,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:31:30,346 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-09-24 21:31:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:30,457 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-09-24 21:31:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:31:30,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-24 21:31:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:30,460 INFO L225 Difference]: With dead ends: 46 [2020-09-24 21:31:30,460 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 21:31:30,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:31:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 21:31:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-09-24 21:31:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 21:31:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-24 21:31:30,470 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-09-24 21:31:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:30,471 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-24 21:31:30,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:31:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-24 21:31:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 21:31:30,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:30,473 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:30,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:31:30,474 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-09-24 21:31:30,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:30,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071825555] [2020-09-24 21:31:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:30,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 21:31:30,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:31:30,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-09-24 21:31:30,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:30,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:31:30,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:31:30,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:31:30,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:30,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:30,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:30,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:30,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:30,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:30,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:30,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:30,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:31,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:31,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:31:31,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-24 21:31:31,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:31:31,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:31:31,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 21:31:31,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:31,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:31,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:31,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:31,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:31:31,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:31,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:31:31,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:31:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 21:31:31,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071825555] [2020-09-24 21:31:31,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:31:31,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 21:31:31,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340266526] [2020-09-24 21:31:31,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:31:31,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:31,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:31:31,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:31:31,244 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-09-24 21:31:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:31,492 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-09-24 21:31:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:31:31,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-24 21:31:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:31,495 INFO L225 Difference]: With dead ends: 56 [2020-09-24 21:31:31,495 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 21:31:31,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:31:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 21:31:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-09-24 21:31:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 21:31:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-09-24 21:31:31,522 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 35 [2020-09-24 21:31:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:31,523 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-09-24 21:31:31,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:31:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-09-24 21:31:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 21:31:31,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:31,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:31,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:31:31,528 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2030561919, now seen corresponding path program 1 times [2020-09-24 21:31:31,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:31,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21257860] [2020-09-24 21:31:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:31,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:31,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:31,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 21:31:31,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:31:31,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-09-24 21:31:31,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:31:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:31:31,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:31,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:31,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:31,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:31,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:31,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:31,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:31,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:31,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:31,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:31,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:31,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:31,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:31,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:32,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:32,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:31:32,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 21:31:32,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:31:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:31:32,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:32,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:32,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:32,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:31:32,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 21:31:32,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:31:32,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:31:32,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21257860] [2020-09-24 21:31:32,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:31:32,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 21:31:32,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793548170] [2020-09-24 21:31:32,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:31:32,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:31:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:31:32,146 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 9 states. [2020-09-24 21:31:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:32,315 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-09-24 21:31:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:31:32,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-24 21:31:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:32,318 INFO L225 Difference]: With dead ends: 58 [2020-09-24 21:31:32,318 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 21:31:32,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:31:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 21:31:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-24 21:31:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 21:31:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-09-24 21:31:32,330 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 35 [2020-09-24 21:31:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:32,331 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-09-24 21:31:32,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:31:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-09-24 21:31:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:31:32,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:32,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:32,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:31:32,334 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:32,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2122258312, now seen corresponding path program 1 times [2020-09-24 21:31:32,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:32,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272744631] [2020-09-24 21:31:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:32,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:32,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:32,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:32,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 21:31:33,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:31:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-09-24 21:31:33,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:31:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:31:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:31:33,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:33,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:33,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:33,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:33,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:33,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:31:33,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-24 21:31:33,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:31:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:31:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:33,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:31:33,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:31:33,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:33,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:33,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:33,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:31:33,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272744631] [2020-09-24 21:31:33,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:33,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:31:33,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153982285] [2020-09-24 21:31:33,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:31:33,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:33,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:31:33,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:31:33,253 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 9 states. [2020-09-24 21:31:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:33,452 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-09-24 21:31:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:31:33,453 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-09-24 21:31:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:33,455 INFO L225 Difference]: With dead ends: 61 [2020-09-24 21:31:33,455 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 21:31:33,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:31:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 21:31:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-09-24 21:31:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-24 21:31:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-09-24 21:31:33,465 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 36 [2020-09-24 21:31:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:33,465 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-09-24 21:31:33,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:31:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-09-24 21:31:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:31:33,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:33,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:33,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:31:33,468 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 404002040, now seen corresponding path program 1 times [2020-09-24 21:31:33,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:33,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165366879] [2020-09-24 21:31:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:35,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 21:31:35,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:31:35,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1536 [2020-09-24 21:31:35,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:35,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:31:35,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:31:35,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:31:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:35,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:35,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:35,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:35,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:35,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:35,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:35,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:31:35,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:35,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-09-24 