/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:10:28,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:10:28,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:10:28,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:10:28,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:10:28,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:10:28,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:10:28,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:10:28,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:10:28,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:10:28,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:10:28,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:10:28,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:10:28,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:10:28,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:10:28,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:10:28,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:10:28,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:10:28,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:10:28,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:10:28,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:10:28,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:10:28,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:10:28,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:10:28,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:10:28,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:10:28,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:10:28,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:10:28,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:10:28,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:10:28,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:10:28,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:10:28,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:10:28,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:10:28,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:10:28,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:10:28,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:10:28,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:10:28,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:10:28,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:10:28,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:10:28,792 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 [2020-10-28 15:10:28,847 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:10:28,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:10:28,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:10:28,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:10:28,853 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:10:28,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:10:28,853 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:10:28,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:10:28,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:10:28,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:10:28,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:10:28,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:10:28,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:10:28,855 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:10:28,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:10:28,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:10:28,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:10:28,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:10:28,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:10:28,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:10:28,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:10:28,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:10:28,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:10:28,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:10:28,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:10:28,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:10:28,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:10:28,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:10:28,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:10:28,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:10:29,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:10:29,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:10:29,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:10:29,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:10:29,318 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:10:29,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-28 15:10:29,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7ce3c0d0/7ec25f5e0b76405b9549549c7f2d441f/FLAGa809dd088 [2020-10-28 15:10:30,071 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:10:30,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-28 15:10:30,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7ce3c0d0/7ec25f5e0b76405b9549549c7f2d441f/FLAGa809dd088 [2020-10-28 15:10:30,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7ce3c0d0/7ec25f5e0b76405b9549549c7f2d441f [2020-10-28 15:10:30,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:10:30,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:10:30,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:10:30,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:10:30,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:10:30,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608a81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30, skipping insertion in model container [2020-10-28 15:10:30,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:10:30,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:10:30,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:10:30,646 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:10:30,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:10:30,679 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:10:30,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30 WrapperNode [2020-10-28 15:10:30,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:10:30,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:10:30,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:10:30,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:10:30,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (1/1) ... [2020-10-28 15:10:30,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:10:30,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:10:30,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:10:30,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:10:30,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (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 [2020-10-28 15:10:30,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:10:30,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:10:30,862 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:10:30,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:10:30,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:10:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:10:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:10:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:10:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:10:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:10:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:10:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:10:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:10:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:10:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:10:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:10:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:10:31,152 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:10:31,153 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:10:31,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:10:31 BoogieIcfgContainer [2020-10-28 15:10:31,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:10:31,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:10:31,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:10:31,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:10:31,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:10:30" (1/3) ... [2020-10-28 15:10:31,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609b4790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:10:31, skipping insertion in model container [2020-10-28 15:10:31,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:30" (2/3) ... [2020-10-28 15:10:31,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609b4790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:10:31, skipping insertion in model container [2020-10-28 15:10:31,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:10:31" (3/3) ... [2020-10-28 15:10:31,165 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2020-10-28 15:10:31,178 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:10:31,184 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:10:31,199 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:10:31,233 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:10:31,233 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:10:31,234 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:10:31,234 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:10:31,234 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:10:31,234 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:10:31,234 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:10:31,235 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:10:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 15:10:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:10:31,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:31,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:31,290 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1288774906, now seen corresponding path program 1 times [2020-10-28 15:10:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:31,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870445765] [2020-10-28 15:10:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:32,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:10:32,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:32,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-28 15:10:32,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:32,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:10:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:32,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:10:32,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:32,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:32,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:32,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:10:32,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:32,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:32,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:10:32,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870445765] [2020-10-28 15:10:32,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:32,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:10:32,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779521280] [2020-10-28 15:10:32,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:10:32,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:10:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:10:32,380 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-28 15:10:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:32,463 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-10-28 15:10:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:10:32,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:10:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:32,477 INFO L225 Difference]: With dead ends: 41 [2020-10-28 15:10:32,477 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:10:32,485 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 [2020-10-28 15:10:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:10:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 15:10:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:10:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-28 15:10:32,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2020-10-28 15:10:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:32,537 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-28 15:10:32,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:10:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-28 15:10:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:10:32,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:32,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:32,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:10:32,539 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1573877124, now seen corresponding path program 1 times [2020-10-28 15:10:32,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:32,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897511919] [2020-10-28 15:10:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:32,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:10:32,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:32,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 15:10:32,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:32,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:32,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:32,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:32,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:10:32,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:10:32,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:32,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:32,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:32,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:32,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:10:32,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:32,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:32,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:32,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:10:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:10:32,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897511919] [2020-10-28 15:10:32,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:32,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:32,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498912659] [2020-10-28 15:10:32,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:32,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:32,935 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-10-28 15:10:33,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:33,060 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-10-28 15:10:33,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:33,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 15:10:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:33,063 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:10:33,063 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:10:33,064 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 [2020-10-28 15:10:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:10:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:10:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:10:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-28 15:10:33,080 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2020-10-28 15:10:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:33,080 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-28 15:10:33,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-28 15:10:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:10:33,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:33,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:33,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:10:33,082 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -472522044, now seen corresponding path program 1 times [2020-10-28 15:10:33,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:33,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888812741] [2020-10-28 15:10:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:33,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:33,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:10:33,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:33,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 15:10:33,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:33,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:33,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:10:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:10:33,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:33,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:33,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:33,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:33,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:33,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:10:33,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:33,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:33,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:33,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:33,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:33,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:10:33,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888812741] [2020-10-28 15:10:33,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:33,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:10:33,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814938098] [2020-10-28 15:10:33,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:10:33,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:33,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:10:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:33,340 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2020-10-28 15:10:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:33,490 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-28 15:10:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:10:33,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 15:10:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:33,491 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:10:33,492 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 15:10:33,493 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 [2020-10-28 15:10:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 15:10:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 15:10:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:10:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-28 15:10:33,499 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-10-28 15:10:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:33,500 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-28 15:10:33,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:10:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-28 15:10:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:10:33,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:33,501 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:33,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:10:33,502 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash -690252932, now seen corresponding path program 2 times [2020-10-28 15:10:33,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:33,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150887140] [2020-10-28 15:10:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:33,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:10:33,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:33,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-28 15:10:33,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:33,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:10:33,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:33,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:33,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:33,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:33,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:10:33,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:33,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:33,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150887140] [2020-10-28 15:10:33,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:33,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715202917] [2020-10-28 15:10:33,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:33,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:33,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:33,999 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-10-28 15:10:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:34,082 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-28 15:10:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:34,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 15:10:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:34,084 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:10:34,084 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 15:10:34,085 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 [2020-10-28 15:10:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 15:10:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 15:10:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:10:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-28 15:10:34,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-10-28 15:10:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:34,092 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-28 15:10:34,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-28 15:10:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:10:34,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:34,093 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:34,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:10:34,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:34,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1503221049, now seen corresponding path program 1 times [2020-10-28 15:10:34,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:34,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685697086] [2020-10-28 15:10:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:34,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:10:34,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:34,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-28 15:10:34,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:34,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:34,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:10:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:10:34,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:34,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:34,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:34,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:34,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:10:34,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:34,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:34,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:34,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685697086] [2020-10-28 15:10:34,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:34,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488829724] [2020-10-28 15:10:34,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:34,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:34,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:34,521 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-28 15:10:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:34,635 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-28 15:10:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:34,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 15:10:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:34,637 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:10:34,637 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:10:34,638 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 [2020-10-28 15:10:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:10:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 15:10:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:10:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-28 15:10:34,644 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-28 15:10:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:34,644 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-28 15:10:34,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-28 15:10:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:10:34,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:34,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:34,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:10:34,646 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:34,647 INFO L82 PathProgramCache]: Analyzing trace with hash 209747444, now seen corresponding path program 1 times [2020-10-28 15:10:34,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:34,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955391633] [2020-10-28 15:10:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:34,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:10:35,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:10:35,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-28 15:10:35,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:10:35,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:35,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:10:35,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:35,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:35,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:35,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:35,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:35,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955391633] [2020-10-28 15:10:35,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:35,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:10:35,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373158530] [2020-10-28 15:10:35,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:10:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:10:35,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:35,154 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-10-28 15:10:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:35,274 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-28 15:10:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:10:35,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:10:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:35,275 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:10:35,275 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:10:35,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:10:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 15:10:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:10:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-28 15:10:35,283 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-28 15:10:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:35,284 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-28 15:10:35,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:10:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-28 15:10:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:10:35,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:35,285 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:35,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:10:35,285 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1831003855, now seen corresponding path program 2 times [2020-10-28 15:10:35,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:35,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380333860] [2020-10-28 15:10:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:10:35,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:10:35,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-28 15:10:35,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:10:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:10:35,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:35,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:35,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:35,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:10:35,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:35,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:35,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380333860] [2020-10-28 15:10:35,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:35,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:10:35,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787774475] [2020-10-28 15:10:35,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:10:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:10:35,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:10:35,890 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-28 15:10:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:36,038 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-28 15:10:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:10:36,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 15:10:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:36,039 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:10:36,039 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:10:36,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:10:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:10:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:10:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 15:10:36,047 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-10-28 15:10:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:36,047 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 15:10:36,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:10:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 15:10:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:10:36,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:36,048 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:36,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:10:36,048 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash -192947922, now seen corresponding path program 3 times [2020-10-28 15:10:36,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:36,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494017194] [2020-10-28 15:10:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:10:36,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:10:36,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-28 15:10:36,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:10:36,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:10:36,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:10:36,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:36,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:36,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:36,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:36,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:36,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:36,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:36,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:10:36,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494017194] [2020-10-28 15:10:36,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:36,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:10:36,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062028303] [2020-10-28 15:10:36,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:10:36,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:10:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:36,914 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-28 15:10:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:37,066 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-28 15:10:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:10:37,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 15:10:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:37,069 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:10:37,069 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:10:37,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:10:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-28 15:10:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:10:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 15:10:37,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-10-28 15:10:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:37,087 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 15:10:37,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:10:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 15:10:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:10:37,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:37,088 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:37,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:10:37,089 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2016028503, now seen corresponding path program 4 times [2020-10-28 15:10:37,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:37,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916472666] [2020-10-28 15:10:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:38,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:10:38,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:10:38,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-28 15:10:38,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:38,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:38,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:10:38,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:38,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:10:38,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:38,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:38,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:38,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:38,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:38,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:38,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:38,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:38,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 15:10:38,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916472666] [2020-10-28 15:10:38,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:38,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:10:38,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910100391] [2020-10-28 15:10:38,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:10:38,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:10:38,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:10:38,591 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2020-10-28 15:10:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:38,848 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-28 15:10:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:10:38,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-28 15:10:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:38,850 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:10:38,850 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:10:38,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:10:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-28 15:10:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:10:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-28 15:10:38,858 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2020-10-28 15:10:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:38,859 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-28 15:10:38,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:10:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-28 15:10:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:10:38,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:38,860 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:38,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:10:38,860 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:38,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1294312905, now seen corresponding path program 5 times [2020-10-28 15:10:38,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:38,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449103428] [2020-10-28 15:10:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:38,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:10:39,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:39,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-28 15:10:39,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:10:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:10:39,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:39,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:39,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:39,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:10:39,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:39,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:10:39,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449103428] [2020-10-28 15:10:39,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:39,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:10:39,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759383742] [2020-10-28 15:10:39,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:10:39,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:39,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:10:39,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:39,667 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2020-10-28 15:10:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:39,907 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-28 15:10:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:10:39,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-28 15:10:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:39,910 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:10:39,910 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:10:39,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:10:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 15:10:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:10:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-28 15:10:39,925 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2020-10-28 15:10:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:39,926 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-28 15:10:39,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:10:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-28 15:10:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:10:39,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:39,931 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:39,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:10:39,932 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1546579878, now seen corresponding path program 6 times [2020-10-28 15:10:39,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:39,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230391161] [2020-10-28 15:10:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:39,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:40,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:10:40,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 15:10:40,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:40,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:10:40,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:40,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:10:40,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:40,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:40,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:40,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:40,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:40,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:40,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:10:40,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230391161] [2020-10-28 15:10:40,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:40,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:10:40,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117555591] [2020-10-28 15:10:40,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:10:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:10:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:10:40,551 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-28 15:10:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:40,809 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-28 15:10:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:10:40,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 15:10:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:40,811 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:10:40,811 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:10:40,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:10:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 15:10:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:10:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 15:10:40,819 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2020-10-28 15:10:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:40,820 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 15:10:40,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:10:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 15:10:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:10:40,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:40,821 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:40,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:10:40,821 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:40,821 INFO L82 PathProgramCache]: Analyzing trace with hash 837994941, now seen corresponding path program 7 times [2020-10-28 15:10:40,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:40,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063903396] [2020-10-28 15:10:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:41,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:10:41,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-28 15:10:41,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:41,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:10:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:10:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:10:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:41,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:41,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:41,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:41,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:41,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:41,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:41,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:41,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:41,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:41,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:41,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:10:41,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063903396] [2020-10-28 15:10:41,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:41,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:10:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996172518] [2020-10-28 15:10:41,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:10:41,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:10:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:10:41,786 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 6 states. [2020-10-28 15:10:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:42,029 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-28 15:10:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:10:42,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-28 15:10:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:42,030 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:10:42,030 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:10:42,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:10:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-28 15:10:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:10:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 15:10:42,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2020-10-28 15:10:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:42,046 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 15:10:42,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:10:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 15:10:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:10:42,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:42,049 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:42,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:10:42,049 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:42,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1916963554, now seen corresponding path program 8 times [2020-10-28 15:10:42,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:42,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115255049] [2020-10-28 15:10:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:42,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:42,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:10:42,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:42,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-28 15:10:42,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:42,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:10:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:10:42,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:42,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:42,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:42,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:42,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:42,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:42,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:42,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:42,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:42,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:10:42,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115255049] [2020-10-28 15:10:42,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:42,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:10:42,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129604452] [2020-10-28 15:10:42,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:10:42,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:10:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:42,933 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-10-28 15:10:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:43,199 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-28 15:10:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:10:43,200 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-28 15:10:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:43,200 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:10:43,201 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:10:43,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:10:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-10-28 15:10:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:10:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-28 15:10:43,218 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 32 [2020-10-28 15:10:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:43,218 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-28 15:10:43,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:10:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-28 15:10:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:10:43,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:43,219 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:43,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:10:43,220 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:43,222 INFO L82 PathProgramCache]: Analyzing trace with hash 369356574, now seen corresponding path program 9 times [2020-10-28 15:10:43,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:43,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920398034] [2020-10-28 15:10:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:43,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:46,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:46,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:10:46,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:10:46,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3462 [2020-10-28 15:10:46,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:46,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:46,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:10:46,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:46,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:10:46,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:46,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:46,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:46,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:46,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:46,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:46,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:10:46,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:46,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:46,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 15:10:46,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920398034] [2020-10-28 15:10:46,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:46,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:10:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722899225] [2020-10-28 15:10:46,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:10:46,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:10:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:10:46,950 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 10 states. [2020-10-28 15:10:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:47,425 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-28 15:10:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:10:47,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-28 15:10:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:47,427 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:10:47,427 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:10:47,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:10:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:10:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-28 15:10:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:10:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-28 15:10:47,440 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 33 [2020-10-28 15:10:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:47,441 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-28 15:10:47,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:10:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-28 15:10:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:10:47,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:47,443 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:47,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:10:47,444 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash -361819550, now seen corresponding path program 10 times [2020-10-28 15:10:47,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:47,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564851885] [2020-10-28 15:10:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:48,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:10:48,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:48,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-28 15:10:48,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:48,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:10:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:10:48,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:48,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:48,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:48,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:48,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:48,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:10:48,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:48,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:48,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:48,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:48,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:48,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 15:10:48,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564851885] [2020-10-28 15:10:48,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:48,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:10:48,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872202381] [2020-10-28 15:10:48,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:10:48,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:48,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:10:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:48,719 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 9 states. [2020-10-28 15:10:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:49,026 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-10-28 15:10:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:10:49,026 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 15:10:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:49,027 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:10:49,027 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:10:49,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:10:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 15:10:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:10:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-28 15:10:49,042 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 34 [2020-10-28 15:10:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:49,042 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-28 15:10:49,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:10:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-28 15:10:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:10:49,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:49,043 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:49,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:10:49,043 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1907029381, now seen corresponding path program 11 times [2020-10-28 15:10:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:49,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276583404] [2020-10-28 15:10:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:49,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:49,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:50,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:50,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:10:50,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1523 [2020-10-28 15:10:50,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:50,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:10:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:10:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:50,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:50,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:50,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:50,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:50,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:50,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:50,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:50,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:50,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 15:10:50,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276583404] [2020-10-28 15:10:50,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:50,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:10:50,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290979982] [2020-10-28 15:10:50,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:10:50,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:10:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:10:50,705 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 10 states. [2020-10-28 15:10:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:51,068 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-28 15:10:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:10:51,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-28 15:10:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:51,071 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:10:51,071 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:10:51,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:10:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:10:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 15:10:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:10:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-28 15:10:51,093 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2020-10-28 15:10:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:51,093 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-28 15:10:51,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:10:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-28 15:10:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:10:51,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:51,096 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:51,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:10:51,096 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash 427465704, now seen corresponding path program 12 times [2020-10-28 15:10:51,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:51,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220785921] [2020-10-28 15:10:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:51,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:51,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:52,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:10:52,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-28 15:10:52,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:52,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:10:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:10:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:10:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:52,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:52,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:52,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:52,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:52,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:52,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 15:10:52,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220785921] [2020-10-28 15:10:52,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:52,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:10:52,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048541903] [2020-10-28 15:10:52,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:10:52,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:10:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:52,500 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2020-10-28 15:10:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:52,705 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-28 15:10:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:10:52,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-28 15:10:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:52,707 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:10:52,707 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 15:10:52,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 15:10:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-28 15:10:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:10:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-28 15:10:52,724 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 38 [2020-10-28 15:10:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:52,725 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-28 15:10:52,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:10:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-28 15:10:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:10:52,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:52,726 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:52,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:10:52,726 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1487996659, now seen corresponding path program 13 times [2020-10-28 15:10:52,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:52,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623363824] [2020-10-28 15:10:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:52,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:54,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:10:54,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:54,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-10-28 15:10:54,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:54,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:54,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:10:54,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:54,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:10:54,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:54,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:54,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:54,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:54,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:54,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:54,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:54,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:54,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:54,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:54,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:54,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 15:10:54,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623363824] [2020-10-28 15:10:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:54,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:10:54,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526512886] [2020-10-28 15:10:54,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:10:54,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:10:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:54,442 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 11 states. [2020-10-28 15:10:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:54,817 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2020-10-28 15:10:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:10:54,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-28 15:10:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:54,819 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:10:54,819 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:10:54,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:10:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:10:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 15:10:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:10:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-28 15:10:54,832 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 40 [2020-10-28 15:10:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:54,833 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-28 15:10:54,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:10:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-28 15:10:54,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:10:54,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:54,833 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:54,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:10:54,834 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:54,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:54,834 INFO L82 PathProgramCache]: Analyzing trace with hash -129059344, now seen corresponding path program 14 times [2020-10-28 15:10:54,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:54,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467592075] [2020-10-28 15:10:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:54,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:56,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:10:56,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:56,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:56,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:56,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:56,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:56,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:56,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:56,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:56,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-28 15:10:56,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467592075] [2020-10-28 15:10:56,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:56,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:10:56,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797122855] [2020-10-28 15:10:56,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:10:56,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:10:56,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:10:56,462 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2020-10-28 15:10:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:56,710 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-28 15:10:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:10:56,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-28 15:10:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:56,711 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:10:56,711 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:10:56,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:10:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-28 15:10:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 15:10:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-28 15:10:56,720 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 42 [2020-10-28 15:10:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:56,720 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-28 15:10:56,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:10:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-28 15:10:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:10:56,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:56,721 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:56,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:10:56,722 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash 562344213, now seen corresponding path program 15 times [2020-10-28 15:10:56,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:56,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304301412] [2020-10-28 15:10:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:56,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1890 [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:10:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:10:58,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:58,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:58,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 81 proven. 72 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 15:10:58,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304301412] [2020-10-28 15:10:58,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:58,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:10:58,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154674996] [2020-10-28 15:10:58,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:10:58,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:58,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:10:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:10:58,763 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2020-10-28 15:10:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:59,231 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-10-28 15:10:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:10:59,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-28 15:10:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:59,233 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:10:59,233 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:10:59,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:10:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:10:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 15:10:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:10:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-28 15:10:59,244 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 44 [2020-10-28 15:10:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:59,244 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-28 15:10:59,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:10:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-28 15:10:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:10:59,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:59,245 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:59,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:10:59,245 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1086669944, now seen corresponding path program 16 times [2020-10-28 15:10:59,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:59,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094043189] [2020-10-28 15:10:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1639 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:11:00,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:01,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:01,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:01,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:01,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:01,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:01,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 15:11:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094043189] [2020-10-28 15:11:01,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:01,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:11:01,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273796245] [2020-10-28 15:11:01,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:11:01,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:11:01,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:01,065 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 13 states. [2020-10-28 15:11:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:01,554 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-28 15:11:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:11:01,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-28 15:11:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:01,555 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:11:01,555 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:11:01,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:11:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:11:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 15:11:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:11:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-28 15:11:01,565 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 46 [2020-10-28 15:11:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:01,565 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-28 15:11:01,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:11:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-28 15:11:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:11:01,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:01,566 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:01,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:11:01,566 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1842443493, now seen corresponding path program 17 times [2020-10-28 15:11:01,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:01,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305101610] [2020-10-28 15:11:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:01,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1573 [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:11:03,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:11:03,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:03,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:03,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:03,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:03,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:03,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:03,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:03,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:03,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:03,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:03,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:03,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 110 proven. 25 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 15:11:03,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305101610] [2020-10-28 15:11:03,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:03,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:11:03,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309979498] [2020-10-28 15:11:03,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:11:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:03,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:11:03,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:11:03,245 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 9 states. [2020-10-28 15:11:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:03,565 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-10-28 15:11:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:11:03,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-28 15:11:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:03,570 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:11:03,570 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:11:03,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:11:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:11:03,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-28 15:11:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:11:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-28 15:11:03,583 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 48 [2020-10-28 15:11:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:03,584 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-28 15:11:03,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:11:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-28 15:11:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:11:03,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:03,589 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:03,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:11:03,589 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1027348608, now seen corresponding path program 18 times [2020-10-28 15:11:03,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:03,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028857749] [2020-10-28 15:11:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:03,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:05,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:05,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:11:05,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:05,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1589 [2020-10-28 15:11:05,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:05,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:11:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:11:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:05,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:05,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:05,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 15:11:05,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028857749] [2020-10-28 15:11:05,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:05,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:11:05,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951625098] [2020-10-28 15:11:05,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:11:05,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:11:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:11:05,385 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 14 states. [2020-10-28 15:11:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:05,918 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2020-10-28 15:11:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:11:05,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-28 15:11:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:05,921 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:11:05,921 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:11:05,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:11:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:11:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 15:11:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 15:11:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-28 15:11:05,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 50 [2020-10-28 15:11:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:05,933 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-28 15:11:05,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:11:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-28 15:11:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 15:11:05,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:05,934 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:05,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:11:05,934 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash 454239395, now seen corresponding path program 19 times [2020-10-28 15:11:05,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:05,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798766783] [2020-10-28 15:11:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:05,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:05,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2185 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:11:08,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:08,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:08,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:08,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:08,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:08,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:08,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-28 15:11:08,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798766783] [2020-10-28 15:11:08,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:08,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:11:08,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917340218] [2020-10-28 15:11:08,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:11:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:08,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:11:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:11:08,248 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 10 states. [2020-10-28 15:11:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:08,696 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-28 15:11:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:11:08,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-28 15:11:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:08,698 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:11:08,698 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 15:11:08,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:11:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 15:11:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-28 15:11:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 15:11:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-28 15:11:08,707 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 52 [2020-10-28 15:11:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:08,707 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-28 15:11:08,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:11:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-28 15:11:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 15:11:08,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:08,708 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:08,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:11:08,709 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1528283384, now seen corresponding path program 20 times [2020-10-28 15:11:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:08,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432810710] [2020-10-28 15:11:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:10,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:10,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:11:10,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:10,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2182 [2020-10-28 15:11:10,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:10,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:10,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:11:10,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:10,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:11:10,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:11,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:11,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:11,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:11,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:11,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:11,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 192 proven. 15 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 15:11:11,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432810710] [2020-10-28 15:11:11,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:11,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:11:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499176382] [2020-10-28 15:11:11,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:11:11,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:11:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:11,045 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 13 states. [2020-10-28 15:11:11,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:11,524 INFO L93 Difference]: Finished difference Result 135 states and 175 transitions. [2020-10-28 15:11:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:11:11,525 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-28 15:11:11,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:11,527 INFO L225 Difference]: With dead ends: 135 [2020-10-28 15:11:11,527 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 15:11:11,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:11:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 15:11:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2020-10-28 15:11:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 15:11:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-28 15:11:11,543 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 54 [2020-10-28 15:11:11,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:11,543 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-28 15:11:11,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:11:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-28 15:11:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 15:11:11,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:11,545 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:11,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:11:11,545 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash 175658248, now seen corresponding path program 21 times [2020-10-28 15:11:11,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:11,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282763504] [2020-10-28 15:11:11,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:11,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:14,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2722 [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:11:14,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:14,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:14,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:14,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:14,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:14,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:14,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 15:11:14,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282763504] [2020-10-28 15:11:14,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:14,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:11:14,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972526988] [2020-10-28 15:11:14,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:11:14,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:14,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:11:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:11:14,482 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 15 states. [2020-10-28 15:11:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:15,011 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2020-10-28 15:11:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:11:15,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-28 15:11:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:15,012 INFO L225 Difference]: With dead ends: 104 [2020-10-28 15:11:15,012 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:11:15,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:11:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:11:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 15:11:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:11:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-28 15:11:15,021 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 56 [2020-10-28 15:11:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:15,021 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-28 15:11:15,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:11:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-28 15:11:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 15:11:15,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:15,026 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:15,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:11:15,026 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1021318165, now seen corresponding path program 22 times [2020-10-28 15:11:15,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:15,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825421290] [2020-10-28 15:11:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:17,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:17,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2709 [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:11:17,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:17,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:17,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:17,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:17,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 15:11:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825421290] [2020-10-28 15:11:17,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:17,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:11:17,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675351506] [2020-10-28 15:11:17,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:11:17,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:17,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:11:17,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:11:17,963 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 16 states. [2020-10-28 15:11:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:18,615 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2020-10-28 15:11:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:11:18,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-28 15:11:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:18,617 INFO L225 Difference]: With dead ends: 106 [2020-10-28 15:11:18,617 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:11:18,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:11:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:11:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 15:11:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:11:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-28 15:11:18,627 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 58 [2020-10-28 15:11:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:18,628 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-28 15:11:18,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:11:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-28 15:11:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 15:11:18,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:18,628 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:18,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:11:18,629 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:18,629 INFO L82 PathProgramCache]: Analyzing trace with hash -264415730, now seen corresponding path program 23 times [2020-10-28 15:11:18,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:18,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103414649] [2020-10-28 15:11:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:18,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:21,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3121 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:11:21,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:21,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:21,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:21,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:21,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:21,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:21,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:21,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:21,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 195 proven. 49 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-28 15:11:21,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103414649] [2020-10-28 15:11:21,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:21,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:11:21,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219403216] [2020-10-28 15:11:21,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:11:21,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:21,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:11:21,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:11:21,881 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 11 states. [2020-10-28 15:11:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:22,336 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-28 15:11:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:11:22,337 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-28 15:11:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:22,338 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:11:22,338 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 15:11:22,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:11:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 15:11:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-28 15:11:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 15:11:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-28 15:11:22,350 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 60 [2020-10-28 15:11:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:22,350 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-28 15:11:22,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:11:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-28 15:11:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 15:11:22,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:22,351 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:22,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:11:22,351 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1639412621, now seen corresponding path program 24 times [2020-10-28 15:11:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:22,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246116649] [2020-10-28 15:11:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:22,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:22,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:25,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 15:11:25,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3170 [2020-10-28 15:11:25,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:25,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:11:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:11:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:25,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:25,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:25,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-28 15:11:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246116649] [2020-10-28 15:11:25,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:25,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:11:25,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300223434] [2020-10-28 15:11:25,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:11:25,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:25,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:11:25,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:11:25,756 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 17 states. [2020-10-28 15:11:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:26,478 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2020-10-28 15:11:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:11:26,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-28 15:11:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:26,480 INFO L225 Difference]: With dead ends: 112 [2020-10-28 15:11:26,480 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:11:26,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:11:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:11:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 15:11:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:11:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-28 15:11:26,495 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 62 [2020-10-28 15:11:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:26,496 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-28 15:11:26,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:11:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-28 15:11:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 15:11:26,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:26,497 INFO L422 BasicCegarLoop]: trace histogram [22, 14, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:26,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:11:26,498 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash -863097578, now seen corresponding path program 25 times [2020-10-28 15:11:26,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:26,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58219517] [2020-10-28 15:11:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:26,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:26,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:26,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:30,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 15:11:30,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3691 [2020-10-28 15:11:30,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:30,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:11:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:11:30,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:30,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:30,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:30,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:30,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:30,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:30,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:30,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:30,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:30,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:30,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-28 15:11:30,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58219517] [2020-10-28 15:11:30,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:30,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:11:30,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860535195] [2020-10-28 15:11:30,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:11:30,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:30,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:11:30,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:11:30,459 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 18 states. [2020-10-28 15:11:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:31,237 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-10-28 15:11:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:11:31,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-10-28 15:11:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:31,239 INFO L225 Difference]: With dead ends: 114 [2020-10-28 15:11:31,240 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:11:31,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:11:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:11:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 15:11:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:11:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-28 15:11:31,249 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 64 [2020-10-28 15:11:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:31,249 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-28 15:11:31,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:11:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-28 15:11:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:11:31,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:31,250 INFO L422 BasicCegarLoop]: trace histogram [23, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:31,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:11:31,250 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:31,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2146316537, now seen corresponding path program 26 times [2020-10-28 15:11:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:31,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887820292] [2020-10-28 15:11:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:31,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:35,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:35,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:11:35,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:35,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3825 [2020-10-28 15:11:35,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:35,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:11:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 15:11:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:11:35,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:35,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:35,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:35,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:35,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:35,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:35,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:35,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 255 proven. 64 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2020-10-28 15:11:35,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887820292] [2020-10-28 15:11:35,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:35,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:11:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766765081] [2020-10-28 15:11:35,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:11:35,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:11:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:11:35,219 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 12 states. [2020-10-28 15:11:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:35,687 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-28 15:11:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:11:35,688 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-28 15:11:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:35,690 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:11:35,690 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 15:11:35,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:11:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 15:11:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-28 15:11:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:11:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-28 15:11:35,699 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 66 [2020-10-28 15:11:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:35,699 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-28 15:11:35,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:11:35,699 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-28 15:11:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 15:11:35,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:35,700 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:35,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:11:35,700 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:35,701 INFO L82 PathProgramCache]: Analyzing trace with hash 86923422, now seen corresponding path program 27 times [2020-10-28 15:11:35,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:35,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151398957] [2020-10-28 15:11:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:35,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:35,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:35,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:39,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:39,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 15:11:39,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:39,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3914 [2020-10-28 15:11:39,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:39,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:11:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:11:39,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:39,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:39,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:39,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:39,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:39,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:39,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:39,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:39,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:39,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:39,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:39,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:39,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-28 15:11:39,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151398957] [2020-10-28 15:11:39,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:39,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:11:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237296303] [2020-10-28 15:11:39,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:11:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:11:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:11:39,889 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 19 states. [2020-10-28 15:11:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:40,825 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2020-10-28 15:11:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:11:40,826 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 68 [2020-10-28 15:11:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:40,827 INFO L225 Difference]: With dead ends: 120 [2020-10-28 15:11:40,827 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:11:40,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:11:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:11:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 15:11:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:11:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-10-28 15:11:40,837 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 68 [2020-10-28 15:11:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:40,838 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-10-28 15:11:40,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:11:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-10-28 15:11:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 15:11:40,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:40,839 INFO L422 BasicCegarLoop]: trace histogram [25, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:40,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:11:40,839 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1062449921, now seen corresponding path program 28 times [2020-10-28 15:11:40,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:40,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891116081] [2020-10-28 15:11:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:40,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3837 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:11:44,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:44,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:44,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:44,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:44,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 304 proven. 81 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-28 15:11:44,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891116081] [2020-10-28 15:11:44,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:44,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:11:44,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559380337] [2020-10-28 15:11:44,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:11:44,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:44,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:11:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:44,834 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 13 states. [2020-10-28 15:11:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:45,384 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-10-28 15:11:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:11:45,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-28 15:11:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:45,386 INFO L225 Difference]: With dead ends: 104 [2020-10-28 15:11:45,386 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 15:11:45,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:11:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 15:11:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-28 15:11:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 15:11:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-10-28 15:11:45,401 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 70 [2020-10-28 15:11:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:45,401 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-10-28 15:11:45,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:11:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-10-28 15:11:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 15:11:45,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:45,402 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:45,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:11:45,402 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:45,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2126808922, now seen corresponding path program 29 times [2020-10-28 15:11:45,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:45,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030467378] [2020-10-28 15:11:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:45,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:45,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:45,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:50,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:50,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 15:11:50,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:50,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4676 [2020-10-28 15:11:50,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:50,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:50,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:11:50,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:50,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 15:11:50,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:50,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:50,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:50,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:50,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:50,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:50,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:50,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:50,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:50,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 404 proven. 28 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-28 15:11:50,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030467378] [2020-10-28 15:11:50,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:50,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:11:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275201510] [2020-10-28 15:11:50,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:11:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:11:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:11:50,270 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 16 states. [2020-10-28 15:11:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:50,894 INFO L93 Difference]: Finished difference Result 207 states and 277 transitions. [2020-10-28 15:11:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:11:50,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-28 15:11:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:50,897 INFO L225 Difference]: With dead ends: 207 [2020-10-28 15:11:50,897 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 15:11:50,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:11:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 15:11:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 83. [2020-10-28 15:11:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 15:11:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-28 15:11:50,910 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 72 [2020-10-28 15:11:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:50,910 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-28 15:11:50,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:11:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-28 15:11:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:11:50,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:50,911 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:50,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:11:50,911 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:50,912 INFO L82 PathProgramCache]: Analyzing trace with hash 518233894, now seen corresponding path program 30 times [2020-10-28 15:11:50,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:50,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647406983] [2020-10-28 15:11:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:50,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:50,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:51,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:55,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:55,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:11:55,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:55,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:11:55,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:55,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:55,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:11:55,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:55,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:11:55,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:56,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:56,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:56,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:56,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:56,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:56,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:56,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 323 proven. 272 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 15:11:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647406983] [2020-10-28 15:11:56,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:56,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:11:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392021443] [2020-10-28 15:11:56,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:11:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:56,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:11:56,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:11:56,230 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 20 states. [2020-10-28 15:11:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:57,258 INFO L93 Difference]: Finished difference Result 130 states and 157 transitions. [2020-10-28 15:11:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:11:57,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-28 15:11:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:57,259 INFO L225 Difference]: With dead ends: 130 [2020-10-28 15:11:57,260 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:11:57,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:11:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:11:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-28 15:11:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:11:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-28 15:11:57,273 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 74 [2020-10-28 15:11:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:57,273 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-28 15:11:57,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:11:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-28 15:11:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 15:11:57,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:57,274 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:57,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:11:57,275 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash -819567799, now seen corresponding path program 31 times [2020-10-28 15:11:57,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:57,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787637015] [2020-10-28 15:11:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:57,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:57,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:12:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:02,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:02,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 15:12:02,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787637015] [2020-10-28 15:12:02,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:02,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:12:02,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059359395] [2020-10-28 15:12:02,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:12:02,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:02,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:12:02,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:12:02,622 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 21 states. [2020-10-28 15:12:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:03,669 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2020-10-28 15:12:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:12:03,670 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-10-28 15:12:03,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:03,671 INFO L225 Difference]: With dead ends: 132 [2020-10-28 15:12:03,671 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:12:03,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:12:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:12:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-28 15:12:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:12:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-28 15:12:03,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 76 [2020-10-28 15:12:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:03,683 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-28 15:12:03,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:12:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-28 15:12:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 15:12:03,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:03,684 INFO L422 BasicCegarLoop]: trace histogram [28, 18, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:03,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:12:03,685 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2043194028, now seen corresponding path program 32 times [2020-10-28 15:12:03,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:03,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733062853] [2020-10-28 15:12:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:03,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:08,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:12:08,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:08,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:08,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:08,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:08,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:08,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:08,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:08,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:08,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:08,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:08,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:08,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 378 proven. 100 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-28 15:12:08,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733062853] [2020-10-28 15:12:08,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:08,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:12:08,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768057948] [2020-10-28 15:12:08,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:12:08,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:12:08,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:12:08,869 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 14 states. [2020-10-28 15:12:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:09,527 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2020-10-28 15:12:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:12:09,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2020-10-28 15:12:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:09,529 INFO L225 Difference]: With dead ends: 114 [2020-10-28 15:12:09,529 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 15:12:09,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:12:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 15:12:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-28 15:12:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 15:12:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2020-10-28 15:12:09,542 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 78 [2020-10-28 15:12:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:09,542 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2020-10-28 15:12:09,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:12:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2020-10-28 15:12:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 15:12:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:09,543 INFO L422 BasicCegarLoop]: trace histogram [29, 18, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:09,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:12:09,544 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash 742804561, now seen corresponding path program 33 times [2020-10-28 15:12:09,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:09,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758734287] [2020-10-28 15:12:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:09,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:09,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:09,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:14,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:12:14,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:14,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:14,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 399 proven. 342 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-28 15:12:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758734287] [2020-10-28 15:12:14,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:14,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:12:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484338426] [2020-10-28 15:12:14,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:12:14,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:12:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:12:14,912 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand 22 states. [2020-10-28 15:12:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:16,078 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2020-10-28 15:12:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:12:16,079 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2020-10-28 15:12:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:16,080 INFO L225 Difference]: With dead ends: 138 [2020-10-28 15:12:16,080 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 15:12:16,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:12:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 15:12:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 15:12:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 15:12:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2020-10-28 15:12:16,094 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 80 [2020-10-28 15:12:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:16,095 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2020-10-28 15:12:16,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:12:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2020-10-28 15:12:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 15:12:16,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:16,102 INFO L422 BasicCegarLoop]: trace histogram [30, 19, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:16,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:12:16,103 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:16,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1545590220, now seen corresponding path program 34 times [2020-10-28 15:12:16,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:16,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936494290] [2020-10-28 15:12:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:16,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:16,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:16,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:12:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 15:12:21,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:12:21,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:21,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:21,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:21,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:21,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:21,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:21,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:21,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:21,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:21,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:21,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:21,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:21,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 437 proven. 121 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2020-10-28 15:12:21,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936494290] [2020-10-28 15:12:21,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:21,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:12:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964846354] [2020-10-28 15:12:21,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:12:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:21,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:12:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:12:21,296 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 15 states. [2020-10-28 15:12:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:21,997 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2020-10-28 15:12:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:12:21,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-28 15:12:21,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:21,998 INFO L225 Difference]: With dead ends: 118 [2020-10-28 15:12:21,999 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 15:12:22,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:12:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 15:12:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-28 15:12:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 15:12:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2020-10-28 15:12:22,014 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 82 [2020-10-28 15:12:22,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:22,014 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2020-10-28 15:12:22,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:12:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2020-10-28 15:12:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 15:12:22,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:22,015 INFO L422 BasicCegarLoop]: trace histogram [31, 19, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:22,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:12:22,015 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:22,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:22,016 INFO L82 PathProgramCache]: Analyzing trace with hash 779880921, now seen corresponding path program 35 times [2020-10-28 15:12:22,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:22,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490659853] [2020-10-28 15:12:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:22,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:22,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:12:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:12:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:27,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:27,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:27,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:27,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:27,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:27,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:27,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:27,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:27,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 460 proven. 380 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-10-28 15:12:27,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490659853] [2020-10-28 15:12:27,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:27,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:12:27,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262643982] [2020-10-28 15:12:27,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:12:27,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:27,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:12:27,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:12:27,424 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand 23 states. [2020-10-28 15:12:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:28,582 INFO L93 Difference]: Finished difference Result 144 states and 175 transitions. [2020-10-28 15:12:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:12:28,583 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-10-28 15:12:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:28,584 INFO L225 Difference]: With dead ends: 144 [2020-10-28 15:12:28,584 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 15:12:28,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:12:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 15:12:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-28 15:12:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 15:12:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2020-10-28 15:12:28,597 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 84 [2020-10-28 15:12:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:28,598 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2020-10-28 15:12:28,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:12:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2020-10-28 15:12:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 15:12:28,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:28,599 INFO L422 BasicCegarLoop]: trace histogram [32, 20, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:28,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:12:28,599 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1751006780, now seen corresponding path program 36 times [2020-10-28 15:12:28,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:28,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439299334] [2020-10-28 15:12:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:28,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 15:12:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:34,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:34,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:34,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 483 proven. 420 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-10-28 15:12:34,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439299334] [2020-10-28 15:12:34,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:34,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:12:34,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727757073] [2020-10-28 15:12:34,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:12:34,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:34,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:12:34,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:12:34,027 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand 24 states. [2020-10-28 15:12:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:35,269 INFO L93 Difference]: Finished difference Result 146 states and 177 transitions. [2020-10-28 15:12:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:12:35,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-10-28 15:12:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:35,271 INFO L225 Difference]: With dead ends: 146 [2020-10-28 15:12:35,271 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 15:12:35,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:12:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 15:12:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-28 15:12:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 15:12:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2020-10-28 15:12:35,283 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 86 [2020-10-28 15:12:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:35,284 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2020-10-28 15:12:35,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:12:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2020-10-28 15:12:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 15:12:35,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:35,285 INFO L422 BasicCegarLoop]: trace histogram [33, 21, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:35,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:12:35,285 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1299913249, now seen corresponding path program 37 times [2020-10-28 15:12:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:35,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495665194] [2020-10-28 15:12:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:35,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:40,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:40,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 15:12:40,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:40,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:12:40,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:40,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:40,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:12:40,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 15:12:40,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:12:40,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:40,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:40,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:40,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:40,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:40,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:40,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:40,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:40,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:40,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:40,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 525 proven. 144 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-28 15:12:40,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495665194] [2020-10-28 15:12:40,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:40,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:12:40,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111822986] [2020-10-28 15:12:40,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:12:40,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:40,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:12:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:12:40,510 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand 16 states. [2020-10-28 15:12:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:41,254 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-28 15:12:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:12:41,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2020-10-28 15:12:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:41,256 INFO L225 Difference]: With dead ends: 124 [2020-10-28 15:12:41,256 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:12:41,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:12:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:12:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-28 15:12:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 15:12:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2020-10-28 15:12:41,270 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 88 [2020-10-28 15:12:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:41,270 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2020-10-28 15:12:41,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:12:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2020-10-28 15:12:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 15:12:41,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:41,271 INFO L422 BasicCegarLoop]: trace histogram [34, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:41,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:12:41,272 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash 652248772, now seen corresponding path program 38 times [2020-10-28 15:12:41,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:41,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556797946] [2020-10-28 15:12:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:41,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:41,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:43,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:46,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 15:12:46,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:46,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:46,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:46,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:12:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 15:12:46,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:46,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:46,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:46,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:46,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:46,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:46,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:46,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:46,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 694 proven. 45 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-28 15:12:46,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556797946] [2020-10-28 15:12:46,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:46,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:12:46,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649335700] [2020-10-28 15:12:46,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:12:46,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:12:46,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:12:46,543 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand 20 states. [2020-10-28 15:12:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:47,368 INFO L93 Difference]: Finished difference Result 297 states and 406 transitions. [2020-10-28 15:12:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:12:47,369 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2020-10-28 15:12:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:47,372 INFO L225 Difference]: With dead ends: 297 [2020-10-28 15:12:47,372 INFO L226 Difference]: Without dead ends: 283 [2020-10-28 15:12:47,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:12:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-28 15:12:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 101. [2020-10-28 15:12:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 15:12:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-10-28 15:12:47,389 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 90 [2020-10-28 15:12:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:47,389 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-10-28 15:12:47,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:12:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-10-28 15:12:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 15:12:47,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:47,390 INFO L422 BasicCegarLoop]: trace histogram [34, 21, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:47,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:12:47,390 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -276980284, now seen corresponding path program 39 times [2020-10-28 15:12:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:47,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717762572] [2020-10-28 15:12:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:47,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:47,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:49,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:12:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:52,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:52,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:52,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 550 proven. 462 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 15:12:52,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717762572] [2020-10-28 15:12:52,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:52,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:12:52,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983764265] [2020-10-28 15:12:52,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:12:52,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:52,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:12:52,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:12:52,855 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 25 states. [2020-10-28 15:12:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:54,191 INFO L93 Difference]: Finished difference Result 156 states and 189 transitions. [2020-10-28 15:12:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:12:54,192 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 92 [2020-10-28 15:12:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:54,193 INFO L225 Difference]: With dead ends: 156 [2020-10-28 15:12:54,193 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 15:12:54,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:12:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 15:12:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-28 15:12:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 15:12:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-10-28 15:12:54,222 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 92 [2020-10-28 15:12:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:54,222 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-10-28 15:12:54,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:12:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-10-28 15:12:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 15:12:54,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:54,223 INFO L422 BasicCegarLoop]: trace histogram [35, 22, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:54,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:12:54,223 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:54,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1684193063, now seen corresponding path program 40 times [2020-10-28 15:12:54,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:54,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010813105] [2020-10-28 15:12:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:54,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:54,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 15:12:59,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:59,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:12:59,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:59,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:12:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:12:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:59,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:59,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:59,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:59,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:59,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:59,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:59,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:59,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 575 proven. 506 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 15:12:59,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010813105] [2020-10-28 15:12:59,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:59,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:12:59,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18993397] [2020-10-28 15:12:59,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:12:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:12:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:12:59,725 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 26 states. [2020-10-28 15:13:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:01,119 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2020-10-28 15:13:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:13:01,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-10-28 15:13:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:01,121 INFO L225 Difference]: With dead ends: 158 [2020-10-28 15:13:01,121 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 15:13:01,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:13:01,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 15:13:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-28 15:13:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 15:13:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-10-28 15:13:01,136 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 94 [2020-10-28 15:13:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:01,137 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-10-28 15:13:01,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:13:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-10-28 15:13:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 15:13:01,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:01,138 INFO L422 BasicCegarLoop]: trace histogram [36, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:01,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:13:01,138 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash 881136586, now seen corresponding path program 41 times [2020-10-28 15:13:01,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:01,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873107515] [2020-10-28 15:13:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:01,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:06,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:13:06,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:06,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:06,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:06,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:06,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 621 proven. 169 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2020-10-28 15:13:06,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873107515] [2020-10-28 15:13:06,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:06,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:13:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536199420] [2020-10-28 15:13:06,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:13:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:13:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:13:06,398 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 17 states. [2020-10-28 15:13:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:07,192 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2020-10-28 15:13:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:13:07,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-10-28 15:13:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:07,194 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:13:07,194 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 15:13:07,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:13:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 15:13:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-28 15:13:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 15:13:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2020-10-28 15:13:07,208 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 96 [2020-10-28 15:13:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:07,208 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2020-10-28 15:13:07,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:13:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2020-10-28 15:13:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 15:13:07,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:07,209 INFO L422 BasicCegarLoop]: trace histogram [37, 23, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:07,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:13:07,210 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:07,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1163505489, now seen corresponding path program 42 times [2020-10-28 15:13:07,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:07,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133794976] [2020-10-28 15:13:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:07,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:10,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:12,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 15:13:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:12,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:12,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:12,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:12,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:12,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:12,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:12,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:12,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:12,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 648 proven. 552 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-28 15:13:12,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133794976] [2020-10-28 15:13:12,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:12,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:13:12,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96606512] [2020-10-28 15:13:12,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:13:12,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:13:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:13:12,760 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand 27 states. [2020-10-28 15:13:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:14,370 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2020-10-28 15:13:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:13:14,370 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 98 [2020-10-28 15:13:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:14,372 INFO L225 Difference]: With dead ends: 164 [2020-10-28 15:13:14,372 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 15:13:14,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:13:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 15:13:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-28 15:13:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 15:13:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2020-10-28 15:13:14,386 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 98 [2020-10-28 15:13:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:14,386 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2020-10-28 15:13:14,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:13:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2020-10-28 15:13:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 15:13:14,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:14,387 INFO L422 BasicCegarLoop]: trace histogram [38, 24, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:14,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:13:14,387 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1383570386, now seen corresponding path program 43 times [2020-10-28 15:13:14,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:14,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968347240] [2020-10-28 15:13:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:19,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:13:19,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:19,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:19,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:19,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:19,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:19,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:19,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:19,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 696 proven. 196 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-10-28 15:13:19,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968347240] [2020-10-28 15:13:19,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:19,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:13:19,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140249493] [2020-10-28 15:13:19,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:13:19,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:19,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:13:19,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:13:19,653 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 18 states. [2020-10-28 15:13:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:20,595 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2020-10-28 15:13:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:13:20,596 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2020-10-28 15:13:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:20,597 INFO L225 Difference]: With dead ends: 138 [2020-10-28 15:13:20,598 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 15:13:20,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:13:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 15:13:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-28 15:13:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 15:13:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2020-10-28 15:13:20,613 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 100 [2020-10-28 15:13:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:20,613 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2020-10-28 15:13:20,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:13:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2020-10-28 15:13:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 15:13:20,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:20,614 INFO L422 BasicCegarLoop]: trace histogram [39, 24, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:20,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:13:20,615 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:20,615 INFO L82 PathProgramCache]: Analyzing trace with hash 639039159, now seen corresponding path program 44 times [2020-10-28 15:13:20,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:20,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145267027] [2020-10-28 15:13:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:20,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:24,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:25,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:25,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 15:13:25,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:25,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:13:25,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:25,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:13:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:13:25,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:26,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:26,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:26,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:26,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:26,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:26,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:13:26,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:26,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:26,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 725 proven. 600 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-10-28 15:13:26,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145267027] [2020-10-28 15:13:26,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:26,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:13:26,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424829038] [2020-10-28 15:13:26,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:13:26,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:26,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:13:26,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:13:26,204 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand 28 states. [2020-10-28 15:13:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:27,890 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2020-10-28 15:13:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:13:27,890 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2020-10-28 15:13:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:27,892 INFO L225 Difference]: With dead ends: 170 [2020-10-28 15:13:27,892 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 15:13:27,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:13:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 15:13:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-28 15:13:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 15:13:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2020-10-28 15:13:27,908 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 102 [2020-10-28 15:13:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:27,909 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2020-10-28 15:13:27,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:13:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2020-10-28 15:13:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 15:13:27,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:27,910 INFO L422 BasicCegarLoop]: trace histogram [40, 25, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:27,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:13:27,910 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1875380134, now seen corresponding path program 45 times [2020-10-28 15:13:27,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:27,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086731444] [2020-10-28 15:13:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:27,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:27,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:32,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:32,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:32,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 15:13:32,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:32,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 15:13:32,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:32,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:13:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 15:13:32,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:33,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:33,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 754 proven. 650 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-10-28 15:13:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086731444] [2020-10-28 15:13:33,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:33,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:13:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434729330] [2020-10-28 15:13:33,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:13:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:33,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:13:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:13:33,481 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 29 states. [2020-10-28 15:13:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:35,243 INFO L93 Difference]: Finished difference Result 172 states and 209 transitions. [2020-10-28 15:13:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:13:35,244 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 104 [2020-10-28 15:13:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:35,245 INFO L225 Difference]: With dead ends: 172 [2020-10-28 15:13:35,245 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 15:13:35,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:13:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 15:13:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-28 15:13:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 15:13:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2020-10-28 15:13:35,261 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 104 [2020-10-28 15:13:35,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:35,262 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2020-10-28 15:13:35,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:13:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2020-10-28 15:13:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 15:13:35,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:35,263 INFO L422 BasicCegarLoop]: trace histogram [41, 26, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:35,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:13:35,263 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:35,263 INFO L82 PathProgramCache]: Analyzing trace with hash -165733059, now seen corresponding path program 46 times [2020-10-28 15:13:35,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:35,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628482475] [2020-10-28 15:13:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:40,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:40,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 15:13:40,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:40,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:13:40,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:40,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:40,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:13:40,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:40,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:13:40,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:40,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:40,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:40,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:40,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:40,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 806 proven. 225 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-28 15:13:40,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628482475] [2020-10-28 15:13:40,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:40,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:13:40,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108182496] [2020-10-28 15:13:40,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:13:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:13:40,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:13:40,582 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand 19 states. [2020-10-28 15:13:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:41,534 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-28 15:13:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:13:41,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2020-10-28 15:13:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:41,537 INFO L225 Difference]: With dead ends: 144 [2020-10-28 15:13:41,537 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 15:13:41,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:13:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 15:13:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-28 15:13:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 15:13:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2020-10-28 15:13:41,551 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 106 [2020-10-28 15:13:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:41,552 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2020-10-28 15:13:41,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:13:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2020-10-28 15:13:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 15:13:41,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:41,553 INFO L422 BasicCegarLoop]: trace histogram [42, 26, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:41,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:13:41,553 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2112080226, now seen corresponding path program 47 times [2020-10-28 15:13:41,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:41,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649906710] [2020-10-28 15:13:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:41,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 15:13:46,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:47,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:47,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:47,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:47,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:47,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:13:47,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:47,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:47,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 837 proven. 702 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-28 15:13:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649906710] [2020-10-28 15:13:47,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:47,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:13:47,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828369149] [2020-10-28 15:13:47,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:13:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:13:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:13:47,203 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand 30 states. [2020-10-28 15:13:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:48,915 INFO L93 Difference]: Finished difference Result 178 states and 217 transitions. [2020-10-28 15:13:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:13:48,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 108 [2020-10-28 15:13:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:48,917 INFO L225 Difference]: With dead ends: 178 [2020-10-28 15:13:48,917 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 15:13:48,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:13:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 15:13:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-28 15:13:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 15:13:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2020-10-28 15:13:48,937 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 108 [2020-10-28 15:13:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:48,938 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2020-10-28 15:13:48,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:13:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2020-10-28 15:13:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 15:13:48,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:48,939 INFO L422 BasicCegarLoop]: trace histogram [43, 27, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:48,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:13:48,939 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1609055035, now seen corresponding path program 48 times [2020-10-28 15:13:48,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:48,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589323214] [2020-10-28 15:13:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:48,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:49,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:53,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 15:13:53,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:53,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:13:53,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:53,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:13:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 15:13:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:13:53,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:54,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:54,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:54,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 891 proven. 256 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2020-10-28 15:13:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589323214] [2020-10-28 15:13:54,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:54,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:13:54,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916473118] [2020-10-28 15:13:54,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:13:54,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:54,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:13:54,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:13:54,283 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 20 states. [2020-10-28 15:13:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:55,348 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2020-10-28 15:13:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:13:55,349 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2020-10-28 15:13:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:55,350 INFO L225 Difference]: With dead ends: 148 [2020-10-28 15:13:55,350 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 15:13:55,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:13:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 15:13:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-28 15:13:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 15:13:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2020-10-28 15:13:55,365 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 110 [2020-10-28 15:13:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:55,365 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2020-10-28 15:13:55,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:13:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2020-10-28 15:13:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 15:13:55,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:55,366 INFO L422 BasicCegarLoop]: trace histogram [44, 27, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:55,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:13:55,366 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1940869398, now seen corresponding path program 49 times [2020-10-28 15:13:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:55,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827293952] [2020-10-28 15:13:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:55,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:00,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 15:14:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:00,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:00,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:00,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:00,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:00,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:00,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:00,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:00,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1180 proven. 66 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-28 15:14:00,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827293952] [2020-10-28 15:14:00,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:00,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:14:00,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228478575] [2020-10-28 15:14:00,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:14:00,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:00,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:14:00,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:14:00,756 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand 24 states. [2020-10-28 15:14:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:01,864 INFO L93 Difference]: Finished difference Result 443 states and 618 transitions. [2020-10-28 15:14:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:14:01,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-10-28 15:14:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:01,867 INFO L225 Difference]: With dead ends: 443 [2020-10-28 15:14:01,867 INFO L226 Difference]: Without dead ends: 429 [2020-10-28 15:14:01,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:14:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-28 15:14:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 123. [2020-10-28 15:14:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 15:14:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2020-10-28 15:14:01,894 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 112 [2020-10-28 15:14:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:01,894 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2020-10-28 15:14:01,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:14:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2020-10-28 15:14:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 15:14:01,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:01,895 INFO L422 BasicCegarLoop]: trace histogram [44, 27, 17, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:01,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:14:01,896 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1182509974, now seen corresponding path program 50 times [2020-10-28 15:14:01,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:01,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128663267] [2020-10-28 15:14:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:01,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:02,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:06,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 15:14:06,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:07,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:07,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:07,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:07,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:07,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:07,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:07,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:07,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:07,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:07,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:07,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:07,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 924 proven. 756 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-10-28 15:14:07,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128663267] [2020-10-28 15:14:07,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:07,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:14:07,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463277146] [2020-10-28 15:14:07,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:14:07,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:07,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:14:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:14:07,598 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand 31 states. [2020-10-28 15:14:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:09,562 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2020-10-28 15:14:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:14:09,562 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 114 [2020-10-28 15:14:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:09,564 INFO L225 Difference]: With dead ends: 188 [2020-10-28 15:14:09,564 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 15:14:09,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:14:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 15:14:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-28 15:14:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 15:14:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2020-10-28 15:14:09,586 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 114 [2020-10-28 15:14:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:09,586 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2020-10-28 15:14:09,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:14:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2020-10-28 15:14:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 15:14:09,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:09,587 INFO L422 BasicCegarLoop]: trace histogram [45, 28, 17, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:09,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:14:09,587 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:09,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1519974797, now seen corresponding path program 51 times [2020-10-28 15:14:09,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:09,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699400000] [2020-10-28 15:14:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:09,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:09,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:14,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:14,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 15:14:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:15,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:15,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:15,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:15,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 957 proven. 812 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-10-28 15:14:15,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699400000] [2020-10-28 15:14:15,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:15,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:14:15,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106713796] [2020-10-28 15:14:15,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:14:15,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:15,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:14:15,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:14:15,336 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand 32 states. [2020-10-28 15:14:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:17,291 INFO L93 Difference]: Finished difference Result 190 states and 231 transitions. [2020-10-28 15:14:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:14:17,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 116 [2020-10-28 15:14:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:17,293 INFO L225 Difference]: With dead ends: 190 [2020-10-28 15:14:17,293 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 15:14:17,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:14:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 15:14:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-28 15:14:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 15:14:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-10-28 15:14:17,317 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 116 [2020-10-28 15:14:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:17,317 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-10-28 15:14:17,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:14:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-10-28 15:14:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 15:14:17,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:17,318 INFO L422 BasicCegarLoop]: trace histogram [46, 29, 17, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:17,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:14:17,319 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash 152625648, now seen corresponding path program 52 times [2020-10-28 15:14:17,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:17,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569693130] [2020-10-28 15:14:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:17,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 15:14:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:14:22,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:22,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:22,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:22,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:22,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:22,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:22,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:14:22,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:22,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2207 backedges. 1015 proven. 289 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-10-28 15:14:22,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569693130] [2020-10-28 15:14:22,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:22,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:14:22,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321997847] [2020-10-28 15:14:22,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:14:22,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:14:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:14:22,686 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 21 states. [2020-10-28 15:14:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:23,792 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2020-10-28 15:14:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:14:23,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 118 [2020-10-28 15:14:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:23,793 INFO L225 Difference]: With dead ends: 158 [2020-10-28 15:14:23,793 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 15:14:23,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:14:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 15:14:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-28 15:14:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 15:14:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2020-10-28 15:14:23,822 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 118 [2020-10-28 15:14:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:23,822 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2020-10-28 15:14:23,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:14:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2020-10-28 15:14:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 15:14:23,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:23,825 INFO L422 BasicCegarLoop]: trace histogram [47, 29, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:23,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:14:23,825 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1776871445, now seen corresponding path program 53 times [2020-10-28 15:14:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:23,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928052257] [2020-10-28 15:14:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking...