/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/float-benchs/zonotope_3.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:24:40,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:24:40,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:24:40,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:24:40,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:24:40,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:24:40,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:24:40,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:24:40,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:24:40,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:24:40,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:24:40,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:24:40,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:24:40,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:24:40,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:24:40,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:24:40,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:24:40,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:24:40,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:24:40,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:24:40,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:24:40,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:24:40,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:24:40,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:24:40,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:24:40,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:24:40,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:24:40,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:24:40,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:24:40,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:24:40,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:24:40,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:24:40,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:24:40,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:24:40,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:24:40,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:24:40,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:24:40,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:24:40,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:24:40,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:24:40,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:24:40,773 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 14:24:40,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:24:40,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:24:40,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:24:40,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:24:40,801 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:24:40,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:24:40,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:24:40,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:24:40,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:24:40,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:24:40,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:24:40,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:24:40,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:24:40,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:24:40,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:24:40,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:24:40,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:24:40,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:24:40,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:24:40,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:24:40,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:24:40,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:24:40,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:24:40,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:24:40,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:24:40,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:24:40,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:24:40,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:24:40,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:24:40,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:24:41,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:24:41,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:24:41,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:24:41,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:24:41,289 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:24:41,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2020-10-28 14:24:41,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a15595ad/2c9fc2f592354ee985dc8de0767ebe1a/FLAGf85fe5fdf [2020-10-28 14:24:42,135 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:24:42,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2020-10-28 14:24:42,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a15595ad/2c9fc2f592354ee985dc8de0767ebe1a/FLAGf85fe5fdf [2020-10-28 14:24:42,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a15595ad/2c9fc2f592354ee985dc8de0767ebe1a [2020-10-28 14:24:42,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:24:42,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:24:42,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:24:42,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:24:42,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:24:42,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:42,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5034e69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42, skipping insertion in model container [2020-10-28 14:24:42,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:42,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:24:42,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:24:42,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:24:42,848 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:24:42,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:24:42,977 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:24:42,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42 WrapperNode [2020-10-28 14:24:42,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:24:42,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:24:42,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:24:42,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:24:42,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:42,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:43,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:43,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:43,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:43,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:43,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (1/1) ... [2020-10-28 14:24:43,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:24:43,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:24:43,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:24:43,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:24:43,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (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 14:24:43,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:24:43,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:24:43,150 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:24:43,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 14:24:43,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:24:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:24:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:24:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:24:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:24:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-28 14:24:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 14:24:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:24:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-28 14:24:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-28 14:24:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:24:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:24:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:24:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:24:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:24:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:24:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:24:43,942 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:24:43,943 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:24:43,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:24:43 BoogieIcfgContainer [2020-10-28 14:24:43,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:24:43,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:24:43,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:24:43,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:24:43,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:24:42" (1/3) ... [2020-10-28 14:24:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b3657b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:24:43, skipping insertion in model container [2020-10-28 14:24:43,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:42" (2/3) ... [2020-10-28 14:24:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b3657b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:24:43, skipping insertion in model container [2020-10-28 14:24:43,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:24:43" (3/3) ... [2020-10-28 14:24:43,960 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2020-10-28 14:24:43,976 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:24:43,983 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:24:43,998 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:24:44,045 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:24:44,045 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:24:44,046 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:24:44,046 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:24:44,046 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:24:44,046 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:24:44,046 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:24:44,046 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:24:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-10-28 14:24:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:24:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:44,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:44,083 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:44,091 INFO L82 PathProgramCache]: Analyzing trace with hash -865449218, now seen corresponding path program 1 times [2020-10-28 14:24:44,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:44,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74510876] [2020-10-28 14:24:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:44,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:46,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:46,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:24:46,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:24:46,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2538 [2020-10-28 14:24:46,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:46,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:46,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:24:46,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 14:24:46,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:24:46,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:24:47,300 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:47,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:47,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:47,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:47,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:47,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:47,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:24:47,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:47,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:47,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:47,354 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 14:24:47,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74510876] [2020-10-28 14:24:47,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:24:47,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:24:47,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284343459] [2020-10-28 14:24:47,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:24:47,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:24:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:24:47,379 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 5 states. [2020-10-28 14:24:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:47,793 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2020-10-28 14:24:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:24:47,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-10-28 14:24:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:47,806 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:24:47,807 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:24:47,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:24:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:24:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 14:24:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:24:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-28 14:24:47,863 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2020-10-28 14:24:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:47,864 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-28 14:24:47,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:24:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-28 14:24:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:24:47,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:47,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:47,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:24:47,868 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash -397224071, now seen corresponding path program 1 times [2020-10-28 14:24:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:47,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286675803] [2020-10-28 14:24:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:47,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:48,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:48,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:24:48,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-28 14:24:48,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:48,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:24:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:24:48,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:48,854 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:48,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:48,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:48,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:48,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:24:48,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:48,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:48,896 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 14:24:48,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286675803] [2020-10-28 14:24:48,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:24:48,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-28 14:24:48,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366079649] [2020-10-28 14:24:48,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:24:48,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:48,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:24:48,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:24:48,923 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 13 states. [2020-10-28 14:24:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:49,173 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-28 14:24:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:24:49,173 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-28 14:24:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:49,175 INFO L225 Difference]: With dead ends: 70 [2020-10-28 14:24:49,175 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:24:49,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:24:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:24:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-28 14:24:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:24:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-28 14:24:49,188 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2020-10-28 14:24:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:49,189 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-28 14:24:49,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:24:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-28 14:24:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:24:49,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:49,191 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:49,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:24:49,191 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:49,192 INFO L82 PathProgramCache]: Analyzing trace with hash 883539006, now seen corresponding path program 1 times [2020-10-28 14:24:49,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:49,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575219572] [2020-10-28 14:24:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:49,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:49,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:50,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:50,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:24:50,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:24:50,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-28 14:24:50,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:50,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:50,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:24:50,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 14:24:50,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:24:50,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:50,580 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:50,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:50,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:50,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:50,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:50,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:50,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:24:50,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:50,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:50,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:50,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:50,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:50,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:24:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:50,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575219572] [2020-10-28 14:24:50,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:24:50,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:24:50,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66045565] [2020-10-28 14:24:50,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:24:50,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:50,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:24:50,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:24:50,644 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 4 states. [2020-10-28 14:24:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:50,827 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-28 14:24:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:24:50,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 14:24:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:50,830 INFO L225 Difference]: With dead ends: 73 [2020-10-28 14:24:50,830 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:24:50,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:24:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:24:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 14:24:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:24:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-28 14:24:50,849 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2020-10-28 14:24:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:50,850 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-28 14:24:50,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:24:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-28 14:24:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:24:50,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:50,854 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:50,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:24:50,855 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2039675801, now seen corresponding path program 1 times [2020-10-28 14:24:50,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:50,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970474710] [2020-10-28 14:24:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:51,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:51,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:24:51,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:51,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-28 14:24:51,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:51,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:51,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:24:51,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:51,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:24:51,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:51,895 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:51,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:51,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:51,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:51,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:51,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:24:51,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:51,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:51,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:51,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:51,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:51,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:51,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970474710] [2020-10-28 14:24:51,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:51,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:24:51,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551402749] [2020-10-28 14:24:51,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:24:51,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:51,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:24:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:24:51,937 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-28 14:24:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:52,233 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-28 14:24:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:24:52,233 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-28 14:24:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:52,234 INFO L225 Difference]: With dead ends: 73 [2020-10-28 14:24:52,235 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 14:24:52,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:24:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 14:24:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-28 14:24:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:24:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-28 14:24:52,245 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2020-10-28 14:24:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:52,245 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-28 14:24:52,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:24:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-28 14:24:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:24:52,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:52,247 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:52,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:24:52,248 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1432644473, now seen corresponding path program 2 times [2020-10-28 14:24:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:52,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747127121] [2020-10-28 14:24:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:52,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:52,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:52,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:24:52,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:52,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-28 14:24:52,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:52,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:24:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:52,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 14:24:52,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:53,402 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:53,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:53,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:53,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:53,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:53,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:53,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 14:24:53,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:53,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:53,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:53,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747127121] [2020-10-28 14:24:53,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:53,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:24:53,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114150855] [2020-10-28 14:24:53,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:24:53,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:53,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:24:53,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:24:53,464 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 15 states. [2020-10-28 14:24:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:53,724 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-28 14:24:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:24:53,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-28 14:24:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:53,726 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:24:53,726 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:24:53,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:24:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:24:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-28 14:24:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:24:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-28 14:24:53,736 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 60 [2020-10-28 14:24:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:53,737 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-28 14:24:53,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:24:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-28 14:24:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:24:53,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:53,738 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:53,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:24:53,738 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash 475916185, now seen corresponding path program 3 times [2020-10-28 14:24:53,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:53,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010017416] [2020-10-28 14:24:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:53,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:54,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:54,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:24:54,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:54,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-28 14:24:54,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:54,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:54,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:24:54,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:24:54,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:54,884 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:54,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:54,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:54,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:54,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:54,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:54,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:24:54,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:54,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:54,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:54,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010017416] [2020-10-28 14:24:54,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:54,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:24:54,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124710091] [2020-10-28 14:24:54,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:24:54,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:54,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:24:54,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:24:54,929 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 16 states. [2020-10-28 14:24:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:55,215 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-28 14:24:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:24:55,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-28 14:24:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:55,217 INFO L225 Difference]: With dead ends: 83 [2020-10-28 14:24:55,217 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:24:55,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:24:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:24:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-28 14:24:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:24:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-28 14:24:55,227 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 65 [2020-10-28 14:24:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:55,227 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-28 14:24:55,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:24:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-28 14:24:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 14:24:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:55,229 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:55,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:24:55,229 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1735590023, now seen corresponding path program 4 times [2020-10-28 14:24:55,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:55,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130899385] [2020-10-28 14:24:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:56,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:56,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:24:56,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:56,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-28 14:24:56,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:56,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:24:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 14:24:56,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:56,400 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:56,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:56,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:56,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:56,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:56,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:56,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:24:56,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:56,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:56,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:56,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:56,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:56,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:56,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130899385] [2020-10-28 14:24:56,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:56,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:24:56,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945841119] [2020-10-28 14:24:56,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:24:56,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:24:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:24:56,439 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2020-10-28 14:24:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:56,671 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-28 14:24:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:24:56,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-28 14:24:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:56,672 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:24:56,672 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:24:56,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:24:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:24:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-28 14:24:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:24:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 14:24:56,687 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 70 [2020-10-28 14:24:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:56,687 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 14:24:56,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:24:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 14:24:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 14:24:56,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:56,691 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:56,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:24:56,691 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 527553433, now seen corresponding path program 5 times [2020-10-28 14:24:56,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:56,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235557644] [2020-10-28 14:24:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:57,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:57,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 14:24:57,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:57,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-28 14:24:57,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:57,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:57,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:24:57,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:57,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 14:24:57,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:58,019 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:58,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:58,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:58,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:58,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:58,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:24:58,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:58,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:58,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:58,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235557644] [2020-10-28 14:24:58,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:58,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:24:58,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969267745] [2020-10-28 14:24:58,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:24:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:24:58,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:24:58,059 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 18 states. [2020-10-28 14:24:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:58,323 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-28 14:24:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:24:58,324 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-28 14:24:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:58,326 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:24:58,326 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:24:58,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:24:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:24:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-28 14:24:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:24:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-28 14:24:58,342 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 75 [2020-10-28 14:24:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:58,345 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-28 14:24:58,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:24:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-28 14:24:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 14:24:58,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:58,346 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:58,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:24:58,347 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1091343225, now seen corresponding path program 6 times [2020-10-28 14:24:58,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:58,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124772435] [2020-10-28 14:24:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:58,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:59,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:59,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 14:24:59,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:59,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-28 14:24:59,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:59,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:59,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:24:59,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:59,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 14:24:59,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:59,652 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:24:59,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:59,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:59,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:59,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:59,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:24:59,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:59,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:59,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124772435] [2020-10-28 14:24:59,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:59,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:24:59,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274605459] [2020-10-28 14:24:59,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:24:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:24:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:24:59,700 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2020-10-28 14:24:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:59,960 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-28 14:24:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:24:59,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-10-28 14:24:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:59,962 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:24:59,962 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 14:24:59,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:24:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 14:24:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-28 14:24:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:24:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-28 14:24:59,980 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 80 [2020-10-28 14:24:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:59,980 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-28 14:24:59,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:24:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-28 14:24:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 14:24:59,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:59,982 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:59,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:24:59,982 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2072952729, now seen corresponding path program 7 times [2020-10-28 14:24:59,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:59,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850079985] [2020-10-28 14:24:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:00,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:00,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:00,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 14:25:00,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:00,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-28 14:25:00,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:00,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:00,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:25:00,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:00,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:25:00,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:01,476 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:01,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:01,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:01,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:01,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:01,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:01,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:25:01,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:01,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:01,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:25:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:01,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850079985] [2020-10-28 14:25:01,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:01,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:25:01,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340838606] [2020-10-28 14:25:01,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:25:01,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:25:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:25:01,536 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 20 states. [2020-10-28 14:25:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:01,813 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-28 14:25:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:25:01,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-28 14:25:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:01,814 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:25:01,815 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:25:01,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:25:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:25:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-28 14:25:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 14:25:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-28 14:25:01,831 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2020-10-28 14:25:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:01,831 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-28 14:25:01,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:25:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-28 14:25:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 14:25:01,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:01,833 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:01,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:25:01,833 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:01,834 INFO L82 PathProgramCache]: Analyzing trace with hash -836556935, now seen corresponding path program 8 times [2020-10-28 14:25:01,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:01,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85429353] [2020-10-28 14:25:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:01,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:02,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:02,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 14:25:02,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:02,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-28 14:25:02,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:02,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:02,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:25:02,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:02,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 14:25:02,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:03,336 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:03,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:03,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:03,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:03,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:03,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:25:03,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:03,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:03,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:03,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:03,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:03,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:03,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85429353] [2020-10-28 14:25:03,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:03,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:25:03,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623854878] [2020-10-28 14:25:03,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:25:03,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:03,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:25:03,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:25:03,384 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 21 states. [2020-10-28 14:25:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:03,633 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-28 14:25:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:25:03,633 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2020-10-28 14:25:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:03,634 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:25:03,634 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 14:25:03,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:25:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 14:25:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-28 14:25:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:25:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-28 14:25:03,649 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 90 [2020-10-28 14:25:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:03,649 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-28 14:25:03,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:25:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-28 14:25:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 14:25:03,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:03,651 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:03,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:25:03,652 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash 963947417, now seen corresponding path program 9 times [2020-10-28 14:25:03,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:03,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936154903] [2020-10-28 14:25:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:03,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:04,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:04,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 14:25:04,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-28 14:25:04,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:04,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:25:04,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:04,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 14:25:04,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:05,150 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:05,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:05,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:05,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:05,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:05,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:25:05,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:05,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:05,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:05,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936154903] [2020-10-28 14:25:05,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:05,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:25:05,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234987746] [2020-10-28 14:25:05,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:25:05,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:25:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:25:05,198 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 22 states. [2020-10-28 14:25:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:05,446 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-28 14:25:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:25:05,446 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 95 [2020-10-28 14:25:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:05,447 INFO L225 Difference]: With dead ends: 113 [2020-10-28 14:25:05,448 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:25:05,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:25:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:25:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-28 14:25:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:25:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-28 14:25:05,456 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 95 [2020-10-28 14:25:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:05,457 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-28 14:25:05,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:25:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-28 14:25:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 14:25:05,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:05,458 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:05,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:25:05,458 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:05,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:05,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1357857927, now seen corresponding path program 10 times [2020-10-28 14:25:05,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:05,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980959527] [2020-10-28 14:25:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:05,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 14:25:06,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-28 14:25:06,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:06,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:25:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 14:25:06,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:07,089 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:07,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:07,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:07,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:07,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:07,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:07,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:25:07,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:07,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:07,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:07,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980959527] [2020-10-28 14:25:07,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:07,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:25:07,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195328421] [2020-10-28 14:25:07,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:25:07,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:25:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:25:07,139 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 23 states. [2020-10-28 14:25:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:07,378 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-28 14:25:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:25:07,378 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 100 [2020-10-28 14:25:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:07,379 INFO L225 Difference]: With dead ends: 118 [2020-10-28 14:25:07,380 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 14:25:07,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:25:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 14:25:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-28 14:25:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:25:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-28 14:25:07,388 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 100 [2020-10-28 14:25:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:07,388 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-28 14:25:07,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:25:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-28 14:25:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 14:25:07,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:07,390 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:07,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:25:07,390 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:07,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1910740889, now seen corresponding path program 11 times [2020-10-28 14:25:07,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:07,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969272444] [2020-10-28 14:25:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:07,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:08,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:08,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 14:25:08,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:08,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-28 14:25:08,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:08,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:25:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 14:25:08,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:09,016 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:09,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:09,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:09,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:09,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:09,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:09,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:25:09,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:09,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:09,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:09,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:09,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:09,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:09,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969272444] [2020-10-28 14:25:09,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:09,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:25:09,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722483066] [2020-10-28 14:25:09,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:25:09,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:09,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:25:09,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:25:09,068 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 24 states. [2020-10-28 14:25:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:09,421 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-10-28 14:25:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:25:09,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-10-28 14:25:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:09,423 INFO L225 Difference]: With dead ends: 123 [2020-10-28 14:25:09,423 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:25:09,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:25:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:25:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-28 14:25:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:25:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-28 14:25:09,439 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 105 [2020-10-28 14:25:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:09,440 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-28 14:25:09,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:25:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-28 14:25:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 14:25:09,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:09,441 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:09,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:25:09,442 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:09,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1125470073, now seen corresponding path program 12 times [2020-10-28 14:25:09,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:09,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053694892] [2020-10-28 14:25:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:09,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:10,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:10,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 14:25:10,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:10,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1182 [2020-10-28 14:25:10,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:10,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:25:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-28 14:25:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:11,248 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:11,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:11,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:11,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:11,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:11,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:11,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:25:11,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:11,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:11,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:11,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053694892] [2020-10-28 14:25:11,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:11,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:25:11,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174585052] [2020-10-28 14:25:11,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:25:11,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:25:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:25:11,294 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 25 states. [2020-10-28 14:25:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:11,576 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-10-28 14:25:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:25:11,576 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 110 [2020-10-28 14:25:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:11,578 INFO L225 Difference]: With dead ends: 128 [2020-10-28 14:25:11,578 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 14:25:11,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:25:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 14:25:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-28 14:25:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:25:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-28 14:25:11,586 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 110 [2020-10-28 14:25:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:11,587 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-28 14:25:11,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:25:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-28 14:25:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 14:25:11,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:11,588 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:11,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:25:11,588 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1302037401, now seen corresponding path program 13 times [2020-10-28 14:25:11,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:11,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490568800] [2020-10-28 14:25:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:11,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:12,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:12,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 14:25:12,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:12,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-28 14:25:12,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:12,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:12,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:25:12,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:12,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 14:25:12,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:13,280 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:13,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:13,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:13,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:13,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490568800] [2020-10-28 14:25:13,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:13,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:25:13,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826939626] [2020-10-28 14:25:13,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:25:13,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:25:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:25:13,320 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 26 states. [2020-10-28 14:25:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:13,648 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-28 14:25:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:25:13,649 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 115 [2020-10-28 14:25:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:13,651 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:25:13,651 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:25:13,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:25:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:25:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-28 14:25:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 14:25:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-28 14:25:13,659 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 115 [2020-10-28 14:25:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:13,659 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-28 14:25:13,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:25:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-28 14:25:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 14:25:13,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:13,661 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:13,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:25:13,661 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash -646913159, now seen corresponding path program 14 times [2020-10-28 14:25:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:13,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962829285] [2020-10-28 14:25:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:13,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:14,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:14,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-28 14:25:14,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:15,318 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:15,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:15,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:15,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:15,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:15,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:25:15,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:15,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:15,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:15,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:15,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:15,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:15,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962829285] [2020-10-28 14:25:15,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:15,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:25:15,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352398520] [2020-10-28 14:25:15,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:25:15,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:25:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:25:15,366 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 27 states. [2020-10-28 14:25:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:15,699 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-10-28 14:25:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:25:15,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 120 [2020-10-28 14:25:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:15,701 INFO L225 Difference]: With dead ends: 138 [2020-10-28 14:25:15,701 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 14:25:15,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:25:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 14:25:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-28 14:25:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:25:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-28 14:25:15,709 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 120 [2020-10-28 14:25:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:15,710 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-28 14:25:15,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:25:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-28 14:25:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 14:25:15,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:15,712 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:15,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:25:15,712 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:15,713 INFO L82 PathProgramCache]: Analyzing trace with hash 89943961, now seen corresponding path program 15 times [2020-10-28 14:25:15,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:15,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175843921] [2020-10-28 14:25:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:15,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:16,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:16,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 14:25:16,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:16,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-28 14:25:16,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:16,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:25:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 14:25:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:17,450 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:17,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:17,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:17,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:17,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:25:17,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:17,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:17,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:17,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175843921] [2020-10-28 14:25:17,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:17,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:25:17,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319733690] [2020-10-28 14:25:17,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:25:17,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:25:17,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:25:17,519 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 28 states. [2020-10-28 14:25:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:17,896 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2020-10-28 14:25:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:25:17,897 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2020-10-28 14:25:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:17,899 INFO L225 Difference]: With dead ends: 143 [2020-10-28 14:25:17,899 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:25:17,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:25:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:25:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-28 14:25:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 14:25:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-10-28 14:25:17,911 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 125 [2020-10-28 14:25:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:17,911 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-10-28 14:25:17,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:25:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-10-28 14:25:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 14:25:17,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:17,912 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:17,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:25:17,913 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1318881415, now seen corresponding path program 16 times [2020-10-28 14:25:17,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:17,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541339988] [2020-10-28 14:25:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:17,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:19,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-28 14:25:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:19,693 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:19,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:19,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:19,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:19,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:19,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:19,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:25:19,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:19,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:19,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:19,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:19,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:19,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:19,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541339988] [2020-10-28 14:25:19,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:19,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:25:19,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508526143] [2020-10-28 14:25:19,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:25:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:25:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:25:19,739 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 29 states. [2020-10-28 14:25:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:20,053 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2020-10-28 14:25:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:25:20,054 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-28 14:25:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:20,055 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:25:20,056 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 14:25:20,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:25:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 14:25:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-28 14:25:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 14:25:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-28 14:25:20,063 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 130 [2020-10-28 14:25:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:20,064 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-28 14:25:20,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:25:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-28 14:25:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 14:25:20,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:20,066 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:20,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:25:20,066 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash -504996967, now seen corresponding path program 17 times [2020-10-28 14:25:20,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:20,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748367383] [2020-10-28 14:25:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:20,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:21,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:21,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 14:25:21,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:21,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1073 [2020-10-28 14:25:21,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:21,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:25:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 14:25:21,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:21,926 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:21,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:21,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:21,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:21,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:21,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:21,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:25:21,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:21,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:21,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:21,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:21,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:21,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:21,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748367383] [2020-10-28 14:25:21,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:21,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:25:21,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883976801] [2020-10-28 14:25:21,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:25:21,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:25:21,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:25:21,996 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 30 states. [2020-10-28 14:25:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:22,324 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-28 14:25:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:25:22,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2020-10-28 14:25:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:22,326 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:25:22,326 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 14:25:22,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:25:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 14:25:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-28 14:25:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:25:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-28 14:25:22,334 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 135 [2020-10-28 14:25:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:22,335 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-28 14:25:22,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:25:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-28 14:25:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 14:25:22,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:22,336 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:22,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:25:22,337 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash -97711239, now seen corresponding path program 18 times [2020-10-28 14:25:22,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:22,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877190119] [2020-10-28 14:25:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:23,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:23,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 14:25:23,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:23,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-10-28 14:25:23,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:23,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:23,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:25:23,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:23,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 14:25:23,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:24,398 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:24,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:24,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:24,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:24,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:24,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877190119] [2020-10-28 14:25:24,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:24,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:25:24,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159562676] [2020-10-28 14:25:24,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:25:24,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:24,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:25:24,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:25:24,447 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 31 states. [2020-10-28 14:25:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:24,781 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2020-10-28 14:25:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:25:24,781 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 140 [2020-10-28 14:25:24,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:24,783 INFO L225 Difference]: With dead ends: 158 [2020-10-28 14:25:24,783 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:25:24,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:25:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:25:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-28 14:25:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 14:25:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-28 14:25:24,793 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 140 [2020-10-28 14:25:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:24,793 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-28 14:25:24,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:25:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-28 14:25:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 14:25:24,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:24,795 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:24,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:25:24,795 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1006192537, now seen corresponding path program 19 times [2020-10-28 14:25:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:24,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270013863] [2020-10-28 14:25:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:24,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:26,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:26,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 14:25:26,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-28 14:25:26,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:26,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:26,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:25:26,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:26,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-28 14:25:26,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:26,835 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:26,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:26,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:26,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:26,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:26,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:25:26,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:26,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:26,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270013863] [2020-10-28 14:25:26,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:26,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:25:26,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787812046] [2020-10-28 14:25:26,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:25:26,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:26,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:25:26,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:25:26,893 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 32 states. [2020-10-28 14:25:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:27,225 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2020-10-28 14:25:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:25:27,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2020-10-28 14:25:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:27,229 INFO L225 Difference]: With dead ends: 163 [2020-10-28 14:25:27,230 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:25:27,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:25:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:25:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-28 14:25:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 14:25:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-28 14:25:27,238 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 145 [2020-10-28 14:25:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:27,238 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-28 14:25:27,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:25:27,238 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-28 14:25:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-28 14:25:27,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:27,240 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:27,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:25:27,240 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -754081927, now seen corresponding path program 20 times [2020-10-28 14:25:27,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:27,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004387413] [2020-10-28 14:25:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:27,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:28,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:28,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 14:25:28,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:29,444 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:29,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:29,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:29,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:29,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:29,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:29,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:25:29,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:29,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:29,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:29,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004387413] [2020-10-28 14:25:29,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:29,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:25:29,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343987204] [2020-10-28 14:25:29,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:25:29,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:25:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:25:29,488 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 33 states. [2020-10-28 14:25:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:29,828 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-10-28 14:25:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:25:29,829 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 150 [2020-10-28 14:25:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:29,831 INFO L225 Difference]: With dead ends: 168 [2020-10-28 14:25:29,831 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 14:25:29,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:25:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 14:25:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-28 14:25:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 14:25:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-28 14:25:29,839 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 150 [2020-10-28 14:25:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:29,840 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-28 14:25:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:25:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-28 14:25:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 14:25:29,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:29,841 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:29,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:25:29,841 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:29,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2085958553, now seen corresponding path program 21 times [2020-10-28 14:25:29,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:29,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45021758] [2020-10-28 14:25:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:31,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:31,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 14:25:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:32,119 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:32,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:32,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:32,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:32,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:32,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:25:32,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:32,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:32,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:32,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:32,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:32,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:32,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45021758] [2020-10-28 14:25:32,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:32,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:25:32,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606248543] [2020-10-28 14:25:32,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:25:32,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:25:32,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:25:32,165 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 34 states. [2020-10-28 14:25:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:32,496 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2020-10-28 14:25:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:25:32,497 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 155 [2020-10-28 14:25:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:32,499 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:25:32,499 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 14:25:32,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:25:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 14:25:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-28 14:25:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:25:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-28 14:25:32,506 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 155 [2020-10-28 14:25:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:32,506 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-28 14:25:32,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:25:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-28 14:25:32,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 14:25:32,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:32,508 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:32,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:25:32,508 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:32,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1262826361, now seen corresponding path program 22 times [2020-10-28 14:25:32,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:32,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373178828] [2020-10-28 14:25:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:32,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:25:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:33,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 14:25:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:34,889 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:34,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:34,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:34,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:34,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:34,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:34,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:25:34,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:34,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:34,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:34,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:34,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:34,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373178828] [2020-10-28 14:25:34,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:34,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:25:34,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388988789] [2020-10-28 14:25:34,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:25:34,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:34,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:25:34,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:25:34,956 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 35 states. [2020-10-28 14:25:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:35,301 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2020-10-28 14:25:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:25:35,302 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 160 [2020-10-28 14:25:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:35,304 INFO L225 Difference]: With dead ends: 178 [2020-10-28 14:25:35,304 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 14:25:35,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:25:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 14:25:35,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-28 14:25:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 14:25:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-28 14:25:35,312 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 160 [2020-10-28 14:25:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:35,313 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-28 14:25:35,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:25:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-28 14:25:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 14:25:35,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:35,314 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:35,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:25:35,314 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:35,315 INFO L82 PathProgramCache]: Analyzing trace with hash 465182617, now seen corresponding path program 23 times [2020-10-28 14:25:35,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:35,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466727349] [2020-10-28 14:25:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:35,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1478 [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:25:36,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 14:25:36,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:37,781 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:37,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:37,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:37,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:37,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:37,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:37,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:25:37,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:37,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:37,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:37,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:37,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:37,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:37,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466727349] [2020-10-28 14:25:37,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:37,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:25:37,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17060005] [2020-10-28 14:25:37,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:25:37,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:25:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:25:37,832 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 36 states. [2020-10-28 14:25:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:38,197 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-10-28 14:25:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:25:38,197 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 165 [2020-10-28 14:25:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:38,199 INFO L225 Difference]: With dead ends: 183 [2020-10-28 14:25:38,200 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:25:38,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:25:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:25:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-10-28 14:25:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 14:25:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-28 14:25:38,208 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 165 [2020-10-28 14:25:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:38,208 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-28 14:25:38,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:25:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-28 14:25:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 14:25:38,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:38,209 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:38,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:25:38,209 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:38,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1645463417, now seen corresponding path program 24 times [2020-10-28 14:25:38,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:38,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976207994] [2020-10-28 14:25:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:38,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:39,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1552 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 14:25:39,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:40,781 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:40,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:40,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:40,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:40,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:40,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:40,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:25:40,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:40,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:40,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:40,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:40,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976207994] [2020-10-28 14:25:40,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:40,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:25:40,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093137315] [2020-10-28 14:25:40,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:25:40,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:40,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:25:40,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:25:40,830 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 37 states. [2020-10-28 14:25:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:41,207 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-10-28 14:25:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:25:41,208 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 170 [2020-10-28 14:25:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:41,210 INFO L225 Difference]: With dead ends: 188 [2020-10-28 14:25:41,210 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 14:25:41,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:25:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 14:25:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-28 14:25:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 14:25:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-28 14:25:41,218 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 170 [2020-10-28 14:25:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:41,219 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-28 14:25:41,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:25:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-28 14:25:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-28 14:25:41,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:41,220 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:41,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:25:41,221 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1561850983, now seen corresponding path program 25 times [2020-10-28 14:25:41,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:41,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674375880] [2020-10-28 14:25:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:41,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:42,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:42,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-28 14:25:42,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-28 14:25:42,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:42,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:25:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-28 14:25:42,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:43,936 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:43,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:43,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:43,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:43,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:25:43,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:43,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:43,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674375880] [2020-10-28 14:25:43,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:43,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:25:43,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106537621] [2020-10-28 14:25:43,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:25:43,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:25:43,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:25:43,989 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 38 states. [2020-10-28 14:25:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:44,373 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2020-10-28 14:25:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:25:44,374 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 175 [2020-10-28 14:25:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:44,376 INFO L225 Difference]: With dead ends: 193 [2020-10-28 14:25:44,377 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 14:25:44,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:25:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 14:25:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-28 14:25:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 14:25:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-10-28 14:25:44,386 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 175 [2020-10-28 14:25:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:44,386 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-10-28 14:25:44,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:25:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-10-28 14:25:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-28 14:25:44,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:44,388 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:44,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:25:44,388 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash 112810873, now seen corresponding path program 26 times [2020-10-28 14:25:44,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:44,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893026178] [2020-10-28 14:25:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:44,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:46,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2067 [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 14:25:46,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:47,611 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:47,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:47,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:47,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:47,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893026178] [2020-10-28 14:25:47,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:47,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:25:47,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128809147] [2020-10-28 14:25:47,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:25:47,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:25:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:25:47,661 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 39 states. [2020-10-28 14:25:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:48,041 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-10-28 14:25:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:25:48,041 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 180 [2020-10-28 14:25:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:48,043 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:25:48,043 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 14:25:48,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:25:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 14:25:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-28 14:25:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 14:25:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-28 14:25:48,052 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 180 [2020-10-28 14:25:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:48,053 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-28 14:25:48,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:25:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-28 14:25:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-28 14:25:48,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:48,054 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:48,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:25:48,055 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:48,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1432422503, now seen corresponding path program 27 times [2020-10-28 14:25:48,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:48,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924423837] [2020-10-28 14:25:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:48,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:49,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:49,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-28 14:25:49,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:49,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1749 [2020-10-28 14:25:49,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:49,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:25:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-28 14:25:49,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:50,939 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:50,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:50,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:50,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924423837] [2020-10-28 14:25:50,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:50,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:25:50,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954927120] [2020-10-28 14:25:50,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:25:50,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:25:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:25:51,008 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-10-28 14:25:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:51,345 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2020-10-28 14:25:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:25:51,346 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 185 [2020-10-28 14:25:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:51,348 INFO L225 Difference]: With dead ends: 203 [2020-10-28 14:25:51,348 INFO L226 Difference]: Without dead ends: 195 [2020-10-28 14:25:51,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:25:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-28 14:25:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-10-28 14:25:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 14:25:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2020-10-28 14:25:51,361 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 185 [2020-10-28 14:25:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:51,361 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2020-10-28 14:25:51,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:25:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2020-10-28 14:25:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-28 14:25:51,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:51,368 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:51,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:25:51,368 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 410382201, now seen corresponding path program 28 times [2020-10-28 14:25:51,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:51,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59341941] [2020-10-28 14:25:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:51,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:53,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-28 14:25:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:54,441 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:54,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:54,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:54,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:54,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:54,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:25:54,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:54,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:54,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:54,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:54,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59341941] [2020-10-28 14:25:54,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:54,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:25:54,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440937160] [2020-10-28 14:25:54,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:25:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:25:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:25:54,499 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 41 states. [2020-10-28 14:25:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:54,852 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2020-10-28 14:25:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:25:54,853 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 190 [2020-10-28 14:25:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:54,855 INFO L225 Difference]: With dead ends: 208 [2020-10-28 14:25:54,855 INFO L226 Difference]: Without dead ends: 200 [2020-10-28 14:25:54,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:25:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-28 14:25:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-10-28 14:25:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 14:25:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-10-28 14:25:54,864 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 190 [2020-10-28 14:25:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:54,865 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-10-28 14:25:54,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:25:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-10-28 14:25:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-28 14:25:54,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:54,866 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:54,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:25:54,866 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash -610344039, now seen corresponding path program 29 times [2020-10-28 14:25:54,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:54,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561177612] [2020-10-28 14:25:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:54,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:56,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:56,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 14:25:56,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1952 [2020-10-28 14:25:56,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:56,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:25:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-28 14:25:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:58,089 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:25:58,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:58,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:58,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:58,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:58,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:58,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:25:58,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:58,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:58,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:58,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:58,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:58,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561177612] [2020-10-28 14:25:58,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:58,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:25:58,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225908017] [2020-10-28 14:25:58,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:25:58,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:58,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:25:58,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:25:58,198 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 42 states. [2020-10-28 14:25:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:58,594 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2020-10-28 14:25:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:25:58,595 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2020-10-28 14:25:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:58,597 INFO L225 Difference]: With dead ends: 213 [2020-10-28 14:25:58,597 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 14:25:58,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:25:58,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 14:25:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-10-28 14:25:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-28 14:25:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-10-28 14:25:58,609 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 195 [2020-10-28 14:25:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:58,609 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-10-28 14:25:58,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:25:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-10-28 14:25:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-28 14:25:58,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:58,611 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:58,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:25:58,611 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:58,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1720288121, now seen corresponding path program 30 times [2020-10-28 14:25:58,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:58,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886903953] [2020-10-28 14:25:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:58,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:00,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:00,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-28 14:26:00,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2029 [2020-10-28 14:26:00,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:00,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:26:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-28 14:26:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:01,936 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:01,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:01,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:01,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:01,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:01,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886903953] [2020-10-28 14:26:01,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:01,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:26:01,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936511319] [2020-10-28 14:26:01,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:26:01,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:01,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:26:01,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:26:01,996 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 43 states. [2020-10-28 14:26:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:02,444 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2020-10-28 14:26:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:26:02,445 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 200 [2020-10-28 14:26:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:02,446 INFO L225 Difference]: With dead ends: 218 [2020-10-28 14:26:02,447 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 14:26:02,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:26:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 14:26:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-28 14:26:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 14:26:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-10-28 14:26:02,460 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 200 [2020-10-28 14:26:02,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:02,461 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-10-28 14:26:02,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:26:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-10-28 14:26:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-28 14:26:02,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:02,463 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:02,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:26:02,463 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash -290992231, now seen corresponding path program 31 times [2020-10-28 14:26:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:02,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479303024] [2020-10-28 14:26:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:02,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:04,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:04,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-28 14:26:04,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2263 [2020-10-28 14:26:04,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:04,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 14:26:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-28 14:26:04,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:06,078 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:06,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:06,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:06,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:06,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:06,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:26:06,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:06,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:06,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:06,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479303024] [2020-10-28 14:26:06,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:06,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 14:26:06,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948296003] [2020-10-28 14:26:06,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 14:26:06,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:06,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 14:26:06,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:26:06,137 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 44 states. [2020-10-28 14:26:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:06,529 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2020-10-28 14:26:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 14:26:06,530 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 205 [2020-10-28 14:26:06,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:06,532 INFO L225 Difference]: With dead ends: 223 [2020-10-28 14:26:06,532 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 14:26:06,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:26:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 14:26:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-28 14:26:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 14:26:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2020-10-28 14:26:06,540 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 205 [2020-10-28 14:26:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:06,541 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2020-10-28 14:26:06,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 14:26:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2020-10-28 14:26:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-28 14:26:06,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:06,542 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:06,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:26:06,543 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1338763399, now seen corresponding path program 32 times [2020-10-28 14:26:06,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:06,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886944718] [2020-10-28 14:26:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:06,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2468 [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 14:26:09,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-28 14:26:09,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:10,410 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:10,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:10,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:10,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:10,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:10,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:10,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:26:10,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:10,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:10,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:10,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:10,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:10,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:10,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886944718] [2020-10-28 14:26:10,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:10,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 14:26:10,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569989416] [2020-10-28 14:26:10,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 14:26:10,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 14:26:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:26:10,473 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand 45 states. [2020-10-28 14:26:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:10,881 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-10-28 14:26:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 14:26:10,882 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 210 [2020-10-28 14:26:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:10,883 INFO L225 Difference]: With dead ends: 228 [2020-10-28 14:26:10,883 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 14:26:10,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:26:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 14:26:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-10-28 14:26:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 14:26:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-10-28 14:26:10,893 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 210 [2020-10-28 14:26:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:10,893 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-10-28 14:26:10,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 14:26:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-10-28 14:26:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-28 14:26:10,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:10,895 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:10,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:26:10,895 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:10,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1401308263, now seen corresponding path program 33 times [2020-10-28 14:26:10,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:10,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412905542] [2020-10-28 14:26:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:11,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:13,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2390 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-28 14:26:13,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:14,764 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:14,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:14,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:14,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:14,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:14,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:14,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:26:14,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:14,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:14,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:14,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412905542] [2020-10-28 14:26:14,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:14,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 14:26:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525638804] [2020-10-28 14:26:14,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 14:26:14,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 14:26:14,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:26:14,832 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 46 states. [2020-10-28 14:26:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:15,224 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2020-10-28 14:26:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 14:26:15,224 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 215 [2020-10-28 14:26:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:15,226 INFO L225 Difference]: With dead ends: 233 [2020-10-28 14:26:15,227 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 14:26:15,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:26:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 14:26:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-28 14:26:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 14:26:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-10-28 14:26:15,235 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 215 [2020-10-28 14:26:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:15,236 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-10-28 14:26:15,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 14:26:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-10-28 14:26:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 14:26:15,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:15,237 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:15,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:26:15,238 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:15,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1531597959, now seen corresponding path program 34 times [2020-10-28 14:26:15,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:15,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421851102] [2020-10-28 14:26:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:17,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:17,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-28 14:26:17,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:17,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2383 [2020-10-28 14:26:17,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:17,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 14:26:17,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:17,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 14:26:17,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:19,119 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:19,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:19,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:19,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:19,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:19,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:19,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421851102] [2020-10-28 14:26:19,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:19,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 14:26:19,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996834342] [2020-10-28 14:26:19,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 14:26:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 14:26:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:26:19,187 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 47 states. [2020-10-28 14:26:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:19,651 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2020-10-28 14:26:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 14:26:19,652 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 220 [2020-10-28 14:26:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:19,653 INFO L225 Difference]: With dead ends: 238 [2020-10-28 14:26:19,654 INFO L226 Difference]: Without dead ends: 230 [2020-10-28 14:26:19,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:26:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-28 14:26:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-28 14:26:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 14:26:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2020-10-28 14:26:19,662 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 220 [2020-10-28 14:26:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:19,663 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2020-10-28 14:26:19,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 14:26:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2020-10-28 14:26:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 14:26:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:19,664 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:19,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:26:19,665 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash -304830567, now seen corresponding path program 35 times [2020-10-28 14:26:19,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:19,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788196247] [2020-10-28 14:26:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:19,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:22,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:22,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 14:26:22,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:22,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2519 [2020-10-28 14:26:22,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:22,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 14:26:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-28 14:26:22,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:23,789 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:23,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:23,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:23,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:23,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:23,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788196247] [2020-10-28 14:26:23,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:23,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 14:26:23,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588166309] [2020-10-28 14:26:23,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 14:26:23,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 14:26:23,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:26:23,857 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 48 states. [2020-10-28 14:26:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:24,303 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2020-10-28 14:26:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 14:26:24,303 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 225 [2020-10-28 14:26:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:24,305 INFO L225 Difference]: With dead ends: 243 [2020-10-28 14:26:24,305 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 14:26:24,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:26:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 14:26:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-10-28 14:26:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 14:26:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2020-10-28 14:26:24,314 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 225 [2020-10-28 14:26:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:24,314 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2020-10-28 14:26:24,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 14:26:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2020-10-28 14:26:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-28 14:26:24,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:24,316 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:24,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:26:24,316 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash -481411207, now seen corresponding path program 36 times [2020-10-28 14:26:24,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:24,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491256937] [2020-10-28 14:26:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:24,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:27,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-10-28 14:26:27,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:28,713 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:28,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:28,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:28,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:28,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:28,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491256937] [2020-10-28 14:26:28,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:28,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 14:26:28,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377630414] [2020-10-28 14:26:28,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 14:26:28,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 14:26:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:26:28,784 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 49 states. [2020-10-28 14:26:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:29,213 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2020-10-28 14:26:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 14:26:29,213 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 230 [2020-10-28 14:26:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:29,215 INFO L225 Difference]: With dead ends: 248 [2020-10-28 14:26:29,215 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 14:26:29,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:26:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 14:26:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-10-28 14:26:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-28 14:26:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2020-10-28 14:26:29,225 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 230 [2020-10-28 14:26:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:29,225 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2020-10-28 14:26:29,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 14:26:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2020-10-28 14:26:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-28 14:26:29,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:29,227 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:29,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:26:29,227 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1686596711, now seen corresponding path program 37 times [2020-10-28 14:26:29,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:29,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48833361] [2020-10-28 14:26:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:29,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:32,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:32,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-28 14:26:32,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:32,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2818 [2020-10-28 14:26:32,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:32,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 14:26:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-28 14:26:32,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:33,723 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:33,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:33,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:33,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:33,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:33,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:26:33,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:33,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:33,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:33,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:33,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48833361] [2020-10-28 14:26:33,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:33,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 14:26:33,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652319615] [2020-10-28 14:26:33,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 14:26:33,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 14:26:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:26:33,795 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 50 states. [2020-10-28 14:26:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:34,196 INFO L93 Difference]: Finished difference Result 253 states and 255 transitions. [2020-10-28 14:26:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 14:26:34,197 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 235 [2020-10-28 14:26:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:34,199 INFO L225 Difference]: With dead ends: 253 [2020-10-28 14:26:34,199 INFO L226 Difference]: Without dead ends: 245 [2020-10-28 14:26:34,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:26:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-28 14:26:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-10-28 14:26:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 14:26:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2020-10-28 14:26:34,208 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 235 [2020-10-28 14:26:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:34,208 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2020-10-28 14:26:34,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 14:26:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2020-10-28 14:26:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-28 14:26:34,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:34,210 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:34,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:26:34,211 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash -79834247, now seen corresponding path program 38 times [2020-10-28 14:26:34,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:34,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195671658] [2020-10-28 14:26:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:34,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:37,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:37,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-28 14:26:37,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:37,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2826 [2020-10-28 14:26:37,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:37,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 14:26:37,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:37,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 229 [2020-10-28 14:26:37,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:38,810 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:38,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:38,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:38,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:38,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:38,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195671658] [2020-10-28 14:26:38,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:38,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 14:26:38,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410726539] [2020-10-28 14:26:38,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 14:26:38,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:38,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 14:26:38,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:26:38,885 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand 51 states. [2020-10-28 14:26:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:39,377 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-10-28 14:26:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 14:26:39,378 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 240 [2020-10-28 14:26:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:39,382 INFO L225 Difference]: With dead ends: 258 [2020-10-28 14:26:39,382 INFO L226 Difference]: Without dead ends: 250 [2020-10-28 14:26:39,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:26:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-28 14:26:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-10-28 14:26:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 14:26:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2020-10-28 14:26:39,390 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 240 [2020-10-28 14:26:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:39,390 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2020-10-28 14:26:39,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 14:26:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2020-10-28 14:26:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 14:26:39,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:39,392 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:39,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:26:39,393 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1373274215, now seen corresponding path program 39 times [2020-10-28 14:26:39,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:39,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927260027] [2020-10-28 14:26:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:39,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:42,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3006 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-28 14:26:42,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:44,211 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:44,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:44,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:44,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:44,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:44,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:44,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:26:44,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:44,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:44,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:44,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:44,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:44,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:44,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927260027] [2020-10-28 14:26:44,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:44,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 14:26:44,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156657872] [2020-10-28 14:26:44,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 14:26:44,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:44,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 14:26:44,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:26:44,287 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 52 states. [2020-10-28 14:26:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:44,738 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2020-10-28 14:26:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 14:26:44,738 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 245 [2020-10-28 14:26:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:44,740 INFO L225 Difference]: With dead ends: 263 [2020-10-28 14:26:44,741 INFO L226 Difference]: Without dead ends: 255 [2020-10-28 14:26:44,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:26:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-28 14:26:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-10-28 14:26:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-28 14:26:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2020-10-28 14:26:44,748 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 245 [2020-10-28 14:26:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:44,748 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2020-10-28 14:26:44,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 14:26:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2020-10-28 14:26:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-28 14:26:44,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:44,750 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:44,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:26:44,750 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1808033657, now seen corresponding path program 40 times [2020-10-28 14:26:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:44,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19430738] [2020-10-28 14:26:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:44,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:47,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:47,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-28 14:26:47,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:47,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3119 [2020-10-28 14:26:47,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:47,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 14:26:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 239 [2020-10-28 14:26:47,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:49,739 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:49,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:49,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:49,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:49,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:49,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:49,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:26:49,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:49,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:49,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19430738] [2020-10-28 14:26:49,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:49,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 14:26:49,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729928479] [2020-10-28 14:26:49,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 14:26:49,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 14:26:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:26:49,819 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 53 states. [2020-10-28 14:26:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:50,282 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2020-10-28 14:26:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 14:26:50,283 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 250 [2020-10-28 14:26:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:50,285 INFO L225 Difference]: With dead ends: 268 [2020-10-28 14:26:50,285 INFO L226 Difference]: Without dead ends: 260 [2020-10-28 14:26:50,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:26:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-28 14:26:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-10-28 14:26:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-28 14:26:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2020-10-28 14:26:50,294 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 250 [2020-10-28 14:26:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:50,295 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2020-10-28 14:26:50,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 14:26:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2020-10-28 14:26:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 14:26:50,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:50,297 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:50,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:26:50,297 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash 781937561, now seen corresponding path program 41 times [2020-10-28 14:26:50,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:50,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278388897] [2020-10-28 14:26:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:50,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:53,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3285 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 244 [2020-10-28 14:26:53,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:55,547 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:26:55,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:55,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:55,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278388897] [2020-10-28 14:26:55,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:55,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 14:26:55,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023133917] [2020-10-28 14:26:55,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 14:26:55,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 14:26:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 14:26:55,663 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 54 states. [2020-10-28 14:26:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:56,161 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2020-10-28 14:26:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 14:26:56,162 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 255 [2020-10-28 14:26:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:56,163 INFO L225 Difference]: With dead ends: 273 [2020-10-28 14:26:56,163 INFO L226 Difference]: Without dead ends: 265 [2020-10-28 14:26:56,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 14:26:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-28 14:26:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-10-28 14:26:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-28 14:26:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2020-10-28 14:26:56,172 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 255 [2020-10-28 14:26:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:56,173 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2020-10-28 14:26:56,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 14:26:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2020-10-28 14:26:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-28 14:26:56,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:56,175 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:56,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:26:56,175 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1541276807, now seen corresponding path program 42 times [2020-10-28 14:26:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:56,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473519409] [2020-10-28 14:26:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:56,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:59,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:59,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-28 14:26:59,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:59,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3380 [2020-10-28 14:26:59,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:59,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:59,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 14:26:59,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:59,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-28 14:26:59,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:01,554 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:01,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:01,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:01,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:01,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:01,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:01,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:27:01,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:01,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:01,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:01,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:01,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:01,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:01,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473519409] [2020-10-28 14:27:01,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:01,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-28 14:27:01,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784896070] [2020-10-28 14:27:01,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-28 14:27:01,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:01,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-28 14:27:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:27:01,637 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 55 states. [2020-10-28 14:27:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:02,143 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2020-10-28 14:27:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 14:27:02,144 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 260 [2020-10-28 14:27:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:02,146 INFO L225 Difference]: With dead ends: 278 [2020-10-28 14:27:02,146 INFO L226 Difference]: Without dead ends: 270 [2020-10-28 14:27:02,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:27:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-28 14:27:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-10-28 14:27:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-28 14:27:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2020-10-28 14:27:02,155 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 260 [2020-10-28 14:27:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:02,155 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2020-10-28 14:27:02,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-28 14:27:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2020-10-28 14:27:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 14:27:02,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:02,157 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:02,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:27:02,158 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash 899307417, now seen corresponding path program 43 times [2020-10-28 14:27:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:02,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772086167] [2020-10-28 14:27:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:02,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:05,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:05,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-28 14:27:05,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:05,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3473 [2020-10-28 14:27:05,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:05,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-28 14:27:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-28 14:27:05,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:07,687 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:07,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:07,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:07,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772086167] [2020-10-28 14:27:07,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:07,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-28 14:27:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913895806] [2020-10-28 14:27:07,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-28 14:27:07,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:07,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-28 14:27:07,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 14:27:07,770 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 56 states. [2020-10-28 14:27:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:08,290 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2020-10-28 14:27:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 14:27:08,291 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 265 [2020-10-28 14:27:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:08,293 INFO L225 Difference]: With dead ends: 283 [2020-10-28 14:27:08,293 INFO L226 Difference]: Without dead ends: 275 [2020-10-28 14:27:08,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 14:27:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-28 14:27:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-10-28 14:27:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-28 14:27:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 273 transitions. [2020-10-28 14:27:08,303 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 273 transitions. Word has length 265 [2020-10-28 14:27:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:08,304 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 273 transitions. [2020-10-28 14:27:08,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-28 14:27:08,304 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 273 transitions. [2020-10-28 14:27:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-28 14:27:08,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:08,306 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:08,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:27:08,306 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash 60198777, now seen corresponding path program 44 times [2020-10-28 14:27:08,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:08,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878337988] [2020-10-28 14:27:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:08,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:11,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:11,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-28 14:27:11,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:11,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3521 [2020-10-28 14:27:11,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:11,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:11,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 14:27:11,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:11,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 259 [2020-10-28 14:27:11,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:13,998 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:13,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:14,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:14,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:14,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:14,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:27:14,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:14,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:14,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878337988] [2020-10-28 14:27:14,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:14,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 14:27:14,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384288774] [2020-10-28 14:27:14,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 14:27:14,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 14:27:14,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:27:14,084 INFO L87 Difference]: Start difference. First operand 272 states and 273 transitions. Second operand 57 states. [2020-10-28 14:27:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:14,559 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2020-10-28 14:27:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 14:27:14,559 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 270 [2020-10-28 14:27:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:14,561 INFO L225 Difference]: With dead ends: 288 [2020-10-28 14:27:14,561 INFO L226 Difference]: Without dead ends: 280 [2020-10-28 14:27:14,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:27:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-28 14:27:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-10-28 14:27:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-28 14:27:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-10-28 14:27:14,570 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 270 [2020-10-28 14:27:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:14,570 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-10-28 14:27:14,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 14:27:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-10-28 14:27:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-28 14:27:14,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:14,572 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:14,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:27:14,573 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -337493095, now seen corresponding path program 45 times [2020-10-28 14:27:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:14,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826614999] [2020-10-28 14:27:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:18,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:18,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-28 14:27:18,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:18,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3718 [2020-10-28 14:27:18,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:18,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-28 14:27:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 264 [2020-10-28 14:27:18,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:20,549 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:20,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:20,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:20,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:20,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:20,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:20,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:27:20,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:20,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:20,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:20,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:20,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:20,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:20,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826614999] [2020-10-28 14:27:20,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:20,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 14:27:20,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519660564] [2020-10-28 14:27:20,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 14:27:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 14:27:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 14:27:20,674 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 58 states. [2020-10-28 14:27:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:21,173 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2020-10-28 14:27:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-28 14:27:21,174 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 275 [2020-10-28 14:27:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:21,177 INFO L225 Difference]: With dead ends: 293 [2020-10-28 14:27:21,177 INFO L226 Difference]: Without dead ends: 285 [2020-10-28 14:27:21,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 14:27:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-28 14:27:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-10-28 14:27:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-28 14:27:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2020-10-28 14:27:21,186 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 275 [2020-10-28 14:27:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:21,186 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2020-10-28 14:27:21,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 14:27:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2020-10-28 14:27:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-28 14:27:21,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:21,188 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:21,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:27:21,189 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash -647879815, now seen corresponding path program 46 times [2020-10-28 14:27:21,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:21,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490730032] [2020-10-28 14:27:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:21,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:25,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3861 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 14:27:25,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:27,315 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:27,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:27,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:27,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:27,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:27,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:27,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:27:27,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:27,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:27,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:27,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:27,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490730032] [2020-10-28 14:27:27,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:27,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-28 14:27:27,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085828700] [2020-10-28 14:27:27,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-28 14:27:27,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-28 14:27:27,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:27:27,403 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 59 states. [2020-10-28 14:27:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:27,926 INFO L93 Difference]: Finished difference Result 298 states and 300 transitions. [2020-10-28 14:27:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 14:27:27,927 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 280 [2020-10-28 14:27:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:27,929 INFO L225 Difference]: With dead ends: 298 [2020-10-28 14:27:27,929 INFO L226 Difference]: Without dead ends: 290 [2020-10-28 14:27:27,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:27:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-28 14:27:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-10-28 14:27:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-28 14:27:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2020-10-28 14:27:27,938 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 280 [2020-10-28 14:27:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:27,939 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2020-10-28 14:27:27,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-28 14:27:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2020-10-28 14:27:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-28 14:27:27,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:27,941 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:27,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:27:27,941 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:27,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1976356967, now seen corresponding path program 47 times [2020-10-28 14:27:27,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:27,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486393131] [2020-10-28 14:27:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:28,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:31,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:31,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-28 14:27:31,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:31,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3936 [2020-10-28 14:27:31,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:31,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-28 14:27:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 274 [2020-10-28 14:27:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:34,261 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:34,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:34,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:34,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:34,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:34,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:27:34,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:34,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:34,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:34,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:34,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:34,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486393131] [2020-10-28 14:27:34,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:34,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-28 14:27:34,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406029561] [2020-10-28 14:27:34,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-28 14:27:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-28 14:27:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 14:27:34,353 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 60 states. [2020-10-28 14:27:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:34,801 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2020-10-28 14:27:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 14:27:34,801 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 285 [2020-10-28 14:27:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:34,803 INFO L225 Difference]: With dead ends: 303 [2020-10-28 14:27:34,803 INFO L226 Difference]: Without dead ends: 295 [2020-10-28 14:27:34,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 14:27:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-28 14:27:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-10-28 14:27:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-28 14:27:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2020-10-28 14:27:34,812 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 285 [2020-10-28 14:27:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:34,813 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2020-10-28 14:27:34,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-28 14:27:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2020-10-28 14:27:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-28 14:27:34,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:34,815 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:34,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:27:34,815 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1690613625, now seen corresponding path program 48 times [2020-10-28 14:27:34,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:34,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663762357] [2020-10-28 14:27:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:34,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:39,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4237 [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-28 14:27:39,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:41,463 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:41,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:41,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:41,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:41,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:41,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:27:41,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:41,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:41,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:41,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663762357] [2020-10-28 14:27:41,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:41,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-28 14:27:41,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433116209] [2020-10-28 14:27:41,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-28 14:27:41,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:41,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-28 14:27:41,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:27:41,576 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 61 states. [2020-10-28 14:27:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:42,152 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2020-10-28 14:27:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-28 14:27:42,153 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 290 [2020-10-28 14:27:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:42,155 INFO L225 Difference]: With dead ends: 308 [2020-10-28 14:27:42,155 INFO L226 Difference]: Without dead ends: 300 [2020-10-28 14:27:42,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:27:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-28 14:27:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-10-28 14:27:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-28 14:27:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2020-10-28 14:27:42,163 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 290 [2020-10-28 14:27:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:42,164 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2020-10-28 14:27:42,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-28 14:27:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2020-10-28 14:27:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-28 14:27:42,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:42,166 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:42,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:27:42,166 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:42,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1498225561, now seen corresponding path program 49 times [2020-10-28 14:27:42,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:42,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469286229] [2020-10-28 14:27:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:42,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:46,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:46,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-28 14:27:46,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:46,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4413 [2020-10-28 14:27:46,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:46,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-28 14:27:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 284 [2020-10-28 14:27:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:49,250 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:49,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:49,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:49,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:49,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:49,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:27:49,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:49,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:49,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:49,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469286229] [2020-10-28 14:27:49,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:49,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-28 14:27:49,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272583441] [2020-10-28 14:27:49,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-28 14:27:49,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:49,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-28 14:27:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 14:27:49,345 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand 62 states. [2020-10-28 14:27:49,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:49,907 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2020-10-28 14:27:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 14:27:49,908 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 295 [2020-10-28 14:27:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:49,910 INFO L225 Difference]: With dead ends: 313 [2020-10-28 14:27:49,910 INFO L226 Difference]: Without dead ends: 305 [2020-10-28 14:27:49,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 14:27:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-28 14:27:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-10-28 14:27:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-28 14:27:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 303 transitions. [2020-10-28 14:27:49,920 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 303 transitions. Word has length 295 [2020-10-28 14:27:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:49,921 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 303 transitions. [2020-10-28 14:27:49,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-28 14:27:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 303 transitions. [2020-10-28 14:27:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-28 14:27:49,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:49,923 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:49,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:27:49,923 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash -721532039, now seen corresponding path program 50 times [2020-10-28 14:27:49,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:49,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303746028] [2020-10-28 14:27:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:50,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:54,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:54,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-28 14:27:54,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:54,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4361 [2020-10-28 14:27:54,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:54,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:54,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-28 14:27:54,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:54,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 289 [2020-10-28 14:27:54,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:56,904 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:27:56,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:56,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:56,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:56,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:56,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:56,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:27:56,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:56,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:56,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:56,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:57,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303746028] [2020-10-28 14:27:57,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:57,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-28 14:27:57,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467446005] [2020-10-28 14:27:57,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-28 14:27:57,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-28 14:27:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:27:57,007 INFO L87 Difference]: Start difference. First operand 302 states and 303 transitions. Second operand 63 states. [2020-10-28 14:27:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:57,595 INFO L93 Difference]: Finished difference Result 318 states and 320 transitions. [2020-10-28 14:27:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-28 14:27:57,596 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 300 [2020-10-28 14:27:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:57,598 INFO L225 Difference]: With dead ends: 318 [2020-10-28 14:27:57,598 INFO L226 Difference]: Without dead ends: 310 [2020-10-28 14:27:57,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:27:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-28 14:27:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-10-28 14:27:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-28 14:27:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-10-28 14:27:57,607 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 300 [2020-10-28 14:27:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:57,607 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-10-28 14:27:57,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-28 14:27:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-10-28 14:27:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 14:27:57,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:57,609 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:57,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:27:57,610 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1309669479, now seen corresponding path program 51 times [2020-10-28 14:27:57,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:57,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585204734] [2020-10-28 14:27:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:02,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:02,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 14:28:02,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:02,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4763 [2020-10-28 14:28:02,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:02,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:02,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-28 14:28:02,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:28:02,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 294 [2020-10-28 14:28:02,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:05,183 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:28:05,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:28:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:05,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:05,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:05,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:28:05,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:05,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:28:05,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:05,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:28:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:28:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:28:05,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:28:05,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585204734] [2020-10-28 14:28:05,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:28:05,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-28 14:28:05,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044775641] [2020-10-28 14:28:05,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-28 14:28:05,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:28:05,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-28 14:28:05,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 14:28:05,300 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 64 states. [2020-10-28 14:28:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:28:05,844 INFO L93 Difference]: Finished difference Result 323 states and 325 transitions. [2020-10-28 14:28:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-28 14:28:05,844 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 305 [2020-10-28 14:28:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:28:05,847 INFO L225 Difference]: With dead ends: 323 [2020-10-28 14:28:05,847 INFO L226 Difference]: Without dead ends: 315 [2020-10-28 14:28:05,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 14:28:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-28 14:28:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-10-28 14:28:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-28 14:28:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 313 transitions. [2020-10-28 14:28:05,856 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 313 transitions. Word has length 305 [2020-10-28 14:28:05,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:28:05,856 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 313 transitions. [2020-10-28 14:28:05,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-28 14:28:05,856 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 313 transitions. [2020-10-28 14:28:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-28 14:28:05,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:28:05,858 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:28:05,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:28:05,858 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:28:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:28:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1229905785, now seen corresponding path program 52 times [2020-10-28 14:28:05,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:28:05,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187828761] [2020-10-28 14:28:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:28:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:06,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:10,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4728 [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:28:10,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 299 [2020-10-28 14:28:10,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:13,595 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:28:13,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:28:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:13,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:13,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:13,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:28:13,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:13,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:28:13,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:13,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:28:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:28:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:28:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:28:13,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187828761] [2020-10-28 14:28:13,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:28:13,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-28 14:28:13,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31551537] [2020-10-28 14:28:13,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-28 14:28:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:28:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-28 14:28:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:28:13,699 INFO L87 Difference]: Start difference. First operand 312 states and 313 transitions. Second operand 65 states. [2020-10-28 14:28:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:28:14,288 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2020-10-28 14:28:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-28 14:28:14,289 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 310 [2020-10-28 14:28:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:28:14,291 INFO L225 Difference]: With dead ends: 328 [2020-10-28 14:28:14,291 INFO L226 Difference]: Without dead ends: 320 [2020-10-28 14:28:14,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:28:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-28 14:28:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-10-28 14:28:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-28 14:28:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2020-10-28 14:28:14,299 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 310 [2020-10-28 14:28:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:28:14,300 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2020-10-28 14:28:14,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-28 14:28:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2020-10-28 14:28:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 14:28:14,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:28:14,302 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:28:14,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:28:14,302 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:28:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:28:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash -52694119, now seen corresponding path program 53 times [2020-10-28 14:28:14,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:28:14,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787572633] [2020-10-28 14:28:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:28:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:14,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4968 [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-28 14:28:19,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:28:19,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 304 [2020-10-28 14:28:19,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:22,321 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:28:22,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:28:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:22,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:22,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:22,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:28:22,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:28:22,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:28:22,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:28:22,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787572633] [2020-10-28 14:28:22,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:28:22,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-28 14:28:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890124277] [2020-10-28 14:28:22,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-28 14:28:22,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:28:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-28 14:28:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 14:28:22,427 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand 66 states. [2020-10-28 14:28:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:28:23,064 INFO L93 Difference]: Finished difference Result 333 states and 335 transitions. [2020-10-28 14:28:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-28 14:28:23,065 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 315 [2020-10-28 14:28:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:28:23,067 INFO L225 Difference]: With dead ends: 333 [2020-10-28 14:28:23,067 INFO L226 Difference]: Without dead ends: 325 [2020-10-28 14:28:23,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 14:28:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-28 14:28:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-10-28 14:28:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-28 14:28:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-10-28 14:28:23,075 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 315 [2020-10-28 14:28:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:28:23,076 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-10-28 14:28:23,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-28 14:28:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-10-28 14:28:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-28 14:28:23,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:28:23,078 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:28:23,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:28:23,078 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:28:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:28:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash -789154951, now seen corresponding path program 54 times [2020-10-28 14:28:23,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:28:23,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558999837] [2020-10-28 14:28:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:28:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:23,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:28,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:28,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-28 14:28:28,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:28:28,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:28,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-28 14:28:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:28:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 309 [2020-10-28 14:28:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:31,243 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:28:31,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:28:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:31,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:31,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:28:31,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:28:31,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:31,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:28:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:28:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:28:31,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:28:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:28:31,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558999837] [2020-10-28 14:28:31,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:28:31,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-28 14:28:31,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718790071] [2020-10-28 14:28:31,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-28 14:28:31,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:28:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-28 14:28:31,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:28:31,379 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 67 states. [2020-10-28 14:28:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:28:32,004 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2020-10-28 14:28:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-28 14:28:32,005 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 320 [2020-10-28 14:28:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:28:32,007 INFO L225 Difference]: With dead ends: 338 [2020-10-28 14:28:32,007 INFO L226 Difference]: Without dead ends: 330 [2020-10-28 14:28:32,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:28:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-28 14:28:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2020-10-28 14:28:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-28 14:28:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2020-10-28 14:28:32,014 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 320 [2020-10-28 14:28:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:28:32,014 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2020-10-28 14:28:32,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-28 14:28:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2020-10-28 14:28:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 14:28:32,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:28:32,016 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:28:32,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:28:32,016 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:28:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:28:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1294934119, now seen corresponding path program 55 times [2020-10-28 14:28:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:28:32,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824041427] [2020-10-28 14:28:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:28:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:28:32,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:28:37,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:28:37,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 14:28:37,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:28:37,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:28:37,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:28:37,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:28:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-28 14:28:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:28:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-28 14:28:37,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0