21:31:35,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:31:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:31:35,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:35,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:35,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:35,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:31:35,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:31:35,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:35,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 21:31:35,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165366879] [2020-09-24 21:31:35,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:35,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:31:35,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331878069] [2020-09-24 21:31:35,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:31:35,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:31:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:31:35,467 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 10 states. [2020-09-24 21:31:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:35,754 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-09-24 21:31:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:31:35,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-24 21:31:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:35,756 INFO L225 Difference]: With dead ends: 61 [2020-09-24 21:31:35,756 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 21:31:35,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:31:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 21:31:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-24 21:31:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 21:31:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-09-24 21:31:35,766 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 36 [2020-09-24 21:31:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:35,767 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-09-24 21:31:35,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:31:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-09-24 21:31:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:31:35,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:35,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:35,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:31:35,770 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:35,770 INFO L82 PathProgramCache]: Analyzing trace with hash 594320754, now seen corresponding path program 1 times [2020-09-24 21:31:35,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:35,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183153921] [2020-09-24 21:31:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:35,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:35,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:36,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 21:31:36,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-09-24 21:31:36,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:31:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-24 21:31:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:31:36,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:36,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:36,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:36,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:36,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:36,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:36,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:36,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:36,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:36,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:36,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:31:36,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:36,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:36,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 21:31:36,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:36,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-09-24 21:31:36,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:31:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 21:31:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:31:36,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:36,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:36,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:36,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:36,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:31:36,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-24 21:31:36,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:31:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:31:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 21:31:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:36,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:36,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:36,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:36,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:31:36,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:36,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:31:36,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:31:36,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 21:31:36,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183153921] [2020-09-24 21:31:36,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:31:36,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 21:31:36,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937674809] [2020-09-24 21:31:36,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:31:36,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:31:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:31:36,736 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 10 states. [2020-09-24 21:31:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:36,981 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-09-24 21:31:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:31:36,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-09-24 21:31:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:36,983 INFO L225 Difference]: With dead ends: 76 [2020-09-24 21:31:36,983 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 21:31:36,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:31:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 21:31:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-09-24 21:31:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 21:31:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-09-24 21:31:36,991 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 46 [2020-09-24 21:31:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:36,992 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-09-24 21:31:36,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:31:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-09-24 21:31:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:31:36,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:36,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:36,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:31:36,994 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1010225367, now seen corresponding path program 1 times [2020-09-24 21:31:36,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:36,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350720658] [2020-09-24 21:31:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:37,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:37,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:37,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:37,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:37,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:41,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:41,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:31:41,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:31:41,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4539 [2020-09-24 21:31:41,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:31:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:31:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 21:31:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:41,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:41,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:41,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:41,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:41,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:41,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:41,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:41,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:41,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:41,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:41,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:41,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:41,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:41,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:31:41,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:41,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-09-24 21:31:41,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:41,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:31:41,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:41,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:31:41,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:41,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:41,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:41,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:41,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:31:41,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:41,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-24 21:31:41,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:41,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:31:41,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:41,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:31:41,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:42,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:42,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:42,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:42,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:31:42,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:42,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:31:42,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:42,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:42,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:42,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:42,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 21:31:42,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350720658] [2020-09-24 21:31:42,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:42,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:31:42,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520072978] [2020-09-24 21:31:42,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:31:42,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:31:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:31:42,160 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 14 states. [2020-09-24 21:31:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:42,498 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-09-24 21:31:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:31:42,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-09-24 21:31:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:42,501 INFO L225 Difference]: With dead ends: 63 [2020-09-24 21:31:42,501 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 21:31:42,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:31:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 21:31:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-09-24 21:31:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 21:31:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-09-24 21:31:42,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 47 [2020-09-24 21:31:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:42,514 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-09-24 21:31:42,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:31:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-09-24 21:31:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:31:42,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:42,518 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:42,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:31:42,518 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:42,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1466875377, now seen corresponding path program 2 times [2020-09-24 21:31:42,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:42,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151385820] [2020-09-24 21:31:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:42,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:42,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:42,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:42,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:42,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:42,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:42,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:43,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:45,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:45,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:31:45,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:31:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3160 [2020-09-24 21:31:45,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:45,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:31:45,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:31:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 21:31:45,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:45,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:45,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:45,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:45,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:45,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:45,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:45,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:45,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:45,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:45,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:45,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:45,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:45,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:31:45,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:45,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-09-24 21:31:45,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:45,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:31:45,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:45,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:31:45,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:45,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:46,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:46,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:46,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:31:46,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-24 21:31:46,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:31:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:46,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:31:46,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:46,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:46,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:46,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:31:46,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:46,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 21:31:46,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 21:31:46,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151385820] [2020-09-24 21:31:46,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:46,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:31:46,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055861412] [2020-09-24 21:31:46,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:31:46,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:31:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:31:46,257 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 12 states. [2020-09-24 21:31:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:46,520 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-09-24 21:31:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 21:31:46,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-24 21:31:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:46,521 INFO L225 Difference]: With dead ends: 68 [2020-09-24 21:31:46,522 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 21:31:46,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:31:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 21:31:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-09-24 21:31:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 21:31:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-09-24 21:31:46,542 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 47 [2020-09-24 21:31:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:46,542 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-09-24 21:31:46,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:31:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-09-24 21:31:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:31:46,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:46,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:46,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:31:46,546 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash 628814935, now seen corresponding path program 2 times [2020-09-24 21:31:46,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:46,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780955957] [2020-09-24 21:31:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:46,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:46,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:47,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:47,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:49,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:49,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:31:49,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:31:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2703 [2020-09-24 21:31:49,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:31:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:31:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 21:31:49,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:49,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:49,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:49,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:49,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:49,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:49,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:49,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:49,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:49,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:49,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:49,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:49,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:50,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:50,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:50,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:31:50,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:31:50,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1317 [2020-09-24 21:31:50,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:31:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:31:50,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:50,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:50,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:50,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:50,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:31:50,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:50,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-24 21:31:50,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:50,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:31:50,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:50,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:31:50,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:50,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:50,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:50,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:31:50,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:50,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:31:50,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:50,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:50,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:50,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 21:31:50,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780955957] [2020-09-24 21:31:50,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:50,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:31:50,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027781820] [2020-09-24 21:31:50,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:31:50,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:50,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:31:50,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:31:50,918 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 13 states. [2020-09-24 21:31:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:51,360 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-09-24 21:31:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:31:51,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-09-24 21:31:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:51,361 INFO L225 Difference]: With dead ends: 68 [2020-09-24 21:31:51,362 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 21:31:51,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:31:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 21:31:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-09-24 21:31:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 21:31:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-09-24 21:31:51,369 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 47 [2020-09-24 21:31:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:51,369 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-09-24 21:31:51,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:31:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-09-24 21:31:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:31:51,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:51,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:51,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:31:51,371 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash -609776486, now seen corresponding path program 3 times [2020-09-24 21:31:51,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:51,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550908603] [2020-09-24 21:31:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:51,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:51,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:52,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:52,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:52,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:56,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:56,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 21:31:56,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:31:56,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-24 21:31:56,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:56,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:31:56,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:31:56,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:31:56,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:56,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:56,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:56,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:56,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:56,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:56,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:56,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:56,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:56,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:56,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:31:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:56,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:56,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:56,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:31:56,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-09-24 21:31:56,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:56,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 21:31:56,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:31:56,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:56,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:56,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:57,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:57,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:31:57,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:57,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-09-24 21:31:57,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:31:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:31:57,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:57,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:57,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:57,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:57,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:31:57,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:57,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-24 21:31:57,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:57,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:31:57,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:57,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:31:57,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:57,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:31:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:57,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:57,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:57,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:31:57,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:57,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:31:57,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:57,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:57,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:57,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:57,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:31:57,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550908603] [2020-09-24 21:31:57,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:57,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:31:57,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369645656] [2020-09-24 21:31:57,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:31:57,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:31:57,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:31:57,495 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 17 states. [2020-09-24 21:31:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:57,978 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-09-24 21:31:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:31:57,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-09-24 21:31:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:57,980 INFO L225 Difference]: With dead ends: 73 [2020-09-24 21:31:57,980 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 21:31:57,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:31:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 21:31:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-09-24 21:31:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 21:31:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-09-24 21:31:57,987 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 58 [2020-09-24 21:31:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:57,988 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-09-24 21:31:57,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:31:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-09-24 21:31:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:31:57,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:57,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:57,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:31:57,989 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash -925145612, now seen corresponding path program 4 times [2020-09-24 21:31:57,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:57,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744539372] [2020-09-24 21:31:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:58,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:59,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:03,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:03,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 21:32:03,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:32:03,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:32:03,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:32:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:32:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:32:03,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:03,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:32:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:03,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:03,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:03,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:32:03,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:03,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:32:03,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:32:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:32:03,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:03,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:32:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:03,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:03,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:03,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:32:03,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:03,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-09-24 21:32:03,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:03,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 21:32:03,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:03,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:32:03,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:03,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:32:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:03,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:03,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:03,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:32:03,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:03,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-09-24 21:32:03,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:32:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:32:03,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:03,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:32:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:03,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:03,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:03,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:32:03,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:03,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 21:32:03,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:03,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:32:03,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:03,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:32:03,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:03,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:32:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:03,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:03,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:03,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:32:03,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:03,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 21:32:03,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:32:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:32:03,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:32:03,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744539372] [2020-09-24 21:32:03,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:32:03,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:32:03,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458858397] [2020-09-24 21:32:03,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:32:03,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:32:03,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:32:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:32:03,945 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 17 states. [2020-09-24 21:32:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:32:04,475 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-09-24 21:32:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:32:04,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-09-24 21:32:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:32:04,477 INFO L225 Difference]: With dead ends: 76 [2020-09-24 21:32:04,477 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 21:32:04,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:32:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 21:32:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-09-24 21:32:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-24 21:32:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-09-24 21:32:04,486 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 58 [2020-09-24 21:32:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:32:04,486 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-09-24 21:32:04,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:32:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-09-24 21:32:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:32:04,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:32:04,488 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:32:04,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:32:04,488 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:32:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:32:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash 304923956, now seen corresponding path program 5 times [2020-09-24 21:32:04,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:32:04,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162617035] [2020-09-24 21:32:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:32:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:04,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:04,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:04,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:05,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:05,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:05,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:05,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:05,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:09,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:09,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 21:32:09,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:32:09,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:32:09,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 21:32:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:32:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:32:09,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:09,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:32:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:09,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:09,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:09,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:32:09,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:09,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:32:09,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:09,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:32:09,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:09,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:32:09,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:09,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:32:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:09,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:09,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:09,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:32:09,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-09-24 21:32:09,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:09,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:32:09,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:09,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:32:09,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:09,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:32:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:09,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:10,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:10,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:32:10,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:10,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-24 21:32:10,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:10,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:32:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:32:10,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:10,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:32:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:10,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:10,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:10,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:32:10,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 21:32:10,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:32:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:32:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:10,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:32:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:10,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:10,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:32:10,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:10,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 21:32:10,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:32:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:32:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 21:32:10,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162617035] [2020-09-24 21:32:10,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:32:10,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:32:10,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256894885] [2020-09-24 21:32:10,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:32:10,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:32:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:32:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:32:10,322 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 14 states. [2020-09-24 21:32:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:32:10,772 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-09-24 21:32:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:32:10,773 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-09-24 21:32:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:32:10,774 INFO L225 Difference]: With dead ends: 76 [2020-09-24 21:32:10,774 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 21:32:10,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:32:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 21:32:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-24 21:32:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 21:32:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-09-24 21:32:10,784 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 58 [2020-09-24 21:32:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:32:10,784 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-09-24 21:32:10,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:32:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-09-24 21:32:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:32:10,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:32:10,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:32:10,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:32:10,786 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:32:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:32:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1641975180, now seen corresponding path program 3 times [2020-09-24 21:32:10,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:32:10,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66714595] [2020-09-24 21:32:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:32:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:10,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:10,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:10,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:11,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:11,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:11,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:11,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:15,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:15,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 21:32:15,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:32:15,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:32:15,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:15,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:32:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:32:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:32:15,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:32:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:15,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:15,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:15,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:32:15,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:15,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:32:15,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:15,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:32:15,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:15,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:32:15,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:15,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:32:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:15,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:32:16,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:32:16,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:32:16,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:32:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-09-24 21:32:16,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:32:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 21:32:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:32:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:32:16,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:32:16,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 21:32:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:32:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking...