/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:28:43,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:28:43,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:28:43,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:28:43,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:28:43,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:28:43,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:28:43,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:28:43,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:28:43,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:28:43,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:28:43,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:28:43,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:28:43,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:28:43,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:28:43,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:28:43,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:28:43,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:28:43,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:28:43,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:28:43,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:28:43,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:28:43,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:28:43,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:28:43,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:28:43,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:28:43,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:28:43,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:28:43,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:28:43,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:28:43,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:28:43,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:28:43,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:28:43,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:28:43,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:28:43,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:28:43,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:28:43,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:28:43,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:28:43,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:28:43,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:28:43,712 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 [2020-10-27 20:28:43,764 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:28:43,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:28:43,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:28:43,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:28:43,768 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:28:43,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:28:43,769 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:28:43,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:28:43,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:28:43,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:28:43,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:28:43,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:28:43,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:28:43,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:28:43,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:28:43,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:28:43,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:28:43,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:28:43,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:28:43,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:28:43,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:28:43,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:28:43,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:28:43,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:28:43,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:28:43,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:28:43,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:28:43,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:28:43,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:28:43,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:28:44,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:28:44,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:28:44,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:28:44,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:28:44,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:28:44,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-27 20:28:44,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9be23fdc1/a57ab253f9db4d8c8c1e5ea8ede8e553/FLAGa86eee7bf [2020-10-27 20:28:44,999 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:28:45,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-27 20:28:45,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9be23fdc1/a57ab253f9db4d8c8c1e5ea8ede8e553/FLAGa86eee7bf [2020-10-27 20:28:45,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9be23fdc1/a57ab253f9db4d8c8c1e5ea8ede8e553 [2020-10-27 20:28:45,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:28:45,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:28:45,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:28:45,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:28:45,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:28:45,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0b842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45, skipping insertion in model container [2020-10-27 20:28:45,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:28:45,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:28:45,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:28:45,593 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:28:45,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:28:45,626 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:28:45,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45 WrapperNode [2020-10-27 20:28:45,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:28:45,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:28:45,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:28:45,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:28:45,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (1/1) ... [2020-10-27 20:28:45,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:28:45,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:28:45,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:28:45,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:28:45,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (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 [2020-10-27 20:28:45,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:28:45,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:28:45,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:28:45,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:28:45,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:28:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:28:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:28:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:28:45,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:28:45,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:28:45,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:28:45,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:28:45,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:28:45,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:28:45,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:28:45,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:28:45,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:28:46,012 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:28:46,013 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:28:46,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:28:46 BoogieIcfgContainer [2020-10-27 20:28:46,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:28:46,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:28:46,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:28:46,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:28:46,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:28:45" (1/3) ... [2020-10-27 20:28:46,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b6f397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:28:46, skipping insertion in model container [2020-10-27 20:28:46,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:28:45" (2/3) ... [2020-10-27 20:28:46,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b6f397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:28:46, skipping insertion in model container [2020-10-27 20:28:46,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:28:46" (3/3) ... [2020-10-27 20:28:46,028 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2020-10-27 20:28:46,041 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:28:46,055 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:28:46,070 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:28:46,101 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:28:46,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:28:46,101 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:28:46,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:28:46,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:28:46,101 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:28:46,102 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:28:46,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:28:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:28:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:28:46,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:46,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:46,127 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1007641703, now seen corresponding path program 1 times [2020-10-27 20:28:46,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:46,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773677802] [2020-10-27 20:28:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:46,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:28:46,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:46,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-27 20:28:46,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:46,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:46,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:28:46,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:46,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:28:46,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:46,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:46,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:46,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:46,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:28:46,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:46,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:46,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:46,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:46,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773677802] [2020-10-27 20:28:46,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:28:46,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:28:46,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763101398] [2020-10-27 20:28:46,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:28:46,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:28:46,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:28:46,961 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:28:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:47,034 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-27 20:28:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:28:47,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:28:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:47,048 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:28:47,048 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:28:47,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:28:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:28:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:28:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:28:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-27 20:28:47,126 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2020-10-27 20:28:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:47,127 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-27 20:28:47,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:28:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-27 20:28:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:28:47,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:47,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:47,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:28:47,130 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash 722539485, now seen corresponding path program 1 times [2020-10-27 20:28:47,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:47,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786064705] [2020-10-27 20:28:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:47,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:47,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:28:47,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 20:28:47,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:28:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:28:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:28:47,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:47,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:47,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:47,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:47,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:28:47,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:47,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:47,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786064705] [2020-10-27 20:28:47,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:28:47,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:28:47,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273606023] [2020-10-27 20:28:47,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:28:47,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:47,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:28:47,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:28:47,569 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-27 20:28:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:47,649 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-27 20:28:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:28:47,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:28:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:47,651 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:28:47,651 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:28:47,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:28:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:28:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:28:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:28:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 20:28:47,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-27 20:28:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:47,660 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 20:28:47,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:28:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 20:28:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:28:47,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:47,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:47,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:28:47,662 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1836926234, now seen corresponding path program 1 times [2020-10-27 20:28:47,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:47,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224559402] [2020-10-27 20:28:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:47,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:47,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:28:47,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:28:47,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 20:28:47,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:47,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:28:47,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:47,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:28:47,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:47,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:47,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:47,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:47,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:47,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:28:47,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:47,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:47,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:47,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:47,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:47,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224559402] [2020-10-27 20:28:47,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:28:47,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:28:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078382133] [2020-10-27 20:28:47,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:28:47,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:28:47,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:28:47,818 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-27 20:28:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:47,895 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-27 20:28:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:28:47,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:28:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:47,897 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:28:47,897 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:28:47,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:28:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:28:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:28:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:28:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 20:28:47,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-27 20:28:47,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:47,905 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 20:28:47,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:28:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 20:28:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:28:47,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:47,906 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:47,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:28:47,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:47,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1788578603, now seen corresponding path program 1 times [2020-10-27 20:28:47,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:47,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379528308] [2020-10-27 20:28:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:47,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:28:48,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:48,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 20:28:48,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:28:48,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:48,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:28:48,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:48,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:48,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:48,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:28:48,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:48,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:48,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379528308] [2020-10-27 20:28:48,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:48,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:28:48,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267940622] [2020-10-27 20:28:48,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:28:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:28:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:28:48,088 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-27 20:28:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:48,200 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-27 20:28:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:28:48,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 20:28:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:48,202 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:28:48,203 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:28:48,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:28:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:28:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:28:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:28:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-27 20:28:48,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2020-10-27 20:28:48,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:48,211 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-27 20:28:48,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:28:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-27 20:28:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:28:48,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:48,212 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:48,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:28:48,212 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1614717392, now seen corresponding path program 2 times [2020-10-27 20:28:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:48,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810285010] [2020-10-27 20:28:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:48,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:28:48,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:48,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 20:28:48,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:28:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:28:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:48,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:28:48,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:48,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:48,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:48,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:48,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810285010] [2020-10-27 20:28:48,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:48,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:28:48,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62320244] [2020-10-27 20:28:48,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:28:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:28:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:28:48,451 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-27 20:28:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:48,602 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-27 20:28:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:28:48,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:28:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:48,603 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:28:48,603 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:28:48,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:28:48,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:28:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:28:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:28:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 20:28:48,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2020-10-27 20:28:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:48,610 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 20:28:48,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:28:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 20:28:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:28:48,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:48,612 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:48,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:28:48,612 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash -582910965, now seen corresponding path program 3 times [2020-10-27 20:28:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:48,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960549275] [2020-10-27 20:28:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:28:48,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:48,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 20:28:48,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:28:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:28:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:48,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:48,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:48,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:28:48,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:48,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:48,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960549275] [2020-10-27 20:28:48,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:48,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:28:48,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204726637] [2020-10-27 20:28:48,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:28:48,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:48,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:28:48,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:28:48,853 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-10-27 20:28:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:49,043 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-27 20:28:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:28:49,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:28:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:49,045 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:28:49,045 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:28:49,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:28:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:28:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 20:28:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:28:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-27 20:28:49,052 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 21 [2020-10-27 20:28:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:49,052 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-27 20:28:49,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:28:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-27 20:28:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:28:49,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:49,053 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:49,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:28:49,053 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash 620147590, now seen corresponding path program 4 times [2020-10-27 20:28:49,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:49,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549494054] [2020-10-27 20:28:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:49,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:49,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:49,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:49,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:28:49,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:49,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-27 20:28:49,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:49,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:28:49,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:49,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:28:49,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:49,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:49,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:49,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:49,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:49,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:49,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:49,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:49,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:49,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:49,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:49,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:49,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549494054] [2020-10-27 20:28:49,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:49,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:28:49,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398309115] [2020-10-27 20:28:49,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:28:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:49,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:28:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:28:49,460 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 8 states. [2020-10-27 20:28:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:49,673 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-27 20:28:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:28:49,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 20:28:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:49,675 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:28:49,675 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:28:49,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:28:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:28:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:28:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:28:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-27 20:28:49,682 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 23 [2020-10-27 20:28:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:49,682 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-27 20:28:49,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:28:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-27 20:28:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:28:49,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:49,684 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:49,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:28:49,684 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1413216321, now seen corresponding path program 5 times [2020-10-27 20:28:49,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:49,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822734736] [2020-10-27 20:28:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:49,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:28:49,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 20:28:49,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:28:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:28:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:50,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:50,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:50,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:50,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:50,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:50,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:50,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:50,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:50,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822734736] [2020-10-27 20:28:50,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:50,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:28:50,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510113159] [2020-10-27 20:28:50,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:28:50,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:50,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:28:50,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:28:50,021 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2020-10-27 20:28:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:50,314 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-27 20:28:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:28:50,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 20:28:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:50,315 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:28:50,315 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:28:50,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:28:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:28:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 20:28:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:28:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-27 20:28:50,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 25 [2020-10-27 20:28:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:50,323 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-27 20:28:50,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:28:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-27 20:28:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:28:50,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:50,325 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:50,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:28:50,325 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash -951911876, now seen corresponding path program 6 times [2020-10-27 20:28:50,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:50,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044299840] [2020-10-27 20:28:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:50,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:50,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:50,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:50,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:28:50,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:50,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-27 20:28:50,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:50,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:28:50,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:28:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:50,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:50,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:50,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:50,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:50,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:50,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:50,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044299840] [2020-10-27 20:28:50,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:50,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:28:50,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51791612] [2020-10-27 20:28:50,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:28:50,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:50,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:28:50,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:28:50,729 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 10 states. [2020-10-27 20:28:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:51,157 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2020-10-27 20:28:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:28:51,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 20:28:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:51,160 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:28:51,160 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:28:51,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:28:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:28:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 20:28:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:28:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 20:28:51,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 27 [2020-10-27 20:28:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:51,169 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 20:28:51,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:28:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 20:28:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:28:51,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:51,170 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:51,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:28:51,171 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1802409609, now seen corresponding path program 7 times [2020-10-27 20:28:51,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:51,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702219999] [2020-10-27 20:28:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:51,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:51,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:51,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:28:51,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:51,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-27 20:28:51,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:28:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:28:51,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:51,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:51,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:51,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:51,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:51,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:51,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:51,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:51,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:51,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:51,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:51,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:51,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702219999] [2020-10-27 20:28:51,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:51,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:28:51,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19438524] [2020-10-27 20:28:51,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:28:51,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:28:51,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:28:51,682 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 11 states. [2020-10-27 20:28:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:52,033 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-27 20:28:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:28:52,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 20:28:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:52,034 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:28:52,034 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:28:52,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:28:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:28:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:28:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:28:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-27 20:28:52,042 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 29 [2020-10-27 20:28:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:52,042 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-27 20:28:52,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:28:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-27 20:28:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:28:52,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:52,043 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:52,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:28:52,044 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1208022514, now seen corresponding path program 8 times [2020-10-27 20:28:52,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:52,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698497615] [2020-10-27 20:28:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:52,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:52,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:52,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:52,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:52,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:28:52,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:52,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-27 20:28:52,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:28:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:52,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:28:52,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:52,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:52,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:52,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:52,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:52,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:52,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:52,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:52,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:52,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:52,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:52,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698497615] [2020-10-27 20:28:52,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:52,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:28:52,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368270980] [2020-10-27 20:28:52,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:28:52,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:28:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:28:52,637 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 12 states. [2020-10-27 20:28:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:53,022 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-27 20:28:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:28:53,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 20:28:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:53,025 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:28:53,025 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:28:53,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:28:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:28:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 20:28:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:28:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-27 20:28:53,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 31 [2020-10-27 20:28:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:53,038 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-27 20:28:53,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:28:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-27 20:28:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:28:53,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:53,042 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:53,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:28:53,043 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash -574664787, now seen corresponding path program 9 times [2020-10-27 20:28:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:53,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100581758] [2020-10-27 20:28:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:53,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:53,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:53,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:53,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:53,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:28:53,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:53,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 20:28:53,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:28:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:28:53,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:53,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:53,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:53,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:53,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:53,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:53,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:53,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:53,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:53,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:53,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100581758] [2020-10-27 20:28:53,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:53,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:28:53,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449677180] [2020-10-27 20:28:53,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:28:53,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:28:53,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:28:53,722 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 13 states. [2020-10-27 20:28:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:54,164 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-27 20:28:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:28:54,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 20:28:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:54,165 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:28:54,165 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:28:54,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:28:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:28:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 20:28:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:28:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2020-10-27 20:28:54,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2020-10-27 20:28:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:54,180 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-10-27 20:28:54,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:28:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2020-10-27 20:28:54,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:28:54,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:54,185 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:54,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:28:54,185 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash -45209944, now seen corresponding path program 10 times [2020-10-27 20:28:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:54,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284751259] [2020-10-27 20:28:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:54,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:54,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:54,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:54,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:54,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:28:54,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:54,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-27 20:28:54,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:54,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:28:54,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:54,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:28:54,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:54,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:54,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:54,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:54,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:54,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:54,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:54,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:54,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:54,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:54,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284751259] [2020-10-27 20:28:54,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:54,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:28:54,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244390230] [2020-10-27 20:28:54,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:28:54,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:54,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:28:54,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:28:54,925 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 14 states. [2020-10-27 20:28:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:55,449 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-10-27 20:28:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:28:55,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 20:28:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:55,451 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:28:55,452 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:28:55,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:28:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:28:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 20:28:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:28:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-10-27 20:28:55,464 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 35 [2020-10-27 20:28:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:55,465 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-10-27 20:28:55,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:28:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-10-27 20:28:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:28:55,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:55,467 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:55,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:28:55,467 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:55,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1954753251, now seen corresponding path program 11 times [2020-10-27 20:28:55,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:55,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016770493] [2020-10-27 20:28:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:55,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:55,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:56,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:56,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:28:56,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:56,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-27 20:28:56,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:28:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:28:56,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:56,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:56,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:56,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:56,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:56,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:56,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:56,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:56,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:56,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:56,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:56,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:56,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016770493] [2020-10-27 20:28:56,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:56,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:28:56,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036174301] [2020-10-27 20:28:56,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:28:56,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:28:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:28:56,229 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 15 states. [2020-10-27 20:28:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:56,729 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-27 20:28:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:28:56,730 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 20:28:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:56,731 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:28:56,731 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:28:56,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:28:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:28:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 20:28:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:28:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-10-27 20:28:56,740 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 37 [2020-10-27 20:28:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:56,740 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-10-27 20:28:56,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:28:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-10-27 20:28:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:28:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:56,741 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:56,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:28:56,742 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash -225964962, now seen corresponding path program 12 times [2020-10-27 20:28:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756426120] [2020-10-27 20:28:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:56,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:56,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:57,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:57,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:28:57,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:57,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-27 20:28:57,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:28:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:28:57,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:57,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:57,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:57,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:57,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:57,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:57,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:57,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:57,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:57,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:57,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:57,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756426120] [2020-10-27 20:28:57,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:57,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:28:57,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662462576] [2020-10-27 20:28:57,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:28:57,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:57,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:28:57,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:28:57,521 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 16 states. [2020-10-27 20:28:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:58,120 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-10-27 20:28:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:28:58,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 20:28:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:58,121 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:28:58,121 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:28:58,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:28:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:28:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 20:28:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:28:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2020-10-27 20:28:58,136 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 39 [2020-10-27 20:28:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:58,137 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2020-10-27 20:28:58,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:28:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2020-10-27 20:28:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:28:58,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:58,138 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:58,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:28:58,139 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:58,139 INFO L82 PathProgramCache]: Analyzing trace with hash 47872793, now seen corresponding path program 13 times [2020-10-27 20:28:58,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:58,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917513581] [2020-10-27 20:28:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:58,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:58,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:58,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-27 20:28:58,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:28:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:58,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:58,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:58,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:58,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:58,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:58,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:58,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:58,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917513581] [2020-10-27 20:28:58,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:58,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:28:58,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437219629] [2020-10-27 20:28:58,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:28:58,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:58,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:28:58,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:28:58,919 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand 17 states. [2020-10-27 20:28:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:59,522 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-27 20:28:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:28:59,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 20:28:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:59,523 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:28:59,523 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:28:59,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:28:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:28:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 20:28:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:28:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-10-27 20:28:59,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 41 [2020-10-27 20:28:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:59,532 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-10-27 20:28:59,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:28:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-10-27 20:28:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:28:59,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:59,533 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:59,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:28:59,533 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:59,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1212950292, now seen corresponding path program 14 times [2020-10-27 20:28:59,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:59,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747926793] [2020-10-27 20:28:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:59,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:00,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:00,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:29:00,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:00,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-27 20:29:00,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:29:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:29:00,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:00,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:00,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:00,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:00,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:00,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:00,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:00,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:00,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:00,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 29 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:00,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747926793] [2020-10-27 20:29:00,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:00,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:29:00,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813022340] [2020-10-27 20:29:00,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:29:00,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:29:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:29:00,329 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 18 states. [2020-10-27 20:29:01,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:01,013 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-27 20:29:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:29:01,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-27 20:29:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:01,014 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:29:01,014 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:29:01,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:29:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:29:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:29:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:29:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-10-27 20:29:01,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 43 [2020-10-27 20:29:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:01,033 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-10-27 20:29:01,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:29:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-10-27 20:29:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:29:01,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:01,036 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:01,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:29:01,037 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:01,037 INFO L82 PathProgramCache]: Analyzing trace with hash -134037425, now seen corresponding path program 15 times [2020-10-27 20:29:01,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:01,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143252302] [2020-10-27 20:29:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:01,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:01,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:01,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:01,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:29:01,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:01,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-27 20:29:01,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:29:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:29:01,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:01,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:01,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:01,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:01,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:01,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:01,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:01,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:01,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:01,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:01,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:01,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 31 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:01,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143252302] [2020-10-27 20:29:01,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:01,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:29:01,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502318615] [2020-10-27 20:29:01,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:29:01,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:01,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:29:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:29:01,979 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 19 states. [2020-10-27 20:29:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:02,711 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-27 20:29:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:29:02,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-27 20:29:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:02,713 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:29:02,713 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:29:02,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:29:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:29:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:29:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:29:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-10-27 20:29:02,722 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 45 [2020-10-27 20:29:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:02,722 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-10-27 20:29:02,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:29:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-10-27 20:29:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:29:02,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:02,723 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:02,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:29:02,723 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1804077366, now seen corresponding path program 16 times [2020-10-27 20:29:02,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:02,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131786952] [2020-10-27 20:29:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:02,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:02,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:03,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:03,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:29:03,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:03,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-27 20:29:03,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:29:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:29:03,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:03,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:03,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:03,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:03,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:03,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:03,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:03,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:03,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:03,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:03,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:03,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 33 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:03,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131786952] [2020-10-27 20:29:03,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:03,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:29:03,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976720244] [2020-10-27 20:29:03,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:29:03,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:03,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:29:03,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:29:03,774 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 20 states. [2020-10-27 20:29:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:04,490 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-10-27 20:29:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:29:04,490 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 20:29:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:04,491 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:29:04,491 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:29:04,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:29:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:29:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 20:29:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:29:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2020-10-27 20:29:04,499 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 47 [2020-10-27 20:29:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:04,500 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2020-10-27 20:29:04,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:29:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2020-10-27 20:29:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:29:04,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:04,501 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:04,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:29:04,501 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -394691963, now seen corresponding path program 17 times [2020-10-27 20:29:04,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:04,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543222097] [2020-10-27 20:29:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:04,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:05,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:05,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:29:05,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:05,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-27 20:29:05,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:29:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:29:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:05,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:05,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:05,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:05,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:05,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:05,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 35 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:05,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543222097] [2020-10-27 20:29:05,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:05,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:29:05,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025915768] [2020-10-27 20:29:05,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:29:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:29:05,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:29:05,597 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand 21 states. [2020-10-27 20:29:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:06,440 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-10-27 20:29:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:29:06,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-27 20:29:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:06,441 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:29:06,441 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:29:06,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:29:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:29:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 20:29:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:29:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-10-27 20:29:06,457 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 49 [2020-10-27 20:29:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:06,458 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-10-27 20:29:06,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:29:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-10-27 20:29:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:29:06,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:06,459 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:06,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:29:06,459 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1109982080, now seen corresponding path program 18 times [2020-10-27 20:29:06,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:06,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186837490] [2020-10-27 20:29:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:06,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:06,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:06,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:07,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:07,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:29:07,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:07,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 787 [2020-10-27 20:29:07,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:07,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:29:07,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:07,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:29:07,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:07,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:07,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:07,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:07,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:07,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:07,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:07,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:07,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 37 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:07,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186837490] [2020-10-27 20:29:07,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:07,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:29:07,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891350200] [2020-10-27 20:29:07,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:29:07,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:07,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:29:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:29:07,563 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 22 states. [2020-10-27 20:29:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:08,498 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-27 20:29:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:29:08,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 20:29:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:08,499 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:29:08,499 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:29:08,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:29:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:29:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 20:29:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:29:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-10-27 20:29:08,507 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 51 [2020-10-27 20:29:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:08,507 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-10-27 20:29:08,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:29:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-10-27 20:29:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:29:08,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:08,508 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:08,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:29:08,509 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:08,509 INFO L82 PathProgramCache]: Analyzing trace with hash -302241349, now seen corresponding path program 19 times [2020-10-27 20:29:08,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:08,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771875637] [2020-10-27 20:29:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:08,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:09,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:09,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:29:09,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:09,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-27 20:29:09,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:29:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:29:09,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:09,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:09,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:09,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:09,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:09,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:09,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:09,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:09,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 39 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:09,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771875637] [2020-10-27 20:29:09,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:09,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:29:09,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146175281] [2020-10-27 20:29:09,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:29:09,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:29:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:29:09,786 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 23 states. [2020-10-27 20:29:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:10,838 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-10-27 20:29:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:29:10,838 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-27 20:29:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:10,839 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:29:10,839 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:29:10,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:29:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:29:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 20:29:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:29:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2020-10-27 20:29:10,849 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 53 [2020-10-27 20:29:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:10,849 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2020-10-27 20:29:10,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:29:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2020-10-27 20:29:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:29:10,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:10,850 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:10,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:29:10,850 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash -239291082, now seen corresponding path program 20 times [2020-10-27 20:29:10,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:10,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926578280] [2020-10-27 20:29:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:10,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:11,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:11,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:11,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:29:11,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:11,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-27 20:29:11,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:11,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:29:11,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:29:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:12,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:12,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:12,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:12,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:12,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:12,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 41 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926578280] [2020-10-27 20:29:12,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:12,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:29:12,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125717029] [2020-10-27 20:29:12,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:29:12,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:12,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:29:12,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:29:12,123 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand 24 states. [2020-10-27 20:29:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:13,084 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-27 20:29:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:29:13,086 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 20:29:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:13,086 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:29:13,086 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:29:13,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:29:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:29:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 20:29:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:29:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2020-10-27 20:29:13,101 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 55 [2020-10-27 20:29:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:13,101 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2020-10-27 20:29:13,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:29:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2020-10-27 20:29:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:29:13,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:13,102 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:13,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:29:13,102 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash 126373361, now seen corresponding path program 21 times [2020-10-27 20:29:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:13,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490338453] [2020-10-27 20:29:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:13,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:13,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:13,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:14,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:29:14,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-27 20:29:14,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:29:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:29:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:14,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:14,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:14,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:14,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:14,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 43 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:14,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490338453] [2020-10-27 20:29:14,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:14,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:29:14,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829105774] [2020-10-27 20:29:14,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:29:14,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:29:14,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:29:14,476 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand 25 states. [2020-10-27 20:29:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:15,621 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-10-27 20:29:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:29:15,622 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-27 20:29:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:15,623 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:29:15,623 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:29:15,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:29:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:29:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 20:29:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:29:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2020-10-27 20:29:15,629 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 57 [2020-10-27 20:29:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:15,630 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2020-10-27 20:29:15,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:29:15,630 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2020-10-27 20:29:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:29:15,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:15,631 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:15,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:29:15,631 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:15,632 INFO L82 PathProgramCache]: Analyzing trace with hash -657415188, now seen corresponding path program 22 times [2020-10-27 20:29:15,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:15,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311861475] [2020-10-27 20:29:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:16,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:29:16,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-27 20:29:16,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:29:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:29:16,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:16,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:16,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:16,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:16,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:16,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:16,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:16,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:16,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 45 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:16,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311861475] [2020-10-27 20:29:16,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:16,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:29:16,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435821121] [2020-10-27 20:29:16,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:29:16,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:29:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:29:16,901 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand 26 states. [2020-10-27 20:29:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:18,131 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-27 20:29:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:29:18,132 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 20:29:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:18,133 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:29:18,133 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:29:18,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:29:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:29:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 20:29:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:29:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-10-27 20:29:18,140 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 59 [2020-10-27 20:29:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:18,141 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-10-27 20:29:18,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:29:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-10-27 20:29:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:29:18,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:18,142 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:18,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:29:18,142 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2036033319, now seen corresponding path program 23 times [2020-10-27 20:29:18,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:18,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946478586] [2020-10-27 20:29:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:18,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:29:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:19,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:19,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:19,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:19,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:19,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:19,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:19,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 47 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:19,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946478586] [2020-10-27 20:29:19,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:19,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:29:19,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46653895] [2020-10-27 20:29:19,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:29:19,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:29:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:29:19,304 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 27 states. [2020-10-27 20:29:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:20,616 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2020-10-27 20:29:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:29:20,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-27 20:29:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:20,618 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:29:20,618 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:29:20,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:29:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:29:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 20:29:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:29:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2020-10-27 20:29:20,626 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 61 [2020-10-27 20:29:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:20,627 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2020-10-27 20:29:20,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:29:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2020-10-27 20:29:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:29:20,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:20,628 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:20,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:29:20,629 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 574769058, now seen corresponding path program 24 times [2020-10-27 20:29:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:20,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692655675] [2020-10-27 20:29:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:29:21,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-27 20:29:21,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:29:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:29:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:21,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:21,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:21,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:21,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 49 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:21,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692655675] [2020-10-27 20:29:21,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:21,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:29:21,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33213722] [2020-10-27 20:29:21,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:29:21,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:29:21,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:29:21,929 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 28 states. [2020-10-27 20:29:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:23,284 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2020-10-27 20:29:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:29:23,285 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 20:29:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:23,286 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:29:23,286 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:29:23,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:29:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:29:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 20:29:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:29:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2020-10-27 20:29:23,294 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 63 [2020-10-27 20:29:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:23,294 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2020-10-27 20:29:23,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:29:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2020-10-27 20:29:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:29:23,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:23,295 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:23,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:29:23,295 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:23,296 INFO L82 PathProgramCache]: Analyzing trace with hash 754120029, now seen corresponding path program 25 times [2020-10-27 20:29:23,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:23,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074263898] [2020-10-27 20:29:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:23,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:24,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:29:24,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:24,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-27 20:29:24,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:29:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:29:24,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:24,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:24,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 51 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074263898] [2020-10-27 20:29:24,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:24,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:29:24,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804231103] [2020-10-27 20:29:24,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:29:24,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:24,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:29:24,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:29:24,682 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand 29 states. [2020-10-27 20:29:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:26,181 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2020-10-27 20:29:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:29:26,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-27 20:29:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:26,182 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:29:26,183 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:29:26,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:29:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:29:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-27 20:29:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 20:29:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2020-10-27 20:29:26,189 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 65 [2020-10-27 20:29:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:26,190 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2020-10-27 20:29:26,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:29:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2020-10-27 20:29:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:29:26,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:26,190 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:26,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:29:26,191 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:26,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:26,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1311711320, now seen corresponding path program 26 times [2020-10-27 20:29:26,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:26,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348018035] [2020-10-27 20:29:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:27,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:29:27,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:27,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-27 20:29:27,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:27,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:29:27,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:27,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:29:27,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:27,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:27,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:27,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:27,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:27,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:27,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:27,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 53 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:27,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348018035] [2020-10-27 20:29:27,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:27,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:29:27,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152735483] [2020-10-27 20:29:27,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:29:27,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:29:27,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:29:27,773 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand 30 states. [2020-10-27 20:29:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:29,380 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-10-27 20:29:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:29:29,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-27 20:29:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:29,382 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:29:29,382 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:29:29,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:29:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:29:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 20:29:29,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:29:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-10-27 20:29:29,390 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 67 [2020-10-27 20:29:29,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:29,391 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-10-27 20:29:29,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:29:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-10-27 20:29:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 20:29:29,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:29,392 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:29,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:29:29,392 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash 286029971, now seen corresponding path program 27 times [2020-10-27 20:29:29,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:29,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625665027] [2020-10-27 20:29:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:29,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:29,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:29,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:30,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:30,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 20:29:30,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:30,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-27 20:29:30,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:29:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:29:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:30,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:30,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:30,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:30,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:30,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:30,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:30,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:30,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:30,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:30,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:30,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 55 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:30,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625665027] [2020-10-27 20:29:30,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:30,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:29:30,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626241226] [2020-10-27 20:29:30,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:29:30,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:29:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:29:30,952 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 31 states. [2020-10-27 20:29:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:32,498 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-27 20:29:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:29:32,500 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-27 20:29:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:32,501 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:29:32,501 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:29:32,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:29:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:29:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 20:29:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:29:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-10-27 20:29:32,510 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 69 [2020-10-27 20:29:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:32,510 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-10-27 20:29:32,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:29:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-10-27 20:29:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:29:32,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:32,511 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:32,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:29:32,511 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:32,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1846235634, now seen corresponding path program 28 times [2020-10-27 20:29:32,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:32,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44113683] [2020-10-27 20:29:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:32,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:33,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:29:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:34,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:34,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:34,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:34,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:34,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:34,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:34,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 57 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:34,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44113683] [2020-10-27 20:29:34,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:34,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:29:34,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677884465] [2020-10-27 20:29:34,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:29:34,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:34,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:29:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:29:34,146 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 32 states. [2020-10-27 20:29:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:35,847 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2020-10-27 20:29:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:29:35,848 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-27 20:29:35,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:35,849 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:29:35,849 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:29:35,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:29:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:29:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 20:29:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:29:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-10-27 20:29:35,856 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 71 [2020-10-27 20:29:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:35,856 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-10-27 20:29:35,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:29:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-10-27 20:29:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 20:29:35,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:35,857 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:35,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:29:35,857 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:35,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2040885449, now seen corresponding path program 29 times [2020-10-27 20:29:35,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:35,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488688912] [2020-10-27 20:29:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:35,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:36,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 20:29:36,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:36,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-27 20:29:36,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:29:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:29:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:37,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:37,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:37,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:37,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:37,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:37,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:37,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:37,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 59 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:37,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488688912] [2020-10-27 20:29:37,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:37,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:29:37,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511277858] [2020-10-27 20:29:37,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:29:37,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:29:37,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:29:37,602 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 33 states. [2020-10-27 20:29:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:39,392 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2020-10-27 20:29:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:29:39,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-27 20:29:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:39,394 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:29:39,394 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:29:39,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:29:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:29:39,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 20:29:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:29:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-10-27 20:29:39,407 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 73 [2020-10-27 20:29:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:39,407 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-10-27 20:29:39,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:29:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-10-27 20:29:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:29:39,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:39,409 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:39,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:29:39,409 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash 942698692, now seen corresponding path program 30 times [2020-10-27 20:29:39,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:39,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161444620] [2020-10-27 20:29:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:40,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:40,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 20:29:40,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:40,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1193 [2020-10-27 20:29:40,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:40,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:29:40,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:40,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:29:40,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:41,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:41,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:41,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:41,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:41,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:41,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:41,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:41,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 61 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:41,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161444620] [2020-10-27 20:29:41,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:41,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:29:41,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765720810] [2020-10-27 20:29:41,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:29:41,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:41,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:29:41,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:29:41,292 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 34 states. [2020-10-27 20:29:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:43,218 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2020-10-27 20:29:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:29:43,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-27 20:29:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:43,220 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:29:43,220 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:29:43,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:29:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:29:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 20:29:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:29:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2020-10-27 20:29:43,229 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 75 [2020-10-27 20:29:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:43,229 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-10-27 20:29:43,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:29:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2020-10-27 20:29:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:29:43,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:43,230 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:43,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:29:43,231 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:43,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:43,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2147180031, now seen corresponding path program 31 times [2020-10-27 20:29:43,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:43,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535813005] [2020-10-27 20:29:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:43,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:44,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:29:44,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:44,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1396 [2020-10-27 20:29:44,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:44,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:29:44,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:44,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:29:44,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:45,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:45,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:45,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:45,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:45,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:45,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:45,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:45,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:45,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:45,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 63 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:45,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535813005] [2020-10-27 20:29:45,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:45,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:29:45,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468334273] [2020-10-27 20:29:45,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:29:45,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:45,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:29:45,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:29:45,350 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand 35 states. [2020-10-27 20:29:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:47,380 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2020-10-27 20:29:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:29:47,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-27 20:29:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:47,383 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:29:47,383 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:29:47,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:29:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:29:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 20:29:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:29:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 113 transitions. [2020-10-27 20:29:47,392 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 113 transitions. Word has length 77 [2020-10-27 20:29:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:47,392 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 113 transitions. [2020-10-27 20:29:47,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:29:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 113 transitions. [2020-10-27 20:29:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 20:29:47,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:47,393 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:47,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:29:47,393 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 12576890, now seen corresponding path program 32 times [2020-10-27 20:29:47,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:47,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490055227] [2020-10-27 20:29:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:47,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:47,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:48,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:29:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:49,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:49,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:49,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:49,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:49,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:49,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:49,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:49,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:49,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:49,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:49,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 65 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:49,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490055227] [2020-10-27 20:29:49,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:49,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:29:49,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396832315] [2020-10-27 20:29:49,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:29:49,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:49,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:29:49,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:29:49,451 INFO L87 Difference]: Start difference. First operand 80 states and 113 transitions. Second operand 36 states. [2020-10-27 20:29:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:51,451 INFO L93 Difference]: Finished difference Result 90 states and 126 transitions. [2020-10-27 20:29:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:29:51,451 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-27 20:29:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:51,453 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:29:51,453 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:29:51,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:29:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:29:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 20:29:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:29:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2020-10-27 20:29:51,461 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 79 [2020-10-27 20:29:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:51,462 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2020-10-27 20:29:51,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:29:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2020-10-27 20:29:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:29:51,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:51,463 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:51,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:29:51,463 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1653325877, now seen corresponding path program 33 times [2020-10-27 20:29:51,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:51,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533024517] [2020-10-27 20:29:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:29:52,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:52,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1444 [2020-10-27 20:29:52,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:29:52,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:52,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:29:52,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:53,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:53,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:53,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:53,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:53,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:53,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:53,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 67 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:53,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533024517] [2020-10-27 20:29:53,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:53,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:29:53,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472266429] [2020-10-27 20:29:53,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:29:53,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:53,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:29:53,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:29:53,749 INFO L87 Difference]: Start difference. First operand 82 states and 116 transitions. Second operand 37 states. [2020-10-27 20:29:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:55,937 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2020-10-27 20:29:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:29:55,938 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-27 20:29:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:55,939 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:29:55,939 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:29:55,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:29:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:29:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 20:29:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 20:29:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2020-10-27 20:29:55,946 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 81 [2020-10-27 20:29:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:55,946 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2020-10-27 20:29:55,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:29:55,946 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2020-10-27 20:29:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 20:29:55,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:55,947 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:55,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:29:55,947 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:55,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:55,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2134862544, now seen corresponding path program 34 times [2020-10-27 20:29:55,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:55,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279219274] [2020-10-27 20:29:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:55,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:56,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1301 [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:29:57,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:58,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:58,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:58,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:58,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 69 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:58,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279219274] [2020-10-27 20:29:58,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:58,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:29:58,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799914436] [2020-10-27 20:29:58,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:29:58,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:58,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:29:58,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:29:58,088 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand 38 states. [2020-10-27 20:30:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:00,401 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2020-10-27 20:30:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:30:00,401 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-27 20:30:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:00,403 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:30:00,403 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:30:00,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:30:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:30:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 20:30:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:30:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2020-10-27 20:30:00,410 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 83 [2020-10-27 20:30:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:00,410 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2020-10-27 20:30:00,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:30:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2020-10-27 20:30:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 20:30:00,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:00,411 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:00,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:30:00,411 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:00,412 INFO L82 PathProgramCache]: Analyzing trace with hash -451668117, now seen corresponding path program 35 times [2020-10-27 20:30:00,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:00,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661684941] [2020-10-27 20:30:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:00,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:02,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:02,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 20:30:02,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:02,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1715 [2020-10-27 20:30:02,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:30:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:30:02,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:02,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:02,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:02,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:02,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:02,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:02,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:30:02,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:02,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 71 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:02,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661684941] [2020-10-27 20:30:02,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:02,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:30:02,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142095240] [2020-10-27 20:30:02,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:30:02,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:30:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:30:02,989 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 39 states. [2020-10-27 20:30:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:05,346 INFO L93 Difference]: Finished difference Result 96 states and 135 transitions. [2020-10-27 20:30:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:30:05,346 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-27 20:30:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:05,348 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:30:05,348 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:30:05,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:30:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:30:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 20:30:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:30:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 125 transitions. [2020-10-27 20:30:05,357 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 125 transitions. Word has length 85 [2020-10-27 20:30:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:05,358 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 125 transitions. [2020-10-27 20:30:05,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:30:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 125 transitions. [2020-10-27 20:30:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 20:30:05,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:05,359 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:05,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:30:05,359 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:05,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2104494362, now seen corresponding path program 36 times [2020-10-27 20:30:05,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:05,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467986008] [2020-10-27 20:30:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:06,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:06,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 20:30:06,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-27 20:30:06,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:30:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:30:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:07,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:07,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:07,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:07,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:07,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:07,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:07,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 73 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:07,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467986008] [2020-10-27 20:30:07,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:07,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:30:07,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151623701] [2020-10-27 20:30:07,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:30:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:30:07,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:30:07,833 INFO L87 Difference]: Start difference. First operand 88 states and 125 transitions. Second operand 40 states. [2020-10-27 20:30:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:10,233 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-10-27 20:30:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:30:10,234 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-27 20:30:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:10,235 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:30:10,235 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:30:10,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:30:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:30:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 20:30:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:30:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2020-10-27 20:30:10,243 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 87 [2020-10-27 20:30:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:10,244 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2020-10-27 20:30:10,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:30:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2020-10-27 20:30:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 20:30:10,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:10,245 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:10,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:30:10,245 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1332616287, now seen corresponding path program 37 times [2020-10-27 20:30:10,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:10,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439776782] [2020-10-27 20:30:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:10,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:10,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:10,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:12,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1779 [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:30:12,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:12,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:12,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:12,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:12,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:12,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:12,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:12,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:12,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:12,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:12,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 75 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:13,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439776782] [2020-10-27 20:30:13,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:13,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:30:13,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030587037] [2020-10-27 20:30:13,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:30:13,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:13,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:30:13,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:30:13,003 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand 41 states. [2020-10-27 20:30:15,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:15,633 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2020-10-27 20:30:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:30:15,634 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-27 20:30:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:15,635 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:30:15,635 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:30:15,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:30:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:30:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-27 20:30:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:30:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 131 transitions. [2020-10-27 20:30:15,645 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 131 transitions. Word has length 89 [2020-10-27 20:30:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:15,645 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 131 transitions. [2020-10-27 20:30:15,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:30:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 131 transitions. [2020-10-27 20:30:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 20:30:15,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:15,646 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:15,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:30:15,646 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:15,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1707838876, now seen corresponding path program 38 times [2020-10-27 20:30:15,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:15,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561259723] [2020-10-27 20:30:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:15,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:16,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:17,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:17,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 20:30:17,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:17,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1478 [2020-10-27 20:30:17,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:17,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:30:17,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:17,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:30:17,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:18,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:18,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:18,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:18,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:18,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:18,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:18,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:18,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:18,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:18,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:18,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 77 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:18,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561259723] [2020-10-27 20:30:18,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:18,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:30:18,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731190791] [2020-10-27 20:30:18,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:30:18,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:18,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:30:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:30:18,156 INFO L87 Difference]: Start difference. First operand 92 states and 131 transitions. Second operand 42 states. [2020-10-27 20:30:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:20,917 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2020-10-27 20:30:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:30:20,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-27 20:30:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:20,919 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:30:20,919 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:30:20,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:30:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:30:20,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 20:30:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:30:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 134 transitions. [2020-10-27 20:30:20,929 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 134 transitions. Word has length 91 [2020-10-27 20:30:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:20,930 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 134 transitions. [2020-10-27 20:30:20,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:30:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 134 transitions. [2020-10-27 20:30:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 20:30:20,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:20,931 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:20,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:30:20,932 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1287478057, now seen corresponding path program 39 times [2020-10-27 20:30:20,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:20,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185282392] [2020-10-27 20:30:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:20,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:22,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 20:30:22,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1827 [2020-10-27 20:30:22,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:30:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:30:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:23,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:23,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:23,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:23,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:23,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:23,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:23,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:23,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:23,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:23,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:23,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 79 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:23,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185282392] [2020-10-27 20:30:23,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:23,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:30:23,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093178288] [2020-10-27 20:30:23,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:30:23,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:30:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:30:23,848 INFO L87 Difference]: Start difference. First operand 94 states and 134 transitions. Second operand 43 states. [2020-10-27 20:30:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:26,599 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2020-10-27 20:30:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:30:26,600 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-27 20:30:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:26,601 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:30:26,601 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:30:26,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:30:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:30:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 20:30:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:30:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2020-10-27 20:30:26,611 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 93 [2020-10-27 20:30:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:26,611 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2020-10-27 20:30:26,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:30:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2020-10-27 20:30:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 20:30:26,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:26,612 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:26,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:30:26,612 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:26,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2136004946, now seen corresponding path program 40 times [2020-10-27 20:30:26,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:26,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45713633] [2020-10-27 20:30:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:26,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:26,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:28,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:30:28,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:29,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:29,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:29,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:29,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:29,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:29,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:29,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 81 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:29,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45713633] [2020-10-27 20:30:29,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:29,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:30:29,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755691697] [2020-10-27 20:30:29,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:30:29,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:30:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:30:29,357 INFO L87 Difference]: Start difference. First operand 96 states and 137 transitions. Second operand 44 states. [2020-10-27 20:30:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:32,304 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2020-10-27 20:30:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:30:32,304 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-27 20:30:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:32,306 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:30:32,306 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:30:32,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:30:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:30:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 20:30:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:30:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 140 transitions. [2020-10-27 20:30:32,315 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 140 transitions. Word has length 95 [2020-10-27 20:30:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:32,316 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 140 transitions. [2020-10-27 20:30:32,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:30:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 140 transitions. [2020-10-27 20:30:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 20:30:32,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:32,317 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:32,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:30:32,317 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:32,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2136745203, now seen corresponding path program 41 times [2020-10-27 20:30:32,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:32,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481481056] [2020-10-27 20:30:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:32,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:33,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:34,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:34,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 20:30:34,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:34,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-10-27 20:30:34,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:30:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 20:30:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:35,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:35,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:35,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:35,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:35,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:35,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:35,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:35,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:35,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 83 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:35,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481481056] [2020-10-27 20:30:35,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:35,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:30:35,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213132550] [2020-10-27 20:30:35,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:30:35,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:30:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:30:35,317 INFO L87 Difference]: Start difference. First operand 98 states and 140 transitions. Second operand 45 states. [2020-10-27 20:30:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:38,237 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2020-10-27 20:30:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:30:38,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-27 20:30:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:38,239 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:30:38,239 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:30:38,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 20:30:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:30:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 20:30:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:30:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2020-10-27 20:30:38,248 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 97 [2020-10-27 20:30:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:38,248 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2020-10-27 20:30:38,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:30:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2020-10-27 20:30:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 20:30:38,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:38,249 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:38,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:30:38,249 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:38,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2034063880, now seen corresponding path program 42 times [2020-10-27 20:30:38,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:38,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68055523] [2020-10-27 20:30:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:38,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:38,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:40,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1837 [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 20:30:40,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:41,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:41,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:41,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:41,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:41,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:41,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:41,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:41,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 85 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:41,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68055523] [2020-10-27 20:30:41,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:41,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:30:41,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841986147] [2020-10-27 20:30:41,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:30:41,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:30:41,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:30:41,325 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand 46 states. [2020-10-27 20:30:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:44,509 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-10-27 20:30:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:30:44,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-27 20:30:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:44,511 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:30:44,511 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:30:44,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 20:30:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:30:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 20:30:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:30:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 146 transitions. [2020-10-27 20:30:44,518 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 146 transitions. Word has length 99 [2020-10-27 20:30:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:44,519 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 146 transitions. [2020-10-27 20:30:44,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:30:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 146 transitions. [2020-10-27 20:30:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:30:44,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:44,520 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:44,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:30:44,520 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1317861821, now seen corresponding path program 43 times [2020-10-27 20:30:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:44,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617956224] [2020-10-27 20:30:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:44,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:44,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:45,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:46,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:46,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 20:30:46,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:46,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1640 [2020-10-27 20:30:46,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:30:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 20:30:46,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:47,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:47,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:47,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:47,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:47,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:47,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:47,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:47,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:47,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:47,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:47,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 87 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:47,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617956224] [2020-10-27 20:30:47,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:47,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:30:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407098246] [2020-10-27 20:30:47,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:30:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:30:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:30:47,501 INFO L87 Difference]: Start difference. First operand 102 states and 146 transitions. Second operand 47 states. [2020-10-27 20:30:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:50,835 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2020-10-27 20:30:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:30:50,836 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-27 20:30:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:50,837 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:30:50,837 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:30:50,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 20:30:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:30:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 20:30:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:30:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 149 transitions. [2020-10-27 20:30:50,847 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 149 transitions. Word has length 101 [2020-10-27 20:30:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:50,847 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 149 transitions. [2020-10-27 20:30:50,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:30:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 149 transitions. [2020-10-27 20:30:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 20:30:50,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:50,848 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:50,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:30:50,849 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1292988482, now seen corresponding path program 44 times [2020-10-27 20:30:50,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:50,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569973702] [2020-10-27 20:30:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:50,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:50,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:51,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:52,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:52,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 20:30:52,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:52,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-10-27 20:30:52,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:52,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:30:52,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:52,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 20:30:52,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:53,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:53,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:53,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:53,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:53,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:53,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:53,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:53,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:53,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:53,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 89 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:53,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569973702] [2020-10-27 20:30:53,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:53,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:30:53,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715868952] [2020-10-27 20:30:53,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:30:53,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:53,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:30:53,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:30:53,890 INFO L87 Difference]: Start difference. First operand 104 states and 149 transitions. Second operand 48 states. [2020-10-27 20:30:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:57,319 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2020-10-27 20:30:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:30:57,319 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-27 20:30:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:57,321 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:30:57,321 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:30:57,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 20:30:57,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:30:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 20:30:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:30:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 152 transitions. [2020-10-27 20:30:57,330 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 152 transitions. Word has length 103 [2020-10-27 20:30:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:57,330 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 152 transitions. [2020-10-27 20:30:57,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:30:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 152 transitions. [2020-10-27 20:30:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 20:30:57,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:57,331 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:57,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:30:57,331 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1135453817, now seen corresponding path program 45 times [2020-10-27 20:30:57,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:57,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814296609] [2020-10-27 20:30:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:58,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:59,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:59,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 20:30:59,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:59,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1936 [2020-10-27 20:30:59,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:59,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:30:59,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:59,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 20:30:59,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:00,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:00,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:00,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:00,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 91 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:00,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814296609] [2020-10-27 20:31:00,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:00,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:31:00,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800651067] [2020-10-27 20:31:00,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:31:00,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:31:00,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:31:00,705 INFO L87 Difference]: Start difference. First operand 106 states and 152 transitions. Second operand 49 states. [2020-10-27 20:31:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:04,378 INFO L93 Difference]: Finished difference Result 116 states and 165 transitions. [2020-10-27 20:31:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:31:04,379 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2020-10-27 20:31:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:04,380 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:31:04,380 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:31:04,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:31:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:31:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 20:31:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 20:31:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 155 transitions. [2020-10-27 20:31:04,390 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 155 transitions. Word has length 105 [2020-10-27 20:31:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:04,390 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 155 transitions. [2020-10-27 20:31:04,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:31:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 155 transitions. [2020-10-27 20:31:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:31:04,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:04,391 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:04,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:31:04,391 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1593705868, now seen corresponding path program 46 times [2020-10-27 20:31:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:04,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054283192] [2020-10-27 20:31:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:04,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:04,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:05,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:06,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:06,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 20:31:06,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:06,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1913 [2020-10-27 20:31:06,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:31:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 20:31:06,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:07,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:07,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:07,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:07,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:07,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:07,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:07,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:07,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 93 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054283192] [2020-10-27 20:31:07,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:07,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:31:07,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822576705] [2020-10-27 20:31:07,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:31:07,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:31:07,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:31:07,794 INFO L87 Difference]: Start difference. First operand 108 states and 155 transitions. Second operand 50 states. [2020-10-27 20:31:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:11,550 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2020-10-27 20:31:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:31:11,551 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2020-10-27 20:31:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:11,553 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:31:11,553 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:31:11,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 20:31:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:31:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 20:31:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:31:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 158 transitions. [2020-10-27 20:31:11,563 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 158 transitions. Word has length 107 [2020-10-27 20:31:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:11,564 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 158 transitions. [2020-10-27 20:31:11,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:31:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 158 transitions. [2020-10-27 20:31:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 20:31:11,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:11,565 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:11,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:31:11,565 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -91145297, now seen corresponding path program 47 times [2020-10-27 20:31:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:11,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756527340] [2020-10-27 20:31:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:11,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:12,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:13,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2070 [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:31:13,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:15,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:15,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:15,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:15,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:15,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:15,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 95 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:15,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756527340] [2020-10-27 20:31:15,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:15,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:31:15,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164554734] [2020-10-27 20:31:15,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:31:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:31:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:31:15,208 INFO L87 Difference]: Start difference. First operand 110 states and 158 transitions. Second operand 51 states. [2020-10-27 20:31:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:19,082 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2020-10-27 20:31:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:31:19,083 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2020-10-27 20:31:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:19,084 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:31:19,084 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:31:19,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 20:31:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:31:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 20:31:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:31:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 161 transitions. [2020-10-27 20:31:19,093 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 161 transitions. Word has length 109 [2020-10-27 20:31:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:19,094 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 161 transitions. [2020-10-27 20:31:19,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:31:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 161 transitions. [2020-10-27 20:31:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:31:19,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:19,095 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:19,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:31:19,095 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash 760551978, now seen corresponding path program 48 times [2020-10-27 20:31:19,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:19,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485635663] [2020-10-27 20:31:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:19,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:20,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:21,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 20:31:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:22,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:22,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:22,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:22,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:22,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:22,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:22,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 97 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:22,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485635663] [2020-10-27 20:31:22,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:22,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:31:22,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765463230] [2020-10-27 20:31:22,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:31:22,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:31:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:31:22,863 INFO L87 Difference]: Start difference. First operand 112 states and 161 transitions. Second operand 52 states. [2020-10-27 20:31:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:26,679 INFO L93 Difference]: Finished difference Result 122 states and 174 transitions. [2020-10-27 20:31:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:31:26,679 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 111 [2020-10-27 20:31:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:26,681 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:31:26,681 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:31:26,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:31:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:31:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 20:31:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:31:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2020-10-27 20:31:26,689 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 111 [2020-10-27 20:31:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:26,690 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2020-10-27 20:31:26,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:31:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2020-10-27 20:31:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 20:31:26,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:26,691 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:26,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:31:26,691 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1097120283, now seen corresponding path program 49 times [2020-10-27 20:31:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:26,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817964063] [2020-10-27 20:31:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:26,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:26,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:27,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:28,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:28,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 20:31:28,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:28,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2196 [2020-10-27 20:31:28,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:31:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 20:31:28,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:30,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:30,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:30,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 99 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:30,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817964063] [2020-10-27 20:31:30,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:30,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:31:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953718469] [2020-10-27 20:31:30,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:31:30,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:30,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:31:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:31:30,600 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand 53 states. [2020-10-27 20:31:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:34,740 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2020-10-27 20:31:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:31:34,741 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-10-27 20:31:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:34,742 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:31:34,742 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:31:34,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:31:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:31:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 20:31:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 20:31:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 167 transitions. [2020-10-27 20:31:34,753 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 167 transitions. Word has length 113 [2020-10-27 20:31:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:34,753 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 167 transitions. [2020-10-27 20:31:34,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:31:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 167 transitions. [2020-10-27 20:31:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 20:31:34,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:34,754 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:34,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:31:34,754 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash 386232032, now seen corresponding path program 50 times [2020-10-27 20:31:34,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:34,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214797223] [2020-10-27 20:31:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:37,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 20:31:37,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2400 [2020-10-27 20:31:37,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:31:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 20:31:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:38,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:38,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:38,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 101 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214797223] [2020-10-27 20:31:38,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:38,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 20:31:38,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327149026] [2020-10-27 20:31:38,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 20:31:38,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 20:31:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:31:38,852 INFO L87 Difference]: Start difference. First operand 116 states and 167 transitions. Second operand 54 states. [2020-10-27 20:31:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:43,148 INFO L93 Difference]: Finished difference Result 126 states and 180 transitions. [2020-10-27 20:31:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 20:31:43,149 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 115 [2020-10-27 20:31:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:43,151 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:31:43,151 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:31:43,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 20:31:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:31:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 20:31:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:31:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 170 transitions. [2020-10-27 20:31:43,159 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 170 transitions. Word has length 115 [2020-10-27 20:31:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:43,159 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 170 transitions. [2020-10-27 20:31:43,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 20:31:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 170 transitions. [2020-10-27 20:31:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 20:31:43,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:43,160 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:43,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:31:43,160 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -41335525, now seen corresponding path program 51 times [2020-10-27 20:31:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:43,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568858249] [2020-10-27 20:31:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:43,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:43,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:43,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:45,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:45,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 20:31:45,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:45,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2429 [2020-10-27 20:31:45,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 20:31:45,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:45,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 20:31:45,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:47,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:47,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:47,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:47,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 103 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:47,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568858249] [2020-10-27 20:31:47,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:47,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 20:31:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949236666] [2020-10-27 20:31:47,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 20:31:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:47,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 20:31:47,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:31:47,431 INFO L87 Difference]: Start difference. First operand 118 states and 170 transitions. Second operand 55 states. [2020-10-27 20:31:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:51,993 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2020-10-27 20:31:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:31:51,994 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2020-10-27 20:31:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:51,996 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:31:51,996 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:31:51,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 20:31:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:31:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 20:31:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 20:31:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2020-10-27 20:31:52,006 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 117 [2020-10-27 20:31:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:52,007 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2020-10-27 20:31:52,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 20:31:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2020-10-27 20:31:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 20:31:52,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:52,008 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:52,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:31:52,008 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1383102614, now seen corresponding path program 52 times [2020-10-27 20:31:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:52,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812737917] [2020-10-27 20:31:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:52,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:54,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:54,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 20:31:54,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:54,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2972 [2020-10-27 20:31:54,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:31:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 20:31:54,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:56,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:56,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:56,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:56,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:56,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:31:56,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:56,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:56,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:56,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:56,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 105 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:56,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812737917] [2020-10-27 20:31:56,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:56,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 20:31:56,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552944819] [2020-10-27 20:31:56,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 20:31:56,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:56,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 20:31:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:31:56,947 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand 56 states. [2020-10-27 20:32:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:01,483 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2020-10-27 20:32:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 20:32:01,484 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 119 [2020-10-27 20:32:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:01,485 INFO L225 Difference]: With dead ends: 130 [2020-10-27 20:32:01,485 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 20:32:01,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 20:32:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 20:32:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 20:32:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:32:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 176 transitions. [2020-10-27 20:32:01,497 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 176 transitions. Word has length 119 [2020-10-27 20:32:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:01,497 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 176 transitions. [2020-10-27 20:32:01,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 20:32:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 176 transitions. [2020-10-27 20:32:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 20:32:01,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:01,498 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:01,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:32:01,499 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash 173586769, now seen corresponding path program 53 times [2020-10-27 20:32:01,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:01,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690748366] [2020-10-27 20:32:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:01,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:01,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:03,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:04,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2975 [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 20:32:04,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:06,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:06,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:06,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:06,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:06,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:06,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:06,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:06,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:06,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:06,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:06,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 107 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:06,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690748366] [2020-10-27 20:32:06,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:06,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 20:32:06,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585135381] [2020-10-27 20:32:06,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 20:32:06,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:06,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 20:32:06,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:32:06,521 INFO L87 Difference]: Start difference. First operand 122 states and 176 transitions. Second operand 57 states. [2020-10-27 20:32:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:11,490 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2020-10-27 20:32:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 20:32:11,492 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 121 [2020-10-27 20:32:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:11,493 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:32:11,493 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:32:11,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 20:32:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:32:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 20:32:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:32:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2020-10-27 20:32:11,503 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 121 [2020-10-27 20:32:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:11,503 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2020-10-27 20:32:11,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 20:32:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2020-10-27 20:32:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 20:32:11,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:11,504 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:11,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:32:11,505 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1764996940, now seen corresponding path program 54 times [2020-10-27 20:32:11,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:11,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392541440] [2020-10-27 20:32:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:11,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:14,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:14,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 20:32:14,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:14,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3133 [2020-10-27 20:32:14,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 20:32:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 20:32:14,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:16,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:16,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:16,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:16,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:16,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:16,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 109 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:16,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392541440] [2020-10-27 20:32:16,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:16,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 20:32:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122145956] [2020-10-27 20:32:16,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 20:32:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:16,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 20:32:16,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:32:16,790 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 58 states. [2020-10-27 20:32:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:21,913 INFO L93 Difference]: Finished difference Result 134 states and 192 transitions. [2020-10-27 20:32:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 20:32:21,914 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 123 [2020-10-27 20:32:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:21,916 INFO L225 Difference]: With dead ends: 134 [2020-10-27 20:32:21,916 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:32:21,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 20:32:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:32:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 20:32:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 20:32:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 182 transitions. [2020-10-27 20:32:21,926 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 182 transitions. Word has length 123 [2020-10-27 20:32:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:21,926 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 182 transitions. [2020-10-27 20:32:21,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 20:32:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 182 transitions. [2020-10-27 20:32:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 20:32:21,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:21,927 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:21,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 20:32:21,928 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:21,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2101813895, now seen corresponding path program 55 times [2020-10-27 20:32:21,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:21,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770286101] [2020-10-27 20:32:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:22,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2955 [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 20:32:24,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:27,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:27,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:27,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:27,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 111 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:27,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770286101] [2020-10-27 20:32:27,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:27,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 20:32:27,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892162879] [2020-10-27 20:32:27,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 20:32:27,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 20:32:27,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:32:27,058 INFO L87 Difference]: Start difference. First operand 126 states and 182 transitions. Second operand 59 states. [2020-10-27 20:32:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:32,217 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2020-10-27 20:32:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 20:32:32,217 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2020-10-27 20:32:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:32,219 INFO L225 Difference]: With dead ends: 136 [2020-10-27 20:32:32,219 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:32:32,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-27 20:32:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:32:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-27 20:32:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 20:32:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2020-10-27 20:32:32,227 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 125 [2020-10-27 20:32:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:32,227 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2020-10-27 20:32:32,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 20:32:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2020-10-27 20:32:32,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 20:32:32,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:32,228 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:32,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 20:32:32,229 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash -634606846, now seen corresponding path program 56 times [2020-10-27 20:32:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:32,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011208920] [2020-10-27 20:32:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:32,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:33,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking...