/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res2o.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:07:49,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:07:49,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:07:49,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:07:49,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:07:49,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:07:49,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:07:49,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:07:49,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:07:49,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:07:49,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:07:49,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:07:49,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:07:49,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:07:49,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:07:49,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:07:49,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:07:49,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:07:49,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:07:49,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:07:49,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:07:49,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:07:49,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:07:49,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:07:49,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:07:49,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:07:49,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:07:49,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:07:49,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:07:49,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:07:49,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:07:49,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:07:49,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:07:49,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:07:49,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:07:49,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:07:49,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:07:49,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:07:49,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:07:49,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:07:49,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:07:49,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:07:49,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:07:49,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:07:49,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:07:49,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:07:49,411 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:07:49,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:07:49,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:07:49,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:07:49,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:07:49,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:07:49,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:07:49,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:07:49,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:07:49,414 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:07:49,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:07:49,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:07:49,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:07:49,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:07:49,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:07:49,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:07:49,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:07:49,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:07:49,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:07:49,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:07:49,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:07:49,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:07:49,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:07:49,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:07:49,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:07:49,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:07:49,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:07:49,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:07:49,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:07:49,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:07:49,711 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:07:49,712 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2o.c [2020-10-13 05:07:49,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecae480f9/8a49bc0a2af145c4a29732f3746da32b/FLAGdcc5deeef [2020-10-13 05:07:50,225 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:07:50,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2o.c [2020-10-13 05:07:50,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecae480f9/8a49bc0a2af145c4a29732f3746da32b/FLAGdcc5deeef [2020-10-13 05:07:50,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecae480f9/8a49bc0a2af145c4a29732f3746da32b [2020-10-13 05:07:50,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:07:50,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:07:50,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:50,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:07:50,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:07:50,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:50,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6256357c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50, skipping insertion in model container [2020-10-13 05:07:50,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:50,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:07:50,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:07:50,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:50,828 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:07:50,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:50,870 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:07:50,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50 WrapperNode [2020-10-13 05:07:50,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:50,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:07:50,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:07:50,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:07:50,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:50,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:50,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:50,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:50,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:51,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:51,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... [2020-10-13 05:07:51,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:07:51,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:07:51,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:07:51,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:07:51,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:07:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:07:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:07:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:07:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:07:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:07:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:07:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:07:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:07:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:07:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:07:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:07:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:07:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:07:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:07:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:07:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:07:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:07:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:07:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:07:51,542 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:07:51,542 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 05:07:51,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:51 BoogieIcfgContainer [2020-10-13 05:07:51,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:07:51,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:07:51,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:07:51,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:07:51,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:07:50" (1/3) ... [2020-10-13 05:07:51,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dae27cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:51, skipping insertion in model container [2020-10-13 05:07:51,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:50" (2/3) ... [2020-10-13 05:07:51,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dae27cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:51, skipping insertion in model container [2020-10-13 05:07:51,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:51" (3/3) ... [2020-10-13 05:07:51,562 INFO L109 eAbstractionObserver]: Analyzing ICFG res2o.c [2020-10-13 05:07:51,571 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:07:51,577 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:07:51,590 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:07:51,614 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:07:51,614 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:07:51,615 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:07:51,615 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:07:51,615 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:07:51,615 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:07:51,615 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:07:51,615 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:07:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-13 05:07:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:07:51,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:51,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:51,644 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:51,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-10-13 05:07:51,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:51,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162338094] [2020-10-13 05:07:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:51,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:53,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:07:53,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:07:53,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1344 [2020-10-13 05:07:53,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:07:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:53,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:07:53,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:53,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:53,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:07:53,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:53,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:53,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:53,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:53,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:53,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:53,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:07:53,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:53,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:53,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:53,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162338094] [2020-10-13 05:07:53,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:53,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:07:53,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781923541] [2020-10-13 05:07:53,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:07:53,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:07:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:53,324 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-13 05:07:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:53,488 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-10-13 05:07:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:07:53,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 05:07:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:53,500 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:07:53,500 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 05:07:53,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 05:07:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 05:07:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 05:07:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-13 05:07:53,560 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-10-13 05:07:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:53,560 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-13 05:07:53,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:07:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-13 05:07:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:07:53,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:53,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:53,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:07:53,567 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash 120259143, now seen corresponding path program 1 times [2020-10-13 05:07:53,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:53,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338625378] [2020-10-13 05:07:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:57,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:07:57,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:07:57,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3448 [2020-10-13 05:07:57,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:57,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:07:57,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:07:57,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:57,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:57,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:57,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:57,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:57,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:57,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:57,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:57,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:57,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:57,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:57,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:57,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:57,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:57,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:57,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:07:57,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:57,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338625378] [2020-10-13 05:07:57,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:57,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:07:57,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959707855] [2020-10-13 05:07:57,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:07:57,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:57,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:07:57,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:07:57,119 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-10-13 05:07:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:57,341 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-13 05:07:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:07:57,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-13 05:07:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:57,344 INFO L225 Difference]: With dead ends: 69 [2020-10-13 05:07:57,344 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:07:57,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:07:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:07:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-13 05:07:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:07:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-13 05:07:57,355 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-10-13 05:07:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:57,356 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-13 05:07:57,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:07:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-13 05:07:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:07:57,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:57,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:57,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:07:57,358 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-10-13 05:07:57,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:57,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922589776] [2020-10-13 05:07:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:57,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:08:02,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:08:02,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 05:08:02,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:08:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:08:02,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:03,110 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-13 05:08:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:04,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:04,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:04,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:04,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:08:04,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:04,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:04,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:04,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:04,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:04,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:04,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:04,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:04,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:04,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:04,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:08:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:04,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922589776] [2020-10-13 05:08:04,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:04,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:08:04,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320923153] [2020-10-13 05:08:04,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:08:04,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:04,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:08:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:08:04,372 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2020-10-13 05:08:04,834 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 05:08:05,043 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-13 05:08:05,245 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-13 05:08:05,598 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-13 05:08:05,803 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-13 05:08:06,032 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 05:08:06,369 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-13 05:08:06,849 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-13 05:08:07,178 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-13 05:08:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:07,608 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-13 05:08:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:08:07,609 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-10-13 05:08:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:07,610 INFO L225 Difference]: With dead ends: 72 [2020-10-13 05:08:07,610 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:08:07,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:08:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:08:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-13 05:08:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:08:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-13 05:08:07,623 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 41 [2020-10-13 05:08:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:07,624 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-13 05:08:07,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:08:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-13 05:08:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:08:07,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:07,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:07,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:08:07,626 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1819715733, now seen corresponding path program 2 times [2020-10-13 05:08:07,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:07,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256050325] [2020-10-13 05:08:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:12,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:08:12,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:12,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:08:12,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:08:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:08:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:08:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:12,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:12,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:12,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:12,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:12,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:12,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:12,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:12,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:12,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:12,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:12,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:12,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:12,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:12,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:08:12,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256050325] [2020-10-13 05:08:12,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:12,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:08:12,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240404349] [2020-10-13 05:08:12,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:08:12,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:08:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:08:12,717 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 8 states. [2020-10-13 05:08:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:13,017 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2020-10-13 05:08:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:08:13,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-13 05:08:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:13,019 INFO L225 Difference]: With dead ends: 139 [2020-10-13 05:08:13,020 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:08:13,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:08:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:08:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2020-10-13 05:08:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:08:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-13 05:08:13,041 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 43 [2020-10-13 05:08:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:13,042 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-13 05:08:13,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:08:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-13 05:08:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:08:13,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:13,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:13,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:08:13,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:13,048 INFO L82 PathProgramCache]: Analyzing trace with hash -865771691, now seen corresponding path program 3 times [2020-10-13 05:08:13,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:13,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987675357] [2020-10-13 05:08:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:13,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:18,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:08:18,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:08:18,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:08:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:18,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:08:18,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:18,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:18,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:18,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:18,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:18,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:18,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:18,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:18,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:18,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:18,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:18,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:18,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:18,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:18,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:18,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:18,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:18,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:08:18,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987675357] [2020-10-13 05:08:18,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:18,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:08:18,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947378284] [2020-10-13 05:08:18,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:08:18,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:18,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:08:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:08:18,137 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 8 states. [2020-10-13 05:08:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:18,394 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-10-13 05:08:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:08:18,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-13 05:08:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:18,396 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:08:18,396 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:08:18,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:08:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:08:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 05:08:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:08:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-13 05:08:18,410 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 43 [2020-10-13 05:08:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:18,412 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-13 05:08:18,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:08:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-13 05:08:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:08:18,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:18,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:18,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:08:18,414 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1021500449, now seen corresponding path program 4 times [2020-10-13 05:08:18,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:18,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670495877] [2020-10-13 05:08:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:18,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:21,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:22,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:23,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:08:23,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:08:23,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:08:23,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:23,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:08:23,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:23,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:08:23,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:24,023 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-13 05:08:24,161 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-13 05:08:24,292 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-13 05:08:24,459 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-13 05:08:24,626 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-13 05:08:24,826 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-13 05:08:25,043 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-13 05:08:25,232 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-13 05:08:25,457 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-10-13 05:08:25,736 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-13 05:08:26,001 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-13 05:08:26,261 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-13 05:08:26,499 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-13 05:08:26,841 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-13 05:08:27,088 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-13 05:08:27,319 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-13 05:08:27,490 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-13 05:08:27,690 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-10-13 05:08:28,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:28,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:28,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:28,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:28,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:28,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:28,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:28,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:28,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:28,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:28,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:28,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:28,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:28,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:28,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:28,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:28,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670495877] [2020-10-13 05:08:28,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:28,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:08:28,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417755066] [2020-10-13 05:08:28,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:08:28,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:08:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:08:28,866 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 34 states. [2020-10-13 05:08:29,291 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-13 05:08:29,652 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-13 05:08:29,962 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-13 05:08:30,418 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2020-10-13 05:08:30,782 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-13 05:08:31,144 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2020-10-13 05:08:31,508 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-13 05:08:31,846 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-13 05:08:32,111 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-13 05:08:32,365 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-13 05:08:32,760 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 68 [2020-10-13 05:08:32,973 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-13 05:08:33,497 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2020-10-13 05:08:34,142 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 80 [2020-10-13 05:08:34,422 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-13 05:08:34,765 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-13 05:08:35,279 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 79 [2020-10-13 05:08:35,761 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 77 [2020-10-13 05:08:36,389 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 97 [2020-10-13 05:08:36,787 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-13 05:08:37,047 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-13 05:08:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:38,078 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-10-13 05:08:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:08:38,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 53 [2020-10-13 05:08:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:38,083 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:08:38,083 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 05:08:38,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=545, Invalid=3361, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 05:08:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 05:08:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-13 05:08:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:08:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-13 05:08:38,096 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 53 [2020-10-13 05:08:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:38,097 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-13 05:08:38,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:08:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-13 05:08:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:08:38,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:38,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:38,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:08:38,099 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash 526443745, now seen corresponding path program 5 times [2020-10-13 05:08:38,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:38,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206458678] [2020-10-13 05:08:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:43,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:08:43,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:08:43,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:08:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:08:43,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:43,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:43,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:43,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:43,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:43,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:43,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:43,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:43,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:43,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:08:43,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206458678] [2020-10-13 05:08:43,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:43,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:43,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129033700] [2020-10-13 05:08:43,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:43,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:43,248 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 10 states. [2020-10-13 05:08:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:43,661 INFO L93 Difference]: Finished difference Result 181 states and 206 transitions. [2020-10-13 05:08:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:08:43,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-13 05:08:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:43,663 INFO L225 Difference]: With dead ends: 181 [2020-10-13 05:08:43,663 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 05:08:43,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:08:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 05:08:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2020-10-13 05:08:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:08:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-13 05:08:43,675 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 55 [2020-10-13 05:08:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:43,676 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-13 05:08:43,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-13 05:08:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:08:43,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:43,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:43,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:08:43,678 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:43,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1397224415, now seen corresponding path program 6 times [2020-10-13 05:08:43,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:43,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978150556] [2020-10-13 05:08:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:43,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:45,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:48,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:08:48,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:48,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:08:48,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:08:48,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:48,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:48,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:48,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:48,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:48,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:48,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:48,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:48,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:48,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:48,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:48,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:48,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:48,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:08:48,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978150556] [2020-10-13 05:08:48,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:48,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:48,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989715985] [2020-10-13 05:08:48,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:48,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:48,782 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2020-10-13 05:08:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:49,166 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-10-13 05:08:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:08:49,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-13 05:08:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:49,168 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:08:49,168 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:08:49,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:08:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:08:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 05:08:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:08:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 05:08:49,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 55 [2020-10-13 05:08:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:49,178 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 05:08:49,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 05:08:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:08:49,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:49,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:49,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:08:49,180 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash 739017131, now seen corresponding path program 7 times [2020-10-13 05:08:49,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:49,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137544773] [2020-10-13 05:08:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:49,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:51,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:54,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:08:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:54,857 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-13 05:08:54,984 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-13 05:08:55,136 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-13 05:08:55,267 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-13 05:08:55,410 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-13 05:08:55,603 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-13 05:08:55,799 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-13 05:08:56,010 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-10-13 05:08:56,226 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-13 05:08:56,474 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-13 05:08:56,689 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-13 05:08:56,960 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-10-13 05:08:57,227 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-10-13 05:08:57,510 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2020-10-13 05:08:57,785 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2020-10-13 05:08:58,238 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 83 [2020-10-13 05:08:58,564 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2020-10-13 05:08:58,855 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 84 [2020-10-13 05:08:59,208 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-13 05:08:59,570 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2020-10-13 05:08:59,819 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-13 05:09:00,069 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-13 05:09:00,370 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-13 05:09:00,618 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-13 05:09:00,880 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-13 05:09:01,100 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-13 05:09:01,392 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2020-10-13 05:09:01,616 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-13 05:09:01,832 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-13 05:09:02,237 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-13 05:09:02,628 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-13 05:09:03,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:03,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:03,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:03,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:03,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:03,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:03,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:03,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:03,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:03,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:03,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:03,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:03,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:03,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:03,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:03,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:03,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:03,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:03,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:03,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:03,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:03,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:03,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137544773] [2020-10-13 05:09:03,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:03,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:09:03,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366880670] [2020-10-13 05:09:03,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:09:03,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:09:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:09:03,737 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 46 states. [2020-10-13 05:09:04,804 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2020-10-13 05:09:05,037 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-13 05:09:05,308 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-13 05:09:05,622 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-13 05:09:06,015 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-10-13 05:09:06,455 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 95 [2020-10-13 05:09:06,965 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2020-10-13 05:09:07,218 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-13 05:09:07,527 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-13 05:09:07,815 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-13 05:09:08,100 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2020-10-13 05:09:08,502 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-10-13 05:09:08,880 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 67 [2020-10-13 05:09:09,322 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 67 [2020-10-13 05:09:09,530 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 05:09:09,824 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-13 05:09:10,269 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2020-10-13 05:09:10,776 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2020-10-13 05:09:11,343 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 101 [2020-10-13 05:09:11,979 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 119 [2020-10-13 05:09:12,496 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 99 [2020-10-13 05:09:12,912 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 75 [2020-10-13 05:09:13,451 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-10-13 05:09:13,918 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-13 05:09:14,569 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 116 [2020-10-13 05:09:15,056 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 84 [2020-10-13 05:09:15,577 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2020-10-13 05:09:16,182 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 91 [2020-10-13 05:09:16,694 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 87 [2020-10-13 05:09:17,411 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 116 [2020-10-13 05:09:18,166 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 118 [2020-10-13 05:09:18,734 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 103 [2020-10-13 05:09:19,237 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 85 [2020-10-13 05:09:19,713 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 90 [2020-10-13 05:09:20,367 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 110 [2020-10-13 05:09:20,935 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2020-10-13 05:09:21,386 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 90 [2020-10-13 05:09:22,255 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 124 [2020-10-13 05:09:22,676 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-13 05:09:23,469 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 105 [2020-10-13 05:09:23,864 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2020-10-13 05:09:24,271 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-10-13 05:09:24,607 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-13 05:09:25,529 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 98 [2020-10-13 05:09:26,062 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 96 [2020-10-13 05:09:26,576 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2020-10-13 05:09:26,975 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-13 05:09:27,740 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 108 [2020-10-13 05:09:28,097 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-13 05:09:28,608 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 81 [2020-10-13 05:09:28,837 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-13 05:09:29,355 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 75 [2020-10-13 05:09:29,777 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 71 [2020-10-13 05:09:30,195 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-10-13 05:09:30,663 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 69 [2020-10-13 05:09:31,185 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2020-10-13 05:09:31,704 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2020-10-13 05:09:32,344 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2020-10-13 05:09:32,903 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2020-10-13 05:09:33,192 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-13 05:09:33,674 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2020-10-13 05:09:34,092 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-13 05:09:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:34,850 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-10-13 05:09:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-13 05:09:34,851 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 65 [2020-10-13 05:09:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:34,853 INFO L225 Difference]: With dead ends: 116 [2020-10-13 05:09:34,853 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 05:09:34,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3841 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=1408, Invalid=12398, Unknown=0, NotChecked=0, Total=13806 [2020-10-13 05:09:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 05:09:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-13 05:09:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:09:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-13 05:09:34,870 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 65 [2020-10-13 05:09:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:34,871 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-13 05:09:34,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:09:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-13 05:09:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:09:34,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:34,872 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:34,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:09:34,873 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash -116183123, now seen corresponding path program 8 times [2020-10-13 05:09:34,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:34,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016416041] [2020-10-13 05:09:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:34,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:35,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:39,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:39,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:09:39,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:39,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:09:39,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:09:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:09:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:09:39,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:40,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:40,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:40,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:40,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:40,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:40,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:40,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:40,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:40,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:40,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:40,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:40,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:40,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:40,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:40,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:40,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:40,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:40,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:40,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:40,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:09:40,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016416041] [2020-10-13 05:09:40,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:40,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:09:40,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824543477] [2020-10-13 05:09:40,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:09:40,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:09:40,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:09:40,075 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 12 states. [2020-10-13 05:09:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:40,760 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2020-10-13 05:09:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:09:40,761 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-13 05:09:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:40,763 INFO L225 Difference]: With dead ends: 191 [2020-10-13 05:09:40,763 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 05:09:40,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:09:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 05:09:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2020-10-13 05:09:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 05:09:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-13 05:09:40,778 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 67 [2020-10-13 05:09:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:40,779 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-13 05:09:40,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:09:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-13 05:09:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:09:40,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:40,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:40,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:09:40,781 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:40,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1514794831, now seen corresponding path program 9 times [2020-10-13 05:09:40,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:40,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222496107] [2020-10-13 05:09:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:40,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:40,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:45,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:45,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:09:45,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:09:45,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:09:45,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:09:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 05:09:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:09:45,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:45,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:45,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:45,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:45,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:45,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:09:45,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:45,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:45,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:45,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:45,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:45,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:45,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:45,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:45,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:45,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:45,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:45,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:09:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 05:09:45,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222496107] [2020-10-13 05:09:45,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:45,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:09:45,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620566915] [2020-10-13 05:09:45,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:09:45,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:09:45,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:09:45,961 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 12 states. [2020-10-13 05:09:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:46,858 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-10-13 05:09:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:09:46,860 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-13 05:09:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:46,861 INFO L225 Difference]: With dead ends: 100 [2020-10-13 05:09:46,861 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 05:09:46,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:09:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 05:09:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 05:09:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 05:09:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-13 05:09:46,891 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 71 [2020-10-13 05:09:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:46,893 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-13 05:09:46,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:09:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-13 05:09:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:09:46,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:46,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:46,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:09:46,901 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1709261449, now seen corresponding path program 10 times [2020-10-13 05:09:46,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:46,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939118177] [2020-10-13 05:09:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:47,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:48,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:51,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:52,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:52,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:09:52,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5855 [2020-10-13 05:09:52,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 05:09:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:09:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:53,420 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-13 05:09:53,755 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-13 05:09:53,974 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-13 05:09:54,370 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-13 05:09:54,668 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-13 05:09:54,892 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-13 05:09:55,155 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-13 05:09:55,469 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-13 05:09:55,781 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-13 05:09:56,263 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2020-10-13 05:09:56,755 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-13 05:09:57,184 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-13 05:09:57,694 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-13 05:09:58,112 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-13 05:09:58,507 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-13 05:09:59,042 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2020-10-13 05:09:59,723 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-13 05:10:00,409 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2020-10-13 05:10:00,776 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-13 05:10:01,208 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2020-10-13 05:10:01,769 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2020-10-13 05:10:02,281 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 90 [2020-10-13 05:10:02,769 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 90 [2020-10-13 05:10:03,365 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2020-10-13 05:10:03,901 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-13 05:10:04,530 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-10-13 05:10:04,848 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-13 05:10:05,323 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-13 05:10:05,685 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-13 05:10:06,441 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-10-13 05:10:06,907 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-13 05:10:07,296 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-13 05:10:07,578 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-13 05:10:07,865 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-13 05:10:08,085 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-13 05:10:08,376 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-13 05:10:08,884 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 05:10:09,379 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-13 05:10:11,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:12,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:12,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:12,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:12,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:12,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:12,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939118177] [2020-10-13 05:10:12,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:12,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 05:10:12,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38248046] [2020-10-13 05:10:12,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 05:10:12,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 05:10:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2917, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:10:12,095 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 57 states. [2020-10-13 05:10:12,877 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-13 05:10:13,176 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-10-13 05:10:13,519 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-13 05:10:14,177 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 94 [2020-10-13 05:10:14,838 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2020-10-13 05:10:15,459 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 98 [2020-10-13 05:10:15,982 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 77 [2020-10-13 05:10:16,449 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-13 05:10:17,122 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-10-13 05:10:17,506 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-13 05:10:17,955 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 63 [2020-10-13 05:10:18,442 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 71 [2020-10-13 05:10:19,136 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 76 [2020-10-13 05:10:19,841 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 75 [2020-10-13 05:10:20,459 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 75 [2020-10-13 05:10:21,190 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 76 [2020-10-13 05:10:21,687 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2020-10-13 05:10:22,392 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 81 [2020-10-13 05:10:22,868 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-13 05:10:24,066 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 116 [2020-10-13 05:10:24,600 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2020-10-13 05:10:25,256 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 90 [2020-10-13 05:10:25,576 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-13 05:10:26,275 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 88 [2020-10-13 05:10:26,695 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-13 05:10:27,098 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-13 05:10:28,162 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 87 [2020-10-13 05:10:29,500 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 88 [2020-10-13 05:10:29,969 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 69 [2020-10-13 05:10:31,054 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 90 [2020-10-13 05:10:31,534 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2020-10-13 05:10:32,584 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 89 [2020-10-13 05:10:33,105 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2020-10-13 05:10:34,411 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 93 [2020-10-13 05:10:35,328 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 90 [2020-10-13 05:10:36,763 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 87 [2020-10-13 05:10:37,924 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 95 [2020-10-13 05:10:38,864 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 91 [2020-10-13 05:10:40,393 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 239 DAG size of output: 145 [2020-10-13 05:10:42,471 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 213 DAG size of output: 151 [2020-10-13 05:10:47,466 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 233 DAG size of output: 164 [2020-10-13 05:10:47,992 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2020-10-13 05:10:49,816 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 168 DAG size of output: 144 [2020-10-13 05:10:50,473 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 88 [2020-10-13 05:10:52,178 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 204 DAG size of output: 146 [2020-10-13 05:10:52,908 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 95 [2020-10-13 05:10:53,498 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 98 [2020-10-13 05:10:54,552 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 125 [2020-10-13 05:10:55,211 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2020-10-13 05:10:55,938 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-13 05:10:56,585 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2020-10-13 05:10:57,185 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-13 05:10:57,615 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-13 05:10:57,906 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-13 05:10:58,288 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-13 05:11:00,097 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 05:11:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:00,665 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-10-13 05:11:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-13 05:11:00,667 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 77 [2020-10-13 05:11:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:00,668 INFO L225 Difference]: With dead ends: 132 [2020-10-13 05:11:00,668 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 05:11:00,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3764 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=1636, Invalid=12644, Unknown=0, NotChecked=0, Total=14280 [2020-10-13 05:11:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 05:11:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2020-10-13 05:11:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 05:11:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-10-13 05:11:00,692 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 77 [2020-10-13 05:11:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:00,692 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-10-13 05:11:00,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 05:11:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-10-13 05:11:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:11:00,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:00,694 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:00,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:11:00,694 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:00,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1248536455, now seen corresponding path program 11 times [2020-10-13 05:11:00,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:00,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165732741] [2020-10-13 05:11:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:00,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:01,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:05,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:11:05,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:11:05,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:11:05,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:11:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 05:11:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:11:05,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:05,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:05,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:05,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:05,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:05,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:05,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:05,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:05,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:05,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:05,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:05,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:05,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:05,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:05,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:05,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:05,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:05,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:05,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:05,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 05:11:05,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165732741] [2020-10-13 05:11:05,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:05,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:11:05,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008467492] [2020-10-13 05:11:05,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:11:05,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:11:05,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:05,995 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 14 states. [2020-10-13 05:11:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:07,110 INFO L93 Difference]: Finished difference Result 235 states and 257 transitions. [2020-10-13 05:11:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:11:07,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-13 05:11:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:07,113 INFO L225 Difference]: With dead ends: 235 [2020-10-13 05:11:07,114 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 05:11:07,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:11:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 05:11:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 118. [2020-10-13 05:11:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 05:11:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2020-10-13 05:11:07,133 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 79 [2020-10-13 05:11:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:07,133 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2020-10-13 05:11:07,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:11:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2020-10-13 05:11:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:11:07,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:07,134 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:07,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:11:07,134 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:07,135 INFO L82 PathProgramCache]: Analyzing trace with hash -666160709, now seen corresponding path program 12 times [2020-10-13 05:11:07,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:07,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513455062] [2020-10-13 05:11:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:11:12,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:11:12,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:11:12,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:11:12,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:11:12,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:11:12,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:12,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:12,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:12,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:12,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:12,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:12,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:12,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:12,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:12,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:12,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:12,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:12,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:12,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:12,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:12,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-13 05:11:12,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513455062] [2020-10-13 05:11:12,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:12,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:11:12,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898092930] [2020-10-13 05:11:12,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:11:12,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:11:12,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:12,412 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand 14 states. [2020-10-13 05:11:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:13,501 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-13 05:11:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:11:13,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-13 05:11:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:13,504 INFO L225 Difference]: With dead ends: 126 [2020-10-13 05:11:13,504 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 05:11:13,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:11:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 05:11:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-13 05:11:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:11:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-13 05:11:13,520 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 81 [2020-10-13 05:11:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:13,520 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-13 05:11:13,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:11:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-13 05:11:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 05:11:13,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:13,521 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:13,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:11:13,522 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash -682436797, now seen corresponding path program 13 times [2020-10-13 05:11:13,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:13,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568705280] [2020-10-13 05:11:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:13,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:15,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:18,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 05:11:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:19,427 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-13 05:11:19,650 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 05:11:19,894 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-13 05:11:20,139 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-13 05:11:20,399 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-13 05:11:20,678 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-13 05:11:20,983 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-13 05:11:21,273 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-13 05:11:21,666 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2020-10-13 05:11:22,105 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 71 [2020-10-13 05:11:22,598 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 70 [2020-10-13 05:11:22,947 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-10-13 05:11:23,380 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 69 [2020-10-13 05:11:23,817 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 69 [2020-10-13 05:11:24,275 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 77 [2020-10-13 05:11:24,838 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 77 [2020-10-13 05:11:25,346 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 80 [2020-10-13 05:11:25,764 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-13 05:11:26,292 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 81 [2020-10-13 05:11:26,981 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-10-13 05:11:27,619 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 90 [2020-10-13 05:11:28,210 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 90 [2020-10-13 05:11:28,667 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2020-10-13 05:11:29,213 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 86 [2020-10-13 05:11:29,731 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 80 [2020-10-13 05:11:30,332 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 95 [2020-10-13 05:11:31,109 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 98 [2020-10-13 05:11:32,087 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 99 [2020-10-13 05:11:32,915 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 103 [2020-10-13 05:11:33,656 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 103 [2020-10-13 05:11:34,362 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2020-10-13 05:11:35,092 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 105 [2020-10-13 05:11:35,853 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2020-10-13 05:11:36,402 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-10-13 05:11:37,196 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2020-10-13 05:11:37,813 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-13 05:11:38,606 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-13 05:11:39,207 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-13 05:11:39,745 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2020-10-13 05:11:40,259 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-13 05:11:41,075 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-13 05:11:41,574 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-13 05:11:42,120 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-13 05:11:42,527 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-13 05:11:42,919 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-13 05:11:43,262 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-13 05:11:43,685 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59