/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/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:11:53,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:11:53,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:11:53,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:11:53,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:11:53,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:11:53,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:11:53,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:11:53,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:11:53,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:11:53,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:11:53,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:11:53,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:11:53,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:11:53,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:11:53,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:11:53,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:11:53,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:11:53,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:11:53,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:11:53,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:11:53,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:11:53,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:11:53,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:11:53,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:11:53,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:11:53,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:11:53,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:11:53,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:11:53,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:11:53,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:11:53,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:11:53,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:11:53,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:11:53,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:11:53,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:11:53,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:11:53,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:11:53,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:11:53,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:11:53,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:11:53,885 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 20:11:53,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:11:53,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:11:53,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:11:53,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:11:53,938 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:11:53,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:11:53,939 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:11:53,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:11:53,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:11:53,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:11:53,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:11:53,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:11:53,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:11:53,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:11:53,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:11:53,942 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:11:53,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:11:53,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:11:53,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:11:53,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:11:53,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:11:53,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:11:53,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:11:53,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:11:53,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:11:53,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:11:53,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:11:53,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:11:53,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:11:53,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:11:54,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:11:54,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:11:54,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:11:54,392 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:11:54,396 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:11:54,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-27 20:11:54,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a0308aaf/533b4b56fbc24cec9a9d70e088b0485e/FLAGccb325e4e [2020-10-27 20:11:55,010 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:11:55,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-27 20:11:55,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a0308aaf/533b4b56fbc24cec9a9d70e088b0485e/FLAGccb325e4e [2020-10-27 20:11:55,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a0308aaf/533b4b56fbc24cec9a9d70e088b0485e [2020-10-27 20:11:55,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:11:55,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:11:55,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:55,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:11:55,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:11:55,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5317b6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55, skipping insertion in model container [2020-10-27 20:11:55,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:11:55,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:11:55,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:55,619 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:11:55,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:55,652 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:11:55,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55 WrapperNode [2020-10-27 20:11:55,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:55,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:11:55,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:11:55,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:11:55,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (1/1) ... [2020-10-27 20:11:55,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:11:55,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:11:55,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:11:55,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:11:55,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (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 20:11:55,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:11:55,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:11:55,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:11:55,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:11:55,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:11:55,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:11:55,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:11:55,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:11:55,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:11:55,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:11:55,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:11:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:11:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:11:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:11:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:11:55,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:11:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:11:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:11:56,132 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:11:56,133 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:11:56,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:56 BoogieIcfgContainer [2020-10-27 20:11:56,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:11:56,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:11:56,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:11:56,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:11:56,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:11:55" (1/3) ... [2020-10-27 20:11:56,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5550a838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:56, skipping insertion in model container [2020-10-27 20:11:56,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:55" (2/3) ... [2020-10-27 20:11:56,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5550a838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:56, skipping insertion in model container [2020-10-27 20:11:56,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:56" (3/3) ... [2020-10-27 20:11:56,143 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2020-10-27 20:11:56,155 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:11:56,159 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:11:56,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:11:56,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:11:56,198 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:11:56,198 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:11:56,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:11:56,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:11:56,198 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:11:56,198 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:11:56,199 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:11:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 20:11:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:11:56,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:56,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:56,221 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2020849535, now seen corresponding path program 1 times [2020-10-27 20:11:56,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:56,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932962846] [2020-10-27 20:11:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:56,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:56,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:56,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:11:56,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:56,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 20:11:56,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:11:56,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:56,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:11:56,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:56,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:56,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:56,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:56,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:11:56,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:56,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:56,693 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 20:11:56,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932962846] [2020-10-27 20:11:56,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:56,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:11:56,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706104662] [2020-10-27 20:11:56,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:11:56,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:56,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:11:56,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:56,718 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 20:11:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:56,805 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-27 20:11:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:11:56,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:11:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:56,815 INFO L225 Difference]: With dead ends: 35 [2020-10-27 20:11:56,815 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:11:56,821 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 20:11:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:11:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:11:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:11:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-27 20:11:56,862 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-27 20:11:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:56,862 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-27 20:11:56,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:11:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-27 20:11:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:11:56,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:56,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:56,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:11:56,864 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1987826251, now seen corresponding path program 1 times [2020-10-27 20:11:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:56,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834305111] [2020-10-27 20:11:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:56,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:57,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:57,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:11:57,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:57,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 20:11:57,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:11:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:11:57,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:57,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:57,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:57,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:57,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:57,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:57,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:11:57,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:57,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:57,131 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 20:11:57,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834305111] [2020-10-27 20:11:57,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:57,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:11:57,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162513485] [2020-10-27 20:11:57,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:11:57,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:11:57,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:57,142 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-27 20:11:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:57,270 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-27 20:11:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:11:57,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 20:11:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:57,273 INFO L225 Difference]: With dead ends: 22 [2020-10-27 20:11:57,273 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:11:57,275 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 20:11:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:11:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-27 20:11:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:11:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 20:11:57,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 20:11:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:57,291 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 20:11:57,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:11:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 20:11:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:11:57,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:57,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:57,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:11:57,294 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:57,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1243554288, now seen corresponding path program 1 times [2020-10-27 20:11:57,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:57,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323213746] [2020-10-27 20:11:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:57,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:57,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:57,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:11:57,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:57,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 20:11:57,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:57,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:11:57,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:57,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:11:57,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:57,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:57,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:57,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:57,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:57,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:57,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:11:57,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:57,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:57,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323213746] [2020-10-27 20:11:57,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:57,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:11:57,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985929676] [2020-10-27 20:11:57,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:11:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:11:57,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:57,568 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-10-27 20:11:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:57,733 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-27 20:11:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:11:57,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 20:11:57,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:57,734 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:11:57,734 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:11:57,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:11:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 20:11:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:11:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 20:11:57,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-27 20:11:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:57,742 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 20:11:57,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:11:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 20:11:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:11:57,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:57,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:57,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:11:57,744 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1338897259, now seen corresponding path program 2 times [2020-10-27 20:11:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:57,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804480741] [2020-10-27 20:11:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:57,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:57,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:57,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:11:57,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 20:11:57,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:11:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:11:57,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:57,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:58,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:58,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:58,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:58,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:58,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:11:58,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:58,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:58,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:58,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:58,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:58,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804480741] [2020-10-27 20:11:58,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:58,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:11:58,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864740107] [2020-10-27 20:11:58,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:11:58,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:11:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:58,024 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-10-27 20:11:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:58,256 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-27 20:11:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:11:58,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 20:11:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:58,258 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:11:58,258 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:11:58,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:11:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 20:11:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:11:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-27 20:11:58,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-27 20:11:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:58,265 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-27 20:11:58,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:11:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-27 20:11:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:11:58,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:58,267 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:58,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:11:58,267 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2018955629, now seen corresponding path program 1 times [2020-10-27 20:11:58,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:58,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073537629] [2020-10-27 20:11:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:58,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:58,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:58,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:11:58,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:58,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 20:11:58,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:11:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:11:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:11:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:58,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:58,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:58,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:58,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:58,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:58,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:11:58,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073537629] [2020-10-27 20:11:58,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:58,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:11:58,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005749110] [2020-10-27 20:11:58,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:11:58,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:58,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:11:58,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:58,379 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-10-27 20:11:58,516 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-10-27 20:11:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:58,544 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-10-27 20:11:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:11:58,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 20:11:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:58,547 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:11:58,547 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:11:58,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:11:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:11:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:11:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 20:11:58,562 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2020-10-27 20:11:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:58,562 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 20:11:58,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:11:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 20:11:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:11:58,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:58,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:58,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:11:58,565 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash 501004305, now seen corresponding path program 1 times [2020-10-27 20:11:58,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:58,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637217768] [2020-10-27 20:11:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:58,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:58,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:11:58,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:58,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 20:11:58,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:58,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:11:58,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:58,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:11:58,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:58,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:59,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:59,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:11:59,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:59,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:59,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:59,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:59,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637217768] [2020-10-27 20:11:59,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:59,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:11:59,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333979621] [2020-10-27 20:11:59,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:11:59,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:59,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:11:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:59,014 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-10-27 20:11:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:59,327 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-27 20:11:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:11:59,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 20:11:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:59,329 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:11:59,329 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:11:59,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:11:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 20:11:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:11:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-27 20:11:59,338 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2020-10-27 20:11:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:59,338 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-27 20:11:59,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:11:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-27 20:11:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:11:59,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:59,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:59,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:11:59,340 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1525788122, now seen corresponding path program 3 times [2020-10-27 20:11:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:59,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733897154] [2020-10-27 20:11:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:11:59,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:59,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 20:11:59,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:11:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:59,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:11:59,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:59,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:59,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:59,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:59,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:59,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733897154] [2020-10-27 20:11:59,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:59,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:11:59,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130588639] [2020-10-27 20:11:59,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:11:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:11:59,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:59,563 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-10-27 20:11:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:59,796 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-27 20:11:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:11:59,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 20:11:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:59,798 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:11:59,798 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:11:59,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:11:59,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-27 20:11:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:11:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-27 20:11:59,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-10-27 20:11:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:59,808 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-27 20:11:59,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:11:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-27 20:11:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:11:59,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:59,809 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:59,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:11:59,809 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash -929277610, now seen corresponding path program 2 times [2020-10-27 20:11:59,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:59,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274532027] [2020-10-27 20:11:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:11:59,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:11:59,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:11:59,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:11:59,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:11:59,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:59,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:59,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:59,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:59,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:11:59,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274532027] [2020-10-27 20:11:59,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:59,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:11:59,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292985647] [2020-10-27 20:11:59,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:11:59,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:11:59,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:59,939 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-10-27 20:12:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:00,002 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-27 20:12:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:12:00,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:12:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:00,004 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:12:00,004 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:12:00,004 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 20:12:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:12:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:12:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:12:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 20:12:00,012 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-27 20:12:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:00,012 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 20:12:00,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:12:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 20:12:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:12:00,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:00,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:00,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:12:00,013 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1630342188, now seen corresponding path program 2 times [2020-10-27 20:12:00,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:00,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828271233] [2020-10-27 20:12:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:00,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:00,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:12:00,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:00,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 20:12:00,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:12:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:12:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:00,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:00,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:00,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:12:00,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:00,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828271233] [2020-10-27 20:12:00,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:00,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:12:00,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609863305] [2020-10-27 20:12:00,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:12:00,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:00,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:12:00,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:12:00,221 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-27 20:12:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:00,488 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-27 20:12:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:12:00,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 20:12:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:00,492 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:12:00,492 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:12:00,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:12:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:12:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 20:12:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:12:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 20:12:00,507 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2020-10-27 20:12:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:00,507 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 20:12:00,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:12:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 20:12:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:12:00,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:00,512 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:00,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:12:00,512 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1414402527, now seen corresponding path program 4 times [2020-10-27 20:12:00,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:00,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807460337] [2020-10-27 20:12:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:00,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:12:00,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:00,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 20:12:00,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:12:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:12:00,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:00,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:00,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:00,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:00,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:00,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:12:00,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:00,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:00,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:00,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807460337] [2020-10-27 20:12:00,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:00,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:12:00,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600736904] [2020-10-27 20:12:00,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:12:00,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:12:00,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:12:00,767 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-27 20:12:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:01,036 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 20:12:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:12:01,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 20:12:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:01,037 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:12:01,037 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:12:01,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:12:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:12:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:12:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:12:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-27 20:12:01,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2020-10-27 20:12:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:01,045 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-27 20:12:01,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:12:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-27 20:12:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:12:01,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:01,063 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:01,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:12:01,063 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1747028132, now seen corresponding path program 5 times [2020-10-27 20:12:01,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:01,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014556676] [2020-10-27 20:12:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:01,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:01,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:01,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:12:01,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:01,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 20:12:01,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:01,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:12:01,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:01,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:12:01,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:01,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:01,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:01,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:01,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:01,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:01,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:01,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:01,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:01,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014556676] [2020-10-27 20:12:01,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:01,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:12:01,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926451347] [2020-10-27 20:12:01,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:12:01,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:01,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:12:01,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:12:01,410 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-27 20:12:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:01,733 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-27 20:12:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:12:01,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 20:12:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:01,735 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:12:01,735 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:12:01,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:12:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 20:12:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:12:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-27 20:12:01,748 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2020-10-27 20:12:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:01,749 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-27 20:12:01,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:12:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-27 20:12:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:12:01,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:01,750 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:01,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:12:01,750 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash 457567514, now seen corresponding path program 3 times [2020-10-27 20:12:01,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:01,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549168210] [2020-10-27 20:12:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:01,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:01,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:01,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:12:01,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:01,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 20:12:01,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:01,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:12:01,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:01,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:12:01,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:01,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:01,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:01,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:01,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:01,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:01,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:01,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:01,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:02,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549168210] [2020-10-27 20:12:02,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:02,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:12:02,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530790493] [2020-10-27 20:12:02,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:12:02,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:12:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:12:02,005 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2020-10-27 20:12:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:02,380 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-27 20:12:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:12:02,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 20:12:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:02,381 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:12:02,381 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:12:02,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:12:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 20:12:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:12:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-27 20:12:02,393 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 22 [2020-10-27 20:12:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:02,397 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-27 20:12:02,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:12:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-27 20:12:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:12:02,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:02,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:02,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:12:02,401 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:02,402 INFO L82 PathProgramCache]: Analyzing trace with hash -722312663, now seen corresponding path program 6 times [2020-10-27 20:12:02,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:02,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753457633] [2020-10-27 20:12:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:02,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:02,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:12:02,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:02,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 20:12:02,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:12:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:12:02,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:02,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:02,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:02,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:02,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:02,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:02,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:02,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:02,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:02,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:02,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:02,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:12:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:02,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753457633] [2020-10-27 20:12:02,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:02,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:12:02,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822699372] [2020-10-27 20:12:02,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:12:02,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:12:02,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:12:02,695 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-27 20:12:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:03,139 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-27 20:12:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:12:03,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 20:12:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:03,141 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:12:03,141 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:12:03,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:12:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 20:12:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:12:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-27 20:12:03,151 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2020-10-27 20:12:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:03,151 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-27 20:12:03,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:12:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-27 20:12:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:12:03,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:03,153 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:03,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:12:03,153 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:03,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:03,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1358098030, now seen corresponding path program 7 times [2020-10-27 20:12:03,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:03,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716831436] [2020-10-27 20:12:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:03,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:03,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:03,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:12:03,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:03,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 20:12:03,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:12:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:12:03,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:03,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:03,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:03,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:03,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:03,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:03,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:03,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:03,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:03,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:03,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716831436] [2020-10-27 20:12:03,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:03,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:12:03,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651708197] [2020-10-27 20:12:03,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:12:03,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:03,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:12:03,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:12:03,550 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-10-27 20:12:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:04,031 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-27 20:12:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:12:04,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 20:12:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:04,032 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:12:04,033 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:12:04,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:12:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 20:12:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:12:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-27 20:12:04,056 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 26 [2020-10-27 20:12:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:04,057 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-27 20:12:04,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:12:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-27 20:12:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:12:04,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:04,058 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:04,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:12:04,060 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:04,060 INFO L82 PathProgramCache]: Analyzing trace with hash -949038240, now seen corresponding path program 4 times [2020-10-27 20:12:04,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:04,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039220430] [2020-10-27 20:12:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:04,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:04,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:04,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:12:04,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:04,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 20:12:04,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:04,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:12:04,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:04,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:12:04,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:04,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:04,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:04,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:04,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:04,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:04,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:12:04,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:04,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:04,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:04,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:04,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:04,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039220430] [2020-10-27 20:12:04,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:04,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:12:04,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63205833] [2020-10-27 20:12:04,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:12:04,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:12:04,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:12:04,467 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2020-10-27 20:12:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:04,990 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 20:12:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:12:04,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 20:12:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:04,991 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:12:04,991 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:12:04,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:12:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:12:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:12:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 20:12:05,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2020-10-27 20:12:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:05,013 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 20:12:05,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:12:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 20:12:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:12:05,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:05,015 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:05,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:12:05,016 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:05,016 INFO L82 PathProgramCache]: Analyzing trace with hash -821985933, now seen corresponding path program 8 times [2020-10-27 20:12:05,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:05,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845872915] [2020-10-27 20:12:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:05,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:05,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:05,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:12:05,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:05,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 20:12:05,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:05,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:12:05,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:05,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:12:05,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:05,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:05,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:05,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:05,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:05,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:12:05,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:05,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:05,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845872915] [2020-10-27 20:12:05,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:05,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:12:05,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196347413] [2020-10-27 20:12:05,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:12:05,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:12:05,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:12:05,470 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-27 20:12:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:06,011 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-27 20:12:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:12:06,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 20:12:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:06,013 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:12:06,013 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:12:06,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:12:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:12:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:12:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-27 20:12:06,028 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 28 [2020-10-27 20:12:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:06,028 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-27 20:12:06,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:12:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-27 20:12:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:12:06,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:06,031 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:06,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:12:06,032 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash 61366072, now seen corresponding path program 9 times [2020-10-27 20:12:06,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:06,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725537388] [2020-10-27 20:12:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:06,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:06,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:06,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:12:06,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:06,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 20:12:06,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:06,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:12:06,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:06,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:12:06,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:06,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:06,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:06,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:06,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:06,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725537388] [2020-10-27 20:12:06,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:06,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:12:06,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972898139] [2020-10-27 20:12:06,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:12:06,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:06,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:12:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:12:06,483 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2020-10-27 20:12:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:07,091 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-27 20:12:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:12:07,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 20:12:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:07,092 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:12:07,092 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:12:07,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:12:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 20:12:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:12:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-27 20:12:07,103 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 30 [2020-10-27 20:12:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:07,103 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-27 20:12:07,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:12:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-27 20:12:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:12:07,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:07,104 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:07,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:12:07,105 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash -863033690, now seen corresponding path program 5 times [2020-10-27 20:12:07,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:07,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670015369] [2020-10-27 20:12:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:07,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:07,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:07,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:12:07,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:07,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 20:12:07,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:12:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:12:07,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:07,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:07,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:07,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:07,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:07,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:07,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:07,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670015369] [2020-10-27 20:12:07,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:07,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:12:07,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144581211] [2020-10-27 20:12:07,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:12:07,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:12:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:12:07,513 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 13 states. [2020-10-27 20:12:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:08,120 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-27 20:12:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:12:08,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 20:12:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:08,122 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:12:08,122 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:12:08,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:12:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 20:12:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:12:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 20:12:08,134 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 30 [2020-10-27 20:12:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:08,134 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 20:12:08,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:12:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 20:12:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:12:08,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:08,137 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:08,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:12:08,137 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1440881731, now seen corresponding path program 10 times [2020-10-27 20:12:08,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:08,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484152035] [2020-10-27 20:12:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:08,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:08,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:08,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:12:08,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:08,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 20:12:08,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:08,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:12:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:12:08,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:08,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:08,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:08,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:08,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:08,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:08,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:08,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:08,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:08,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:08,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:08,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484152035] [2020-10-27 20:12:08,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:08,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:12:08,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266985516] [2020-10-27 20:12:08,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:12:08,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:08,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:12:08,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:12:08,643 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-27 20:12:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:09,369 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-27 20:12:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:12:09,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 20:12:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:09,370 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:12:09,370 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:12:09,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:12:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:12:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 20:12:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:12:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-27 20:12:09,380 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 32 [2020-10-27 20:12:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:09,380 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-27 20:12:09,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:12:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-27 20:12:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:12:09,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:09,381 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:09,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:12:09,381 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1992008958, now seen corresponding path program 11 times [2020-10-27 20:12:09,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:09,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963869350] [2020-10-27 20:12:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:09,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:09,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:12:09,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:09,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 20:12:09,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:12:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:12:09,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:09,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:09,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:09,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:09,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:09,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:12:09,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:09,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:09,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963869350] [2020-10-27 20:12:09,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:09,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:12:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458607646] [2020-10-27 20:12:09,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:12:09,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:12:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:09,926 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 15 states. [2020-10-27 20:12:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:10,755 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 20:12:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:12:10,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 20:12:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:10,757 INFO L225 Difference]: With dead ends: 65 [2020-10-27 20:12:10,757 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:12:10,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:12:10,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:12:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 20:12:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:12:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-27 20:12:10,771 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 34 [2020-10-27 20:12:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:10,772 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-27 20:12:10,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:12:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-27 20:12:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:12:10,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:10,775 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:10,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:12:10,775 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:10,776 INFO L82 PathProgramCache]: Analyzing trace with hash -685218068, now seen corresponding path program 6 times [2020-10-27 20:12:10,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:10,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604296048] [2020-10-27 20:12:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:10,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:11,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:11,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:12:11,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 20:12:11,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:12:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:12:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:11,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:11,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:11,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:11,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:11,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:12:11,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:11,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:11,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604296048] [2020-10-27 20:12:11,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:11,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:12:11,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976068280] [2020-10-27 20:12:11,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:12:11,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:12:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:11,327 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-10-27 20:12:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:12,181 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-27 20:12:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:12:12,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 20:12:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:12,183 INFO L225 Difference]: With dead ends: 69 [2020-10-27 20:12:12,183 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:12:12,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:12:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:12:12,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 20:12:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:12:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-27 20:12:12,194 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 34 [2020-10-27 20:12:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:12,194 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-27 20:12:12,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:12:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-27 20:12:12,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:12:12,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:12,195 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:12,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:12:12,196 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 950670599, now seen corresponding path program 12 times [2020-10-27 20:12:12,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:12,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588271212] [2020-10-27 20:12:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:12,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:12,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:12,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:12:12,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:12,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-27 20:12:12,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:12,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:12:12,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:12,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:12:12,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:12,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:12,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:12,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:12,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:12,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:12,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:12,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:12,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:12,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:12,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:12,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588271212] [2020-10-27 20:12:12,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:12,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:12:12,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850812127] [2020-10-27 20:12:12,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:12:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:12:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:12:12,827 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 16 states. [2020-10-27 20:12:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:13,675 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-27 20:12:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:12:13,676 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-27 20:12:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:13,676 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:12:13,676 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:12:13,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:12:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:12:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 20:12:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:12:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 20:12:13,686 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 36 [2020-10-27 20:12:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:13,687 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 20:12:13,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:12:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 20:12:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:12:13,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:13,688 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:13,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:12:13,688 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1517723188, now seen corresponding path program 13 times [2020-10-27 20:12:13,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:13,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072818309] [2020-10-27 20:12:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:14,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:14,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:12:14,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:14,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-27 20:12:14,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:12:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:12:14,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:14,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:14,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:14,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072818309] [2020-10-27 20:12:14,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:14,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:12:14,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499399928] [2020-10-27 20:12:14,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:12:14,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:12:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:14,377 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-10-27 20:12:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:15,378 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 20:12:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:12:15,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 20:12:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:15,381 INFO L225 Difference]: With dead ends: 73 [2020-10-27 20:12:15,381 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:12:15,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:12:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:12:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 20:12:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:12:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-27 20:12:15,391 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 38 [2020-10-27 20:12:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:15,391 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-27 20:12:15,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:12:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-27 20:12:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:12:15,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:15,392 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:15,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:12:15,392 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1996231730, now seen corresponding path program 7 times [2020-10-27 20:12:15,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:15,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540175543] [2020-10-27 20:12:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:15,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:15,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:12:15,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:15,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-27 20:12:15,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:12:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:12:15,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:16,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:16,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:16,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:16,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:16,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:16,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:16,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:16,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:16,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540175543] [2020-10-27 20:12:16,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:16,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:12:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320459619] [2020-10-27 20:12:16,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:12:16,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:12:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:16,063 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 17 states. [2020-10-27 20:12:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:17,098 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-27 20:12:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:12:17,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 20:12:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:17,100 INFO L225 Difference]: With dead ends: 77 [2020-10-27 20:12:17,100 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:12:17,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:12:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:12:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 20:12:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:12:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-27 20:12:17,110 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 38 [2020-10-27 20:12:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:17,110 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-27 20:12:17,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:12:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-27 20:12:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:12:17,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:17,111 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:17,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:12:17,111 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1472762193, now seen corresponding path program 14 times [2020-10-27 20:12:17,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:17,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025859335] [2020-10-27 20:12:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:17,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:17,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:12:17,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:17,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-27 20:12:17,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:17,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:12:17,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:17,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:12:17,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:17,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:17,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:17,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:17,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:17,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:17,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:17,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:17,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:17,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:17,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:17,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:17,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025859335] [2020-10-27 20:12:17,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:17,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:12:17,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347554827] [2020-10-27 20:12:17,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:12:17,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:17,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:12:17,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:17,862 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 18 states. [2020-10-27 20:12:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:18,953 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 20:12:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:12:18,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 20:12:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:18,954 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:12:18,955 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:12:18,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:12:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:12:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 20:12:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:12:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-27 20:12:18,965 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 40 [2020-10-27 20:12:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:18,965 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-27 20:12:18,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:12:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-27 20:12:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:12:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:18,966 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:18,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:12:18,967 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1996092310, now seen corresponding path program 15 times [2020-10-27 20:12:18,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:18,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080028696] [2020-10-27 20:12:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:18,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:19,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:19,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:12:19,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:19,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-27 20:12:19,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:12:19,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:19,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:12:19,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:19,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:19,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:19,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:19,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:19,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:19,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:19,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080028696] [2020-10-27 20:12:19,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:19,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:12:19,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022143388] [2020-10-27 20:12:19,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:12:19,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:12:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:19,733 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 19 states. [2020-10-27 20:12:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:20,887 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-27 20:12:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:12:20,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 20:12:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:20,888 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:12:20,888 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:12:20,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:12:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:12:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 20:12:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:12:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-27 20:12:20,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 42 [2020-10-27 20:12:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:20,898 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-27 20:12:20,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:12:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-27 20:12:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:12:20,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:20,899 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:20,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:12:20,899 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:20,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2131471992, now seen corresponding path program 8 times [2020-10-27 20:12:20,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:20,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548548713] [2020-10-27 20:12:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:21,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:21,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:12:21,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:21,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-27 20:12:21,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:12:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:12:21,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:21,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:21,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:21,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:21,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:21,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:21,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:21,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:21,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:21,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:21,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548548713] [2020-10-27 20:12:21,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:21,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:12:21,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365565233] [2020-10-27 20:12:21,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:12:21,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:12:21,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:21,647 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 19 states. [2020-10-27 20:12:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:22,898 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-27 20:12:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:12:22,898 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 20:12:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:22,899 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:12:22,899 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:12:22,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:12:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:12:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 20:12:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:12:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-27 20:12:22,911 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 42 [2020-10-27 20:12:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:22,911 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-27 20:12:22,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:12:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-27 20:12:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:12:22,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:22,912 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:22,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:12:22,912 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:22,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1889806181, now seen corresponding path program 16 times [2020-10-27 20:12:22,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:22,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501365134] [2020-10-27 20:12:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:23,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:12:23,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:23,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:23,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:23,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:23,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:23,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:23,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:23,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:23,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:23,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:23,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:23,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:23,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501365134] [2020-10-27 20:12:23,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:23,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:12:23,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258740536] [2020-10-27 20:12:23,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:12:23,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:12:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:12:23,739 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2020-10-27 20:12:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:25,020 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-27 20:12:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:12:25,020 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-27 20:12:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:25,021 INFO L225 Difference]: With dead ends: 87 [2020-10-27 20:12:25,021 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:12:25,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:12:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:12:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 20:12:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:12:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-27 20:12:25,034 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 44 [2020-10-27 20:12:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:25,036 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-27 20:12:25,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:12:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-27 20:12:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:12:25,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:25,037 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:25,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:12:25,037 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:25,039 INFO L82 PathProgramCache]: Analyzing trace with hash 383291488, now seen corresponding path program 17 times [2020-10-27 20:12:25,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:25,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156046834] [2020-10-27 20:12:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:25,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:25,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:25,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:12:25,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 20:12:25,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:12:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:12:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:25,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:25,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:25,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:25,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:25,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:12:25,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:25,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:25,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:25,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:25,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:25,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156046834] [2020-10-27 20:12:25,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:25,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:12:25,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267833817] [2020-10-27 20:12:25,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:12:25,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:25,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:12:25,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:25,981 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 21 states. [2020-10-27 20:12:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:27,477 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-27 20:12:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:12:27,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 20:12:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:27,479 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:12:27,479 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:12:27,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:12:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:12:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 20:12:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:12:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-27 20:12:27,490 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 46 [2020-10-27 20:12:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:27,490 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-27 20:12:27,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:12:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-27 20:12:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:12:27,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:27,491 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:27,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:12:27,491 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:27,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1704506814, now seen corresponding path program 9 times [2020-10-27 20:12:27,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:27,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66375589] [2020-10-27 20:12:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:27,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:27,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:12:27,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:28,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:28,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:28,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:28,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:28,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:28,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:12:28,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:28,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:28,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:28,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:28,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:28,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66375589] [2020-10-27 20:12:28,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:28,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:12:28,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293494789] [2020-10-27 20:12:28,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:12:28,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:12:28,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:28,340 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 21 states. [2020-10-27 20:12:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:29,903 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-27 20:12:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:12:29,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 20:12:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:29,905 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:12:29,905 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:12:29,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:12:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:12:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 20:12:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:12:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-27 20:12:29,917 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 46 [2020-10-27 20:12:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:29,917 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-27 20:12:29,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:12:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-27 20:12:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:12:29,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:29,918 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:29,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:12:29,918 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1308202267, now seen corresponding path program 18 times [2020-10-27 20:12:29,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:29,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497054025] [2020-10-27 20:12:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:29,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:30,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:30,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:12:30,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-27 20:12:30,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:12:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:12:30,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:30,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:30,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:30,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:30,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:30,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:30,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:30,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:30,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497054025] [2020-10-27 20:12:30,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:30,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:12:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145359042] [2020-10-27 20:12:30,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:12:30,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:12:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:12:30,909 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 22 states. [2020-10-27 20:12:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:32,459 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-27 20:12:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:12:32,460 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-27 20:12:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:32,461 INFO L225 Difference]: With dead ends: 95 [2020-10-27 20:12:32,461 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:12:32,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:12:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:12:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 20:12:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:12:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-27 20:12:32,472 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 48 [2020-10-27 20:12:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:32,473 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-27 20:12:32,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:12:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-27 20:12:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:12:32,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:32,473 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:32,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:12:32,474 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash 958904362, now seen corresponding path program 19 times [2020-10-27 20:12:32,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:32,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993227294] [2020-10-27 20:12:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:32,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:32,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:32,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:12:32,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:32,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 20:12:32,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:12:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:12:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:12:33,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:33,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:33,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:33,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:33,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:33,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:33,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993227294] [2020-10-27 20:12:33,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:33,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:12:33,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036251630] [2020-10-27 20:12:33,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:12:33,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:12:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:33,484 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 23 states. [2020-10-27 20:12:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:35,221 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-27 20:12:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:12:35,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 20:12:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:35,223 INFO L225 Difference]: With dead ends: 97 [2020-10-27 20:12:35,223 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:12:35,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:12:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:12:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 20:12:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:12:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-27 20:12:35,235 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 50 [2020-10-27 20:12:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:35,235 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-27 20:12:35,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:12:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-27 20:12:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:12:35,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:35,236 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:35,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:12:35,237 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1541101052, now seen corresponding path program 10 times [2020-10-27 20:12:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:35,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986308425] [2020-10-27 20:12:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:35,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:35,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:12:35,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:35,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-27 20:12:35,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:35,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:12:35,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:35,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:12:35,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:36,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:36,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:36,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:36,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:36,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:36,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:36,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986308425] [2020-10-27 20:12:36,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:36,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:12:36,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083049503] [2020-10-27 20:12:36,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:12:36,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:12:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:36,284 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 23 states. [2020-10-27 20:12:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:38,160 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-27 20:12:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:12:38,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 20:12:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:38,162 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:12:38,162 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:12:38,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:12:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:12:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 20:12:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:12:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-27 20:12:38,173 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 50 [2020-10-27 20:12:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:38,173 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-27 20:12:38,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:12:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-27 20:12:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:12:38,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:38,174 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:38,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:12:38,175 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2099955759, now seen corresponding path program 20 times [2020-10-27 20:12:38,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:38,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383715006] [2020-10-27 20:12:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:38,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:38,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:12:38,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:39,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:39,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:39,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:39,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:39,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:39,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:39,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:39,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383715006] [2020-10-27 20:12:39,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:39,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:12:39,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375621725] [2020-10-27 20:12:39,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:12:39,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:12:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:12:39,413 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 24 states. [2020-10-27 20:12:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:41,223 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-27 20:12:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:12:41,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-27 20:12:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:41,224 INFO L225 Difference]: With dead ends: 103 [2020-10-27 20:12:41,224 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:12:41,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:12:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:12:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 20:12:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:12:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-27 20:12:41,234 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 52 [2020-10-27 20:12:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:41,234 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-27 20:12:41,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:12:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-27 20:12:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:12:41,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:41,235 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:41,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:12:41,235 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:41,235 INFO L82 PathProgramCache]: Analyzing trace with hash -861279500, now seen corresponding path program 21 times [2020-10-27 20:12:41,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:41,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345966830] [2020-10-27 20:12:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:41,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:41,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:41,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:12:41,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:41,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-27 20:12:41,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:12:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:12:41,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:42,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:42,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:42,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:42,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:42,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:42,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:42,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:42,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:42,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:42,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:42,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:42,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345966830] [2020-10-27 20:12:42,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:42,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:12:42,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77704026] [2020-10-27 20:12:42,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:12:42,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:42,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:12:42,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:12:42,470 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 25 states. [2020-10-27 20:12:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:44,409 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-27 20:12:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:12:44,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-27 20:12:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:44,410 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:12:44,411 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:12:44,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:12:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:12:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 20:12:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:12:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-27 20:12:44,422 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 54 [2020-10-27 20:12:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:44,423 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-27 20:12:44,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:12:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-27 20:12:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:12:44,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:44,423 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:44,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:12:44,424 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash 393284426, now seen corresponding path program 11 times [2020-10-27 20:12:44,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:44,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918365543] [2020-10-27 20:12:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:44,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:45,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:45,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:12:45,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:45,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-27 20:12:45,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:12:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:12:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:45,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:45,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:45,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:45,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:45,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:45,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:45,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:45,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918365543] [2020-10-27 20:12:45,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:45,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:12:45,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150302928] [2020-10-27 20:12:45,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:12:45,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:45,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:12:45,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:12:45,619 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 25 states. [2020-10-27 20:12:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:47,737 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-27 20:12:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:12:47,743 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-27 20:12:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:47,744 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:12:47,744 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:12:47,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:12:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:12:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 20:12:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:12:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-27 20:12:47,763 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 54 [2020-10-27 20:12:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:47,763 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-27 20:12:47,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:12:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-27 20:12:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:12:47,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:47,765 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:47,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:12:47,765 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 954953849, now seen corresponding path program 22 times [2020-10-27 20:12:47,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:47,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980849532] [2020-10-27 20:12:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:48,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:48,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:12:48,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-27 20:12:48,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:12:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:12:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:48,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:48,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:48,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:48,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:48,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:48,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:48,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:48,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:48,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:48,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:49,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980849532] [2020-10-27 20:12:49,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:49,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:12:49,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623077653] [2020-10-27 20:12:49,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:12:49,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:12:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:12:49,002 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 26 states. [2020-10-27 20:12:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:51,133 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-27 20:12:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:12:51,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 20:12:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:51,135 INFO L225 Difference]: With dead ends: 111 [2020-10-27 20:12:51,135 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:12:51,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:12:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:12:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 20:12:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:12:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-27 20:12:51,148 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 56 [2020-10-27 20:12:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:51,148 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-27 20:12:51,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:12:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-27 20:12:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:12:51,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:51,149 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:51,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:12:51,149 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1696487234, now seen corresponding path program 23 times [2020-10-27 20:12:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855741351] [2020-10-27 20:12:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:51,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:12:51,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:52,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:52,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:52,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:52,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:52,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:52,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:52,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:52,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:52,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:52,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:52,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855741351] [2020-10-27 20:12:52,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:52,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:12:52,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839548671] [2020-10-27 20:12:52,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:12:52,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:12:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:12:52,405 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 27 states. [2020-10-27 20:12:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:54,724 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-27 20:12:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:12:54,724 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 20:12:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:54,725 INFO L225 Difference]: With dead ends: 113 [2020-10-27 20:12:54,725 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:12:54,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:12:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:12:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 20:12:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:12:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-27 20:12:54,739 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 58 [2020-10-27 20:12:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:54,739 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-27 20:12:54,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:12:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-27 20:12:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:12:54,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:54,740 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:54,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:12:54,741 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1602181520, now seen corresponding path program 12 times [2020-10-27 20:12:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:54,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882725157] [2020-10-27 20:12:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:54,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:55,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:55,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:12:55,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:55,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-27 20:12:55,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:55,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:12:55,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:55,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:12:55,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:56,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:56,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:56,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:56,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:56,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:56,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:56,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:56,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882725157] [2020-10-27 20:12:56,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:56,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:12:56,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317102195] [2020-10-27 20:12:56,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:12:56,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:12:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:12:56,062 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 27 states. [2020-10-27 20:12:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:58,497 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-10-27 20:12:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:12:58,497 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 20:12:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:58,498 INFO L225 Difference]: With dead ends: 117 [2020-10-27 20:12:58,498 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:12:58,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:12:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:12:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 20:12:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:12:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-27 20:12:58,511 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 58 [2020-10-27 20:12:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:58,511 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-27 20:12:58,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:12:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-27 20:12:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:12:58,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:58,512 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:58,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:12:58,512 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1479205827, now seen corresponding path program 24 times [2020-10-27 20:12:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:58,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681105446] [2020-10-27 20:12:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:58,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:58,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:58,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:12:58,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-27 20:12:58,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:12:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:58,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:12:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:59,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:59,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:59,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:59,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:59,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:59,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:59,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:59,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:59,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681105446] [2020-10-27 20:12:59,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:59,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:12:59,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268338916] [2020-10-27 20:12:59,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:12:59,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:12:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:12:59,685 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 28 states. [2020-10-27 20:13:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:02,170 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2020-10-27 20:13:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:13:02,172 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-27 20:13:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:02,173 INFO L225 Difference]: With dead ends: 119 [2020-10-27 20:13:02,173 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:13:02,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:13:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:13:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 20:13:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:13:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-27 20:13:02,186 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 60 [2020-10-27 20:13:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:02,187 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-27 20:13:02,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:13:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-27 20:13:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:13:02,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:02,188 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:02,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:13:02,188 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:02,188 INFO L82 PathProgramCache]: Analyzing trace with hash -401510008, now seen corresponding path program 25 times [2020-10-27 20:13:02,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:02,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981842928] [2020-10-27 20:13:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:02,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:02,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:03,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:03,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:03,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:03,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:03,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:03,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:03,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:03,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:03,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:03,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:03,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:03,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981842928] [2020-10-27 20:13:03,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:03,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:13:03,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625320153] [2020-10-27 20:13:03,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:13:03,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:13:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:13:03,744 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 29 states. [2020-10-27 20:13:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:06,400 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-10-27 20:13:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:13:06,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 20:13:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:06,402 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:13:06,402 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:13:06,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:13:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:13:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 20:13:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:13:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-27 20:13:06,415 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 62 [2020-10-27 20:13:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:06,415 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-27 20:13:06,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:13:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-27 20:13:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:13:06,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:06,416 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:06,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:13:06,416 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1066472662, now seen corresponding path program 13 times [2020-10-27 20:13:06,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:06,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594087067] [2020-10-27 20:13:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:07,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:07,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:13:07,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:07,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-27 20:13:07,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:13:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:07,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:13:07,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:07,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:07,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:07,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:07,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:07,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:07,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:07,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:07,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:07,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:07,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:07,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594087067] [2020-10-27 20:13:07,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:07,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:13:07,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483045855] [2020-10-27 20:13:07,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:13:07,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:07,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:13:07,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:13:07,949 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 29 states. [2020-10-27 20:13:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:10,860 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2020-10-27 20:13:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:13:10,860 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 20:13:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:10,861 INFO L225 Difference]: With dead ends: 125 [2020-10-27 20:13:10,862 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:13:10,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:13:10,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:13:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 20:13:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:13:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-27 20:13:10,875 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 62 [2020-10-27 20:13:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:10,875 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-27 20:13:10,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:13:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-27 20:13:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:13:10,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:10,876 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:10,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:13:10,877 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash 411804173, now seen corresponding path program 26 times [2020-10-27 20:13:10,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:10,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522414497] [2020-10-27 20:13:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:10,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:11,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:11,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:13:11,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:11,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-27 20:13:11,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:11,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:13:11,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:11,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:13:11,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:12,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:12,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:12,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:12,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522414497] [2020-10-27 20:13:12,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:12,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:13:12,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852568008] [2020-10-27 20:13:12,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:13:12,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:12,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:13:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:13:12,704 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 30 states. [2020-10-27 20:13:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:15,539 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2020-10-27 20:13:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:13:15,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-27 20:13:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:15,541 INFO L225 Difference]: With dead ends: 127 [2020-10-27 20:13:15,541 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:13:15,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:13:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:13:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 20:13:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 20:13:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-27 20:13:15,554 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 64 [2020-10-27 20:13:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:15,554 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-27 20:13:15,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:13:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-27 20:13:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:13:15,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:15,555 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:15,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:13:15,556 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 322684242, now seen corresponding path program 27 times [2020-10-27 20:13:15,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:15,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375887056] [2020-10-27 20:13:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:15,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:16,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:13:16,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:17,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:17,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:17,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:17,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:17,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:17,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375887056] [2020-10-27 20:13:17,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:17,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:13:17,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930027278] [2020-10-27 20:13:17,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:13:17,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:13:17,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:17,268 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 31 states. [2020-10-27 20:13:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:20,291 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-10-27 20:13:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:13:20,291 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 20:13:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:20,293 INFO L225 Difference]: With dead ends: 129 [2020-10-27 20:13:20,293 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 20:13:20,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:13:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 20:13:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 20:13:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:13:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-27 20:13:20,306 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 66 [2020-10-27 20:13:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:20,306 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-27 20:13:20,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:13:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-27 20:13:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:13:20,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:20,307 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:20,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:13:20,307 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:20,308 INFO L82 PathProgramCache]: Analyzing trace with hash -30950116, now seen corresponding path program 14 times [2020-10-27 20:13:20,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:20,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348351569] [2020-10-27 20:13:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:20,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:13:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:21,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:21,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:21,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:21,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:21,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:21,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:21,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:21,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348351569] [2020-10-27 20:13:21,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:21,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:13:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363626902] [2020-10-27 20:13:21,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:13:21,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:21,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:13:21,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:21,890 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 31 states. [2020-10-27 20:13:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:25,147 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-27 20:13:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:13:25,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 20:13:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:25,149 INFO L225 Difference]: With dead ends: 133 [2020-10-27 20:13:25,149 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:13:25,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:13:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:13:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 20:13:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 20:13:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-27 20:13:25,163 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 66 [2020-10-27 20:13:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:25,163 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-27 20:13:25,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:13:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-27 20:13:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:13:25,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:25,164 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:25,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:13:25,164 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash 577776471, now seen corresponding path program 28 times [2020-10-27 20:13:25,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:25,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121028210] [2020-10-27 20:13:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:25,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:25,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:25,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:13:25,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:25,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-27 20:13:25,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:13:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:25,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:13:25,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:26,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:26,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:26,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:26,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:26,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:26,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:26,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:26,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:26,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:26,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:26,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121028210] [2020-10-27 20:13:26,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:26,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:13:26,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744847541] [2020-10-27 20:13:26,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:13:26,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:26,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:13:26,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:13:26,860 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 32 states. [2020-10-27 20:13:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:30,025 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-10-27 20:13:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:13:30,025 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-27 20:13:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:30,027 INFO L225 Difference]: With dead ends: 135 [2020-10-27 20:13:30,027 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:13:30,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:13:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:13:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-27 20:13:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 20:13:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-27 20:13:30,044 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 68 [2020-10-27 20:13:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:30,044 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-27 20:13:30,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:13:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-27 20:13:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:13:30,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:30,045 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:30,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:13:30,045 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:30,045 INFO L82 PathProgramCache]: Analyzing trace with hash 908272668, now seen corresponding path program 29 times [2020-10-27 20:13:30,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:30,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328394557] [2020-10-27 20:13:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:30,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:13:30,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:31,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:31,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:31,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328394557] [2020-10-27 20:13:31,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:31,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:13:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300896723] [2020-10-27 20:13:31,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:13:31,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:13:31,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:31,707 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 33 states. [2020-10-27 20:13:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:35,097 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-10-27 20:13:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:13:35,098 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 20:13:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:35,100 INFO L225 Difference]: With dead ends: 137 [2020-10-27 20:13:35,100 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 20:13:35,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:13:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 20:13:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-27 20:13:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 20:13:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-27 20:13:35,114 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 70 [2020-10-27 20:13:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:35,114 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-27 20:13:35,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:13:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-27 20:13:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:13:35,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:35,115 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:35,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:13:35,116 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash -989539742, now seen corresponding path program 15 times [2020-10-27 20:13:35,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:35,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615463847] [2020-10-27 20:13:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:35,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:35,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:13:35,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:36,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:36,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:36,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:36,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:36,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:13:36,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:36,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615463847] [2020-10-27 20:13:36,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:36,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:13:36,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207548132] [2020-10-27 20:13:36,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:13:36,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:36,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:13:36,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:36,851 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 33 states. [2020-10-27 20:13:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:40,584 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-10-27 20:13:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:13:40,585 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 20:13:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:40,586 INFO L225 Difference]: With dead ends: 141 [2020-10-27 20:13:40,586 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 20:13:40,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:13:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 20:13:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-27 20:13:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 20:13:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-27 20:13:40,601 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 70 [2020-10-27 20:13:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:40,601 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-27 20:13:40,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:13:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-27 20:13:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:13:40,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:40,603 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:40,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:13:40,603 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash 687538081, now seen corresponding path program 30 times [2020-10-27 20:13:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:40,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818389218] [2020-10-27 20:13:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:40,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:41,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:13:41,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:42,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:42,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:42,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:42,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:42,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818389218] [2020-10-27 20:13:42,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:42,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:13:42,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035667208] [2020-10-27 20:13:42,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:13:42,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:13:42,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:13:42,492 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 34 states. [2020-10-27 20:13:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:45,978 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2020-10-27 20:13:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:13:45,979 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-27 20:13:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:45,980 INFO L225 Difference]: With dead ends: 143 [2020-10-27 20:13:45,980 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 20:13:45,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:13:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 20:13:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-27 20:13:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 20:13:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-10-27 20:13:45,994 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 72 [2020-10-27 20:13:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:45,994 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-10-27 20:13:45,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:13:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-10-27 20:13:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:13:45,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:45,995 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:45,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:13:45,995 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash -985002522, now seen corresponding path program 31 times [2020-10-27 20:13:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:45,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497519750] [2020-10-27 20:13:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:47,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:47,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:47,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497519750] [2020-10-27 20:13:47,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:47,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:13:47,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992161590] [2020-10-27 20:13:47,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:13:47,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:13:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:13:47,976 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 35 states. [2020-10-27 20:13:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:51,841 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2020-10-27 20:13:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:13:51,841 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 20:13:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:51,843 INFO L225 Difference]: With dead ends: 145 [2020-10-27 20:13:51,843 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 20:13:51,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:13:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 20:13:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-27 20:13:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 20:13:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-27 20:13:51,856 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 74 [2020-10-27 20:13:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:51,856 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-27 20:13:51,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:13:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-27 20:13:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:13:51,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:51,857 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:51,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:13:51,857 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash 19518632, now seen corresponding path program 16 times [2020-10-27 20:13:51,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:51,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948126233] [2020-10-27 20:13:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:51,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:52,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:13:52,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:53,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:53,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:53,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948126233] [2020-10-27 20:13:53,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:53,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:13:53,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98945421] [2020-10-27 20:13:53,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:13:53,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:13:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:13:53,764 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 35 states. [2020-10-27 20:13:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:58,087 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-10-27 20:13:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:13:58,088 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 20:13:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:58,089 INFO L225 Difference]: With dead ends: 149 [2020-10-27 20:13:58,089 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 20:13:58,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:13:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 20:13:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-27 20:13:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 20:13:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-27 20:13:58,102 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 74 [2020-10-27 20:13:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:58,103 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-27 20:13:58,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:13:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-27 20:13:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:13:58,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:58,104 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:58,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:13:58,104 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1978753301, now seen corresponding path program 32 times [2020-10-27 20:13:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:58,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592488240] [2020-10-27 20:13:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:58,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:59,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:59,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 20:13:59,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:59,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-27 20:13:59,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:59,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:13:59,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:59,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:13:59,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:00,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:00,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:00,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:00,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:00,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:00,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592488240] [2020-10-27 20:14:00,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:00,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:14:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378199407] [2020-10-27 20:14:00,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:14:00,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:14:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:14:00,637 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 36 states. [2020-10-27 20:14:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:04,668 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-10-27 20:14:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:14:04,669 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-27 20:14:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:04,670 INFO L225 Difference]: With dead ends: 151 [2020-10-27 20:14:04,671 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 20:14:04,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:14:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 20:14:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-27 20:14:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 20:14:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-27 20:14:04,683 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 76 [2020-10-27 20:14:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:04,683 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-27 20:14:04,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:14:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-27 20:14:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:14:04,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:04,685 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:04,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:14:04,685 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash 804455088, now seen corresponding path program 33 times [2020-10-27 20:14:04,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:04,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425727316] [2020-10-27 20:14:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:05,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 904 [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:14:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:06,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:06,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425727316] [2020-10-27 20:14:06,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:06,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:14:06,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754053910] [2020-10-27 20:14:06,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:14:06,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:06,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:14:06,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:06,848 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 37 states. [2020-10-27 20:14:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:11,017 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-27 20:14:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:14:11,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 20:14:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:11,019 INFO L225 Difference]: With dead ends: 153 [2020-10-27 20:14:11,019 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 20:14:11,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:14:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 20:14:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-27 20:14:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 20:14:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-27 20:14:11,034 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 78 [2020-10-27 20:14:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:11,034 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-27 20:14:11,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:14:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-27 20:14:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:14:11,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:11,035 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:11,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:14:11,035 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1026014226, now seen corresponding path program 17 times [2020-10-27 20:14:11,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:11,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943643979] [2020-10-27 20:14:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:14:11,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:13,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:13,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:13,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:13,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:13,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:13,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:13,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943643979] [2020-10-27 20:14:13,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:13,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:14:13,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460702706] [2020-10-27 20:14:13,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:14:13,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:13,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:14:13,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:13,196 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 37 states. [2020-10-27 20:14:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:17,955 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2020-10-27 20:14:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:14:17,956 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 20:14:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:17,957 INFO L225 Difference]: With dead ends: 157 [2020-10-27 20:14:17,958 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 20:14:17,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:14:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 20:14:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-27 20:14:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 20:14:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-27 20:14:17,969 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 78 [2020-10-27 20:14:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:17,969 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-27 20:14:17,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:14:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-27 20:14:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 20:14:17,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:17,970 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:17,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:14:17,970 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:17,970 INFO L82 PathProgramCache]: Analyzing trace with hash -296908491, now seen corresponding path program 34 times [2020-10-27 20:14:17,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:17,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708023468] [2020-10-27 20:14:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:17,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:19,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:19,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 20:14:19,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-27 20:14:19,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:14:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:14:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:20,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:20,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:20,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:20,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:20,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708023468] [2020-10-27 20:14:20,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:20,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:14:20,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950668645] [2020-10-27 20:14:20,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:14:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:14:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:14:20,497 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 38 states. [2020-10-27 20:14:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:25,008 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-10-27 20:14:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:14:25,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-27 20:14:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:25,010 INFO L225 Difference]: With dead ends: 159 [2020-10-27 20:14:25,010 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 20:14:25,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:14:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 20:14:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-27 20:14:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 20:14:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2020-10-27 20:14:25,023 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 80 [2020-10-27 20:14:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:25,023 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2020-10-27 20:14:25,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:14:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2020-10-27 20:14:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:14:25,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:25,024 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:25,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:14:25,024 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2145353094, now seen corresponding path program 35 times [2020-10-27 20:14:25,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:25,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326004862] [2020-10-27 20:14:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:25,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:26,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:14:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:27,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:27,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:27,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:27,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:27,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326004862] [2020-10-27 20:14:27,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:27,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:14:27,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74797569] [2020-10-27 20:14:27,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:14:27,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:14:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:14:27,518 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 39 states. [2020-10-27 20:14:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:32,153 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2020-10-27 20:14:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:14:32,153 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 20:14:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:32,155 INFO L225 Difference]: With dead ends: 161 [2020-10-27 20:14:32,155 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 20:14:32,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:14:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 20:14:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-27 20:14:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 20:14:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-27 20:14:32,165 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 82 [2020-10-27 20:14:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:32,165 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-27 20:14:32,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:14:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-27 20:14:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:14:32,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:32,166 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:32,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:14:32,167 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash 496082996, now seen corresponding path program 18 times [2020-10-27 20:14:32,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:32,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539077540] [2020-10-27 20:14:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:32,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:33,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:33,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 20:14:33,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:33,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-27 20:14:33,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:33,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:14:33,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:33,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:14:33,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:34,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:34,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:34,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:34,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:34,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:34,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:34,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539077540] [2020-10-27 20:14:34,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:34,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:14:34,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028265704] [2020-10-27 20:14:34,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:14:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:14:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:14:34,521 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 39 states. [2020-10-27 20:14:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:39,753 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-10-27 20:14:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:14:39,754 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 20:14:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:39,756 INFO L225 Difference]: With dead ends: 165 [2020-10-27 20:14:39,756 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 20:14:39,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:14:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 20:14:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-27 20:14:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 20:14:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-27 20:14:39,767 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 82 [2020-10-27 20:14:39,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:39,767 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-27 20:14:39,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:14:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-27 20:14:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 20:14:39,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:39,768 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:39,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 20:14:39,769 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash -384156033, now seen corresponding path program 36 times [2020-10-27 20:14:39,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:39,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331402183] [2020-10-27 20:14:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:40,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:14:40,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:42,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:42,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:42,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331402183] [2020-10-27 20:14:42,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:42,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:14:42,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949667177] [2020-10-27 20:14:42,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:14:42,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:14:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:14:42,430 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 40 states. [2020-10-27 20:14:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:47,385 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2020-10-27 20:14:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:14:47,386 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-27 20:14:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:47,387 INFO L225 Difference]: With dead ends: 167 [2020-10-27 20:14:47,387 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 20:14:47,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:14:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 20:14:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-27 20:14:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 20:14:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-10-27 20:14:47,400 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 84 [2020-10-27 20:14:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:47,400 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-10-27 20:14:47,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:14:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-10-27 20:14:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:14:47,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:47,401 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:47,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 20:14:47,401 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -90895036, now seen corresponding path program 37 times [2020-10-27 20:14:47,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:47,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848633775] [2020-10-27 20:14:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:47,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:48,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:48,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:14:48,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:48,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-10-27 20:14:48,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:14:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:14:48,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:50,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:50,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:50,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:50,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:50,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:50,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:50,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:50,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:50,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:50,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:50,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848633775] [2020-10-27 20:14:50,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:50,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:14:50,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154062961] [2020-10-27 20:14:50,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:14:50,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:50,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:14:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:14:50,118 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 41 states. [2020-10-27 20:14:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:55,351 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-10-27 20:14:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:14:55,352 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 20:14:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:55,353 INFO L225 Difference]: With dead ends: 169 [2020-10-27 20:14:55,353 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 20:14:55,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:14:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 20:14:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-27 20:14:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 20:14:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-10-27 20:14:55,367 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 86 [2020-10-27 20:14:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:55,368 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-10-27 20:14:55,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:14:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-10-27 20:14:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:14:55,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:55,369 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:55,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 20:14:55,369 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2011731590, now seen corresponding path program 19 times [2020-10-27 20:14:55,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:55,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883083172] [2020-10-27 20:14:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:55,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:14:56,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:57,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:57,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:57,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883083172] [2020-10-27 20:14:57,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:57,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:14:57,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352958116] [2020-10-27 20:14:57,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:14:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:14:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:14:57,943 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 41 states. [2020-10-27 20:15:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:03,713 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2020-10-27 20:15:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:15:03,714 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 20:15:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:03,715 INFO L225 Difference]: With dead ends: 173 [2020-10-27 20:15:03,715 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 20:15:03,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:15:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 20:15:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-27 20:15:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 20:15:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-27 20:15:03,730 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 86 [2020-10-27 20:15:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:03,730 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-27 20:15:03,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:15:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-27 20:15:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 20:15:03,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:03,731 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:03,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 20:15:03,731 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:03,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1734918455, now seen corresponding path program 38 times [2020-10-27 20:15:03,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:03,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363458133] [2020-10-27 20:15:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:03,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:15:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:06,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:06,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:06,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:06,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:06,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:06,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:06,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:06,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:06,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:06,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:06,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:06,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363458133] [2020-10-27 20:15:06,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:06,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:15:06,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304522804] [2020-10-27 20:15:06,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:15:06,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:06,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:15:06,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:15:06,863 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 42 states. [2020-10-27 20:15:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:12,278 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2020-10-27 20:15:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:15:12,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-27 20:15:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:12,280 INFO L225 Difference]: With dead ends: 175 [2020-10-27 20:15:12,280 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 20:15:12,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:15:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 20:15:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-27 20:15:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 20:15:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-10-27 20:15:12,297 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 88 [2020-10-27 20:15:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:12,297 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-10-27 20:15:12,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:15:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-10-27 20:15:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 20:15:12,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:12,298 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:12,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 20:15:12,298 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1093459186, now seen corresponding path program 39 times [2020-10-27 20:15:12,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:12,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824691556] [2020-10-27 20:15:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:13,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1337 [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:15:13,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:15,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:15,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:15,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:15,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:15,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:15,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:15,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:15,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:15,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:15,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:15,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824691556] [2020-10-27 20:15:15,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:15,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:15:15,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422187187] [2020-10-27 20:15:15,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:15:15,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:15,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:15:15,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:15:15,344 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 43 states. [2020-10-27 20:15:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:21,067 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-10-27 20:15:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:15:21,068 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 20:15:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:21,069 INFO L225 Difference]: With dead ends: 177 [2020-10-27 20:15:21,070 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 20:15:21,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:15:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 20:15:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-10-27 20:15:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-27 20:15:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-10-27 20:15:21,085 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 90 [2020-10-27 20:15:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:21,086 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-10-27 20:15:21,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:15:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-10-27 20:15:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 20:15:21,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:21,087 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:21,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 20:15:21,087 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:21,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1013653440, now seen corresponding path program 20 times [2020-10-27 20:15:21,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:21,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886408914] [2020-10-27 20:15:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:21,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:22,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:22,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:15:22,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:22,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-27 20:15:22,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:22,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:15:22,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:22,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:15:22,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:23,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:23,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:23,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:23,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:23,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:23,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:23,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:23,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:23,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:23,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:23,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:23,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886408914] [2020-10-27 20:15:23,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:23,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:15:23,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534530405] [2020-10-27 20:15:23,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:15:23,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:23,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:15:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:15:23,889 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 43 states. [2020-10-27 20:15:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:30,373 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2020-10-27 20:15:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:15:30,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 20:15:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:30,375 INFO L225 Difference]: With dead ends: 181 [2020-10-27 20:15:30,375 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 20:15:30,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:15:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 20:15:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-27 20:15:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 20:15:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-27 20:15:30,392 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 90 [2020-10-27 20:15:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:30,392 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-27 20:15:30,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:15:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-27 20:15:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 20:15:30,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:30,393 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:30,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 20:15:30,393 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:30,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1168574995, now seen corresponding path program 40 times [2020-10-27 20:15:30,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:30,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095760770] [2020-10-27 20:15:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:30,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:31,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:31,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 20:15:31,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:31,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-27 20:15:31,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:15:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:15:31,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:33,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:33,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:33,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:33,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:33,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:33,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:33,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:33,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095760770] [2020-10-27 20:15:33,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:33,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:15:33,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705307271] [2020-10-27 20:15:33,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:15:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:15:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:15:33,573 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 44 states. [2020-10-27 20:15:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:39,703 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-10-27 20:15:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:15:39,704 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-27 20:15:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:39,705 INFO L225 Difference]: With dead ends: 183 [2020-10-27 20:15:39,705 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 20:15:39,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:15:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 20:15:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-27 20:15:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 20:15:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2020-10-27 20:15:39,720 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 92 [2020-10-27 20:15:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:39,720 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2020-10-27 20:15:39,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:15:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2020-10-27 20:15:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 20:15:39,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:39,721 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:39,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 20:15:39,722 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:39,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:39,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1729971160, now seen corresponding path program 41 times [2020-10-27 20:15:39,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:39,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78074054] [2020-10-27 20:15:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:41,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:41,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 20:15:41,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-27 20:15:41,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:15:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 20:15:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:43,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:43,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:43,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:43,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:43,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:43,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:43,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:43,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:43,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:43,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:43,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78074054] [2020-10-27 20:15:43,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:43,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:15:43,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718737034] [2020-10-27 20:15:43,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:15:43,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:15:43,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:15:43,299 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 45 states.