/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/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:31,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:31,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:31,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:31,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:31,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:31,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:31,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:31,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:31,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:31,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:31,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:31,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:31,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:31,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:31,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:31,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:31,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:31,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:31,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:32,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:32,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:32,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:32,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:32,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:32,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:32,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:32,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:32,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:32,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:32,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:32,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:32,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:32,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:32,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:32,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:32,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:32,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:32,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:32,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:32,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:32,041 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 14:53:32,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:32,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:32,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:32,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:32,076 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:32,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:32,076 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:32,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:32,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:32,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:32,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:32,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:32,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:32,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:32,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:32,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:32,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:32,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:32,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:32,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:32,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:32,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:32,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:32,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:32,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:32,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:32,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:32,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:32,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:32,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:32,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:32,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:32,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:32,546 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:32,547 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:32,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2020-10-28 14:53:32,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac18b9489/08bc59e5798f4c0ab0d527c0bd77ac5c/FLAG88ea34b72 [2020-10-28 14:53:33,168 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:53:33,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2020-10-28 14:53:33,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac18b9489/08bc59e5798f4c0ab0d527c0bd77ac5c/FLAG88ea34b72 [2020-10-28 14:53:33,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac18b9489/08bc59e5798f4c0ab0d527c0bd77ac5c [2020-10-28 14:53:33,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:53:33,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:53:33,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:33,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:53:33,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:53:33,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461d3cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33, skipping insertion in model container [2020-10-28 14:53:33,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:53:33,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:53:33,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:33,821 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:53:33,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:33,855 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:53:33,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33 WrapperNode [2020-10-28 14:53:33,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:33,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:53:33,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:53:33,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:53:33,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (1/1) ... [2020-10-28 14:53:33,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:53:33,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:53:33,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:53:33,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:53:33,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (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 14:53:34,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:53:34,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:53:34,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:53:34,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:53:34,021 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:53:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:53:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:53:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:53:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:53:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:53:34,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:53:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:53:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:53:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:53:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:53:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:53:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:53:34,296 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:53:34,296 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:53:34,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:34 BoogieIcfgContainer [2020-10-28 14:53:34,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:53:34,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:53:34,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:53:34,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:53:34,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:53:33" (1/3) ... [2020-10-28 14:53:34,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1802a33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:34, skipping insertion in model container [2020-10-28 14:53:34,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:33" (2/3) ... [2020-10-28 14:53:34,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1802a33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:34, skipping insertion in model container [2020-10-28 14:53:34,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:34" (3/3) ... [2020-10-28 14:53:34,312 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2020-10-28 14:53:34,330 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:53:34,339 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:53:34,373 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:53:34,447 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:53:34,448 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:53:34,448 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:53:34,448 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:53:34,448 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:53:34,448 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:53:34,448 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:53:34,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:53:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 14:53:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:53:34,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:34,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:34,506 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash 665310781, now seen corresponding path program 1 times [2020-10-28 14:53:34,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:34,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318047065] [2020-10-28 14:53:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:34,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:34,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:34,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:53:34,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:34,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-28 14:53:34,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:34,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:53:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:34,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:53:34,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:34,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:34,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:34,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:34,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:53:34,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:34,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:34,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:34,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:34,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:34,999 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 14:53:35,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318047065] [2020-10-28 14:53:35,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:35,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:53:35,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852600726] [2020-10-28 14:53:35,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:53:35,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:35,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:53:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:53:35,040 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 14:53:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:35,135 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-28 14:53:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:53:35,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 14:53:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:35,147 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:53:35,147 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:53:35,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:53:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:53:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:53:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:53:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 14:53:35,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-28 14:53:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:35,199 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 14:53:35,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:53:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 14:53:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:53:35,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:35,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:35,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:53:35,201 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash -364744009, now seen corresponding path program 1 times [2020-10-28 14:53:35,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:35,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138485947] [2020-10-28 14:53:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:35,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:35,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:35,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:53:35,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 14:53:35,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:35,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:53:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:35,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:35,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:35,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:35,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:35,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:35,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:53:35,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:35,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:35,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:53:35,479 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 14:53:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138485947] [2020-10-28 14:53:35,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:35,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:35,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087885237] [2020-10-28 14:53:35,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:35,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:35,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:35,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:35,491 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-28 14:53:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:35,540 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 14:53:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:35,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 14:53:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:35,542 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:53:35,542 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 14:53:35,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 14:53:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-28 14:53:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:53:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 14:53:35,551 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-28 14:53:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:35,552 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 14:53:35,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 14:53:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:53:35,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:35,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:35,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:53:35,554 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1375402741, now seen corresponding path program 1 times [2020-10-28 14:53:35,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:35,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075881497] [2020-10-28 14:53:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:35,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:35,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:53:35,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:35,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 14:53:35,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:35,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:35,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:53:35,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:35,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:53:35,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:35,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:35,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:35,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:35,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:35,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:35,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:53:35,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:35,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:35,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075881497] [2020-10-28 14:53:35,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:35,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:53:35,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493214960] [2020-10-28 14:53:35,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:53:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:35,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:53:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:35,874 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-28 14:53:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:35,938 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 14:53:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:53:35,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 14:53:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:35,939 INFO L225 Difference]: With dead ends: 26 [2020-10-28 14:53:35,939 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:53:35,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:53:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-28 14:53:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 14:53:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 14:53:35,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-28 14:53:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:35,947 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 14:53:35,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:53:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 14:53:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:53:35,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:35,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:35,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:53:35,949 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1380815949, now seen corresponding path program 2 times [2020-10-28 14:53:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:35,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460667014] [2020-10-28 14:53:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:35,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:53:36,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-28 14:53:36,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:53:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:36,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:36,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:36,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:36,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:36,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:36,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:36,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460667014] [2020-10-28 14:53:36,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:36,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:53:36,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458940822] [2020-10-28 14:53:36,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:53:36,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:53:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:53:36,139 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-28 14:53:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:36,199 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 14:53:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:53:36,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 14:53:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:36,201 INFO L225 Difference]: With dead ends: 28 [2020-10-28 14:53:36,201 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:53:36,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:53:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:53:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 14:53:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:53:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 14:53:36,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-28 14:53:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:36,209 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 14:53:36,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:53:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 14:53:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:53:36,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:36,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:36,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:53:36,210 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:36,211 INFO L82 PathProgramCache]: Analyzing trace with hash -112155407, now seen corresponding path program 3 times [2020-10-28 14:53:36,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:36,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205086757] [2020-10-28 14:53:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:36,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:36,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 14:53:36,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:53:36,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:36,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:36,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:36,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:53:36,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:36,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:36,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:36,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:36,479 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 14:53:36,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205086757] [2020-10-28 14:53:36,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:36,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:53:36,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815282149] [2020-10-28 14:53:36,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:53:36,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:53:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:53:36,493 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-10-28 14:53:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:36,557 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 14:53:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:53:36,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-28 14:53:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:36,559 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:53:36,559 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:53:36,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:53:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:53:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 14:53:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:53:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-28 14:53:36,565 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-28 14:53:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:36,566 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-28 14:53:36,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:53:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-28 14:53:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:36,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:36,567 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:36,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:53:36,568 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash -700086609, now seen corresponding path program 4 times [2020-10-28 14:53:36,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:36,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339771752] [2020-10-28 14:53:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:36,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:36,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 14:53:36,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:53:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:53:36,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:36,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:36,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:36,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:36,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:36,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339771752] [2020-10-28 14:53:36,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:36,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:53:36,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138871883] [2020-10-28 14:53:36,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:53:36,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:36,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:53:36,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:53:36,778 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-10-28 14:53:36,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:36,846 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 14:53:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:53:36,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 14:53:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:36,847 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:53:36,848 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:53:36,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:53:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:53:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 14:53:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:53:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-28 14:53:36,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-28 14:53:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:36,854 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-28 14:53:36,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:53:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-28 14:53:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:36,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:36,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:36,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:53:36,856 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1233711341, now seen corresponding path program 5 times [2020-10-28 14:53:36,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:36,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460626751] [2020-10-28 14:53:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:37,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:37,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:53:37,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:37,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 14:53:37,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:37,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:53:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:53:37,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:37,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:37,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:37,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:37,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:37,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:37,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:37,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:37,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:37,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:37,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:37,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460626751] [2020-10-28 14:53:37,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:37,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:53:37,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740024505] [2020-10-28 14:53:37,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:53:37,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:53:37,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:53:37,113 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-28 14:53:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:37,170 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 14:53:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:53:37,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-28 14:53:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:37,172 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:53:37,172 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:53:37,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:53:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:53:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 14:53:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:53:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-28 14:53:37,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-28 14:53:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:37,179 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-28 14:53:37,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:53:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-28 14:53:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:53:37,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:37,180 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:37,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:53:37,180 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -107297877, now seen corresponding path program 6 times [2020-10-28 14:53:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:37,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282750414] [2020-10-28 14:53:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:37,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:37,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:53:37,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 14:53:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:37,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:53:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:37,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:37,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:37,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:37,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:37,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:37,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:37,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:37,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282750414] [2020-10-28 14:53:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:37,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:53:37,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60673304] [2020-10-28 14:53:37,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:53:37,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:53:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:53:37,464 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-10-28 14:53:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:37,553 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 14:53:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:53:37,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-28 14:53:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:37,554 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:53:37,554 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:53:37,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:53:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:53:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 14:53:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:53:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 14:53:37,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-28 14:53:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:37,561 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 14:53:37,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:53:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 14:53:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:53:37,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:37,562 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:37,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:53:37,562 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:37,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:37,563 INFO L82 PathProgramCache]: Analyzing trace with hash -326967575, now seen corresponding path program 7 times [2020-10-28 14:53:37,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:37,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604439195] [2020-10-28 14:53:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:37,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:37,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:37,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:53:37,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:37,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-28 14:53:37,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:37,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:37,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:53:37,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:37,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:37,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:37,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:37,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:37,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:37,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:37,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:37,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:37,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:37,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:37,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:37,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:37,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:37,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:37,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604439195] [2020-10-28 14:53:37,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:37,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:53:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145310129] [2020-10-28 14:53:37,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:53:37,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:37,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:53:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:53:37,871 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-10-28 14:53:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:37,949 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-28 14:53:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:53:37,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 14:53:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:37,951 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:53:37,951 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:53:37,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:53:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:53:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 14:53:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:53:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-28 14:53:37,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-28 14:53:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:37,957 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-28 14:53:37,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:53:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-28 14:53:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:53:37,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:37,958 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:37,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:53:37,959 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:37,959 INFO L82 PathProgramCache]: Analyzing trace with hash -976149849, now seen corresponding path program 8 times [2020-10-28 14:53:37,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:37,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476134220] [2020-10-28 14:53:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:37,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:53:38,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:38,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 14:53:38,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:53:38,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:53:38,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:38,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:38,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:38,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:38,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:38,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:38,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:38,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476134220] [2020-10-28 14:53:38,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:38,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:53:38,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790104214] [2020-10-28 14:53:38,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:53:38,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:38,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:53:38,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:53:38,350 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 12 states. [2020-10-28 14:53:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:38,434 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-28 14:53:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:53:38,435 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-28 14:53:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:38,436 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:53:38,436 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:53:38,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:53:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:53:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 14:53:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:53:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-28 14:53:38,443 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-28 14:53:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:38,443 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-28 14:53:38,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:53:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-28 14:53:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:53:38,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:38,444 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:38,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:53:38,445 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2070057243, now seen corresponding path program 9 times [2020-10-28 14:53:38,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:38,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820791844] [2020-10-28 14:53:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:38,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:38,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:38,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-28 14:53:38,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:53:38,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:38,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:53:38,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:38,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:38,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:38,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:38,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:38,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:38,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820791844] [2020-10-28 14:53:38,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:38,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:53:38,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227889538] [2020-10-28 14:53:38,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:53:38,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:53:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:53:38,859 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-10-28 14:53:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:38,950 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-28 14:53:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:53:38,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 14:53:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:38,952 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:53:38,952 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:53:38,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:53:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:53:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 14:53:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:53:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-28 14:53:38,958 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-28 14:53:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:38,958 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-28 14:53:38,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:53:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-28 14:53:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:38,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:38,959 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:38,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:53:38,960 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:38,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1048075357, now seen corresponding path program 10 times [2020-10-28 14:53:38,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:38,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49145381] [2020-10-28 14:53:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:39,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:39,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:39,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:39,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-28 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:53:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:39,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:39,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:39,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:39,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:39,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:39,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:39,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:39,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49145381] [2020-10-28 14:53:39,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:39,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:53:39,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467067979] [2020-10-28 14:53:39,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:53:39,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:53:39,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:53:39,387 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 14 states. [2020-10-28 14:53:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:39,490 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-28 14:53:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:53:39,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-28 14:53:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:39,491 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:53:39,491 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:53:39,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:53:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:53:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 14:53:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:53:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-28 14:53:39,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-28 14:53:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:39,498 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-28 14:53:39,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:53:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-28 14:53:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:39,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:39,499 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:39,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:53:39,500 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:39,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1823973601, now seen corresponding path program 11 times [2020-10-28 14:53:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:39,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083301232] [2020-10-28 14:53:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:39,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:39,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:53:39,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:39,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-28 14:53:39,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:39,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:53:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:53:39,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:39,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:39,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:39,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:39,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:39,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:39,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:53:39,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:39,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:39,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:39,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083301232] [2020-10-28 14:53:39,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:39,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:53:39,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761166267] [2020-10-28 14:53:39,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:53:39,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:53:39,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:53:39,984 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-10-28 14:53:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:40,110 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-28 14:53:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:53:40,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-28 14:53:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:40,111 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:53:40,112 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:53:40,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:53:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:53:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 14:53:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:53:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-28 14:53:40,117 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-28 14:53:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:40,118 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-28 14:53:40,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:53:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-28 14:53:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:53:40,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:40,119 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:40,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:53:40,119 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:40,120 INFO L82 PathProgramCache]: Analyzing trace with hash 199050911, now seen corresponding path program 12 times [2020-10-28 14:53:40,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:40,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969867684] [2020-10-28 14:53:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:40,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:40,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:40,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:53:40,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-28 14:53:40,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:40,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:53:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:53:40,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:40,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:40,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:40,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:40,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:40,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:40,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:40,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:40,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:40,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969867684] [2020-10-28 14:53:40,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:40,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:53:40,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052813541] [2020-10-28 14:53:40,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:53:40,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:40,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:53:40,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:53:40,685 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 16 states. [2020-10-28 14:53:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:40,769 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-28 14:53:40,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:53:40,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-28 14:53:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:40,770 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:53:40,770 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:53:40,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:53:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:53:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 14:53:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:53:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-28 14:53:40,777 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-28 14:53:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:40,777 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-28 14:53:40,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:53:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-28 14:53:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:53:40,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:40,778 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:40,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:53:40,779 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2016441565, now seen corresponding path program 13 times [2020-10-28 14:53:40,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:40,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776439357] [2020-10-28 14:53:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:40,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:41,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:41,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:53:41,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:41,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-28 14:53:41,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:41,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:53:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:53:41,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:41,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:41,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:41,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:41,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:41,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:41,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:41,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:41,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776439357] [2020-10-28 14:53:41,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:41,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:53:41,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914973093] [2020-10-28 14:53:41,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:53:41,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:53:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:53:41,395 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-10-28 14:53:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:41,531 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-28 14:53:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:53:41,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-28 14:53:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:41,533 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:53:41,533 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:53:41,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:53:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:53:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 14:53:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:53:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-28 14:53:41,540 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-28 14:53:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:41,540 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-28 14:53:41,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:53:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-28 14:53:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:53:41,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:41,541 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:41,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:53:41,542 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash 477170587, now seen corresponding path program 14 times [2020-10-28 14:53:41,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:41,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875368403] [2020-10-28 14:53:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:41,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:41,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:41,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:53:41,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:41,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-28 14:53:41,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:41,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:53:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:53:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:42,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:42,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:42,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:42,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:42,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:42,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:42,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:42,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:42,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:42,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:42,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:42,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:42,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875368403] [2020-10-28 14:53:42,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:42,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:53:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938509988] [2020-10-28 14:53:42,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:53:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:53:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:53:42,205 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-10-28 14:53:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:42,292 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-28 14:53:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:53:42,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-28 14:53:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:42,294 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:53:42,294 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:53:42,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:53:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:53:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 14:53:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:53:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-28 14:53:42,300 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-28 14:53:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:42,300 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-28 14:53:42,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:53:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-28 14:53:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:53:42,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:42,302 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:42,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:53:42,302 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1293489447, now seen corresponding path program 15 times [2020-10-28 14:53:42,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:42,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552936653] [2020-10-28 14:53:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:42,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:42,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:53:42,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:42,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-28 14:53:42,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:42,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:53:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:53:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:42,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:42,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:42,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:42,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:42,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:42,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:42,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:42,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:42,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:42,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552936653] [2020-10-28 14:53:42,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:42,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:53:42,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954469376] [2020-10-28 14:53:42,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:53:42,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:53:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:53:42,987 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-10-28 14:53:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:43,134 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-28 14:53:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:53:43,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-28 14:53:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:43,135 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:53:43,135 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:53:43,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:53:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:53:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 14:53:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:53:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-28 14:53:43,141 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-28 14:53:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:43,141 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-28 14:53:43,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:53:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-28 14:53:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:53:43,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:43,142 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:43,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:53:43,143 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2090732905, now seen corresponding path program 16 times [2020-10-28 14:53:43,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:43,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006038357] [2020-10-28 14:53:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:43,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:43,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:53:43,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:43,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 14:53:43,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:43,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:53:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:53:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:43,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:43,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:43,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:43,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:43,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:43,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:43,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:43,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:43,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:43,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:43,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:43,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:43,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006038357] [2020-10-28 14:53:43,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:43,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:53:43,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278488782] [2020-10-28 14:53:43,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:53:43,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:53:43,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:53:43,881 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 20 states. [2020-10-28 14:53:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:44,018 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-28 14:53:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:53:44,018 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-28 14:53:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:44,019 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:53:44,019 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:53:44,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:53:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:53:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 14:53:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:53:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-28 14:53:44,025 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-28 14:53:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:44,026 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-28 14:53:44,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:53:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-28 14:53:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:53:44,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:44,027 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:44,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:53:44,027 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash 557449941, now seen corresponding path program 17 times [2020-10-28 14:53:44,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:44,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483025319] [2020-10-28 14:53:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:44,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:44,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:53:44,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:44,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-28 14:53:44,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:44,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:53:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:53:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:44,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:44,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:44,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:44,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:44,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:44,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:44,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:44,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483025319] [2020-10-28 14:53:44,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:44,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:53:44,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658084934] [2020-10-28 14:53:44,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:53:44,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:53:44,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:53:44,940 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-10-28 14:53:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:45,097 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-28 14:53:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:53:45,097 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-28 14:53:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:45,098 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:53:45,098 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:53:45,099 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 14:53:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:53:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 14:53:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:53:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-28 14:53:45,104 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-28 14:53:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:45,104 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-28 14:53:45,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:53:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-28 14:53:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:53:45,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:45,105 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:45,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:53:45,105 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1454441581, now seen corresponding path program 18 times [2020-10-28 14:53:45,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:45,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715031959] [2020-10-28 14:53:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:45,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:45,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:53:45,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-28 14:53:45,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:45,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:53:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:53:45,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:46,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:46,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:46,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:46,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:46,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:46,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:46,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:46,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:46,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715031959] [2020-10-28 14:53:46,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:46,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:53:46,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192731546] [2020-10-28 14:53:46,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:53:46,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:53:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:53:46,181 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 22 states. [2020-10-28 14:53:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:46,340 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-28 14:53:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:53:46,340 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-28 14:53:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:46,341 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:53:46,341 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:53:46,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:53:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:53:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 14:53:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:53:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-28 14:53:46,352 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-28 14:53:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:46,353 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-28 14:53:46,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:53:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-28 14:53:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:53:46,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:46,353 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:46,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:53:46,354 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2146911023, now seen corresponding path program 19 times [2020-10-28 14:53:46,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:46,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914187252] [2020-10-28 14:53:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:46,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:46,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:53:46,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:46,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-28 14:53:46,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:46,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:46,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:53:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:53:46,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:47,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:47,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:47,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:47,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:47,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:47,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:47,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:47,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:47,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914187252] [2020-10-28 14:53:47,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:47,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:53:47,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466217105] [2020-10-28 14:53:47,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:53:47,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:53:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:53:47,298 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-10-28 14:53:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:47,457 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-28 14:53:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:53:47,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-28 14:53:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:47,459 INFO L225 Difference]: With dead ends: 62 [2020-10-28 14:53:47,459 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:53:47,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:53:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:53:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-28 14:53:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:53:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-28 14:53:47,467 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-28 14:53:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:47,468 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-28 14:53:47,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:53:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-28 14:53:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:53:47,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:47,469 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:47,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:53:47,469 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1890113905, now seen corresponding path program 20 times [2020-10-28 14:53:47,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:47,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895163252] [2020-10-28 14:53:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:48,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:48,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:53:48,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:48,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-28 14:53:48,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:48,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:48,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:53:48,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:48,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:53:48,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:48,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:48,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:48,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:48,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:48,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:48,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:48,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:48,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:48,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:48,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:53:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:48,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895163252] [2020-10-28 14:53:48,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:48,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:53:48,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349587004] [2020-10-28 14:53:48,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:53:48,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:53:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:53:48,594 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 24 states. [2020-10-28 14:53:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:48,721 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-28 14:53:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:53:48,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-28 14:53:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:48,724 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:53:48,724 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:53:48,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:53:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:53:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 14:53:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:53:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-28 14:53:48,731 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-28 14:53:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:48,731 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-28 14:53:48,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:53:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-28 14:53:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:53:48,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:48,732 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:48,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:53:48,733 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 78780621, now seen corresponding path program 21 times [2020-10-28 14:53:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:48,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426734153] [2020-10-28 14:53:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:48,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:49,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:49,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:53:49,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:49,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-28 14:53:49,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:49,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:49,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:53:49,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:49,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:53:49,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:49,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:49,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:49,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:49,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:49,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:49,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:49,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:49,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:49,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:49,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:49,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426734153] [2020-10-28 14:53:49,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:49,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:53:49,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652270863] [2020-10-28 14:53:49,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:53:49,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:49,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:53:49,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:53:49,871 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-10-28 14:53:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:50,078 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-28 14:53:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:53:50,079 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-28 14:53:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:50,080 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:53:50,080 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:53:50,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:53:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:53:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-28 14:53:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:53:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-28 14:53:50,086 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-28 14:53:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:50,086 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-28 14:53:50,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:53:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-28 14:53:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:53:50,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:50,087 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:50,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:53:50,088 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:50,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1894157429, now seen corresponding path program 22 times [2020-10-28 14:53:50,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:50,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525053038] [2020-10-28 14:53:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:50,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:50,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:50,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:53:50,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:50,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-28 14:53:50,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:50,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:53:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:50,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:53:50,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:51,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:51,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:51,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:51,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:51,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:51,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:51,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:51,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:51,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:51,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525053038] [2020-10-28 14:53:51,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:51,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:53:51,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365428949] [2020-10-28 14:53:51,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:53:51,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:53:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:53:51,210 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 26 states. [2020-10-28 14:53:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:51,416 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-28 14:53:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:53:51,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-28 14:53:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:51,417 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:53:51,417 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:53:51,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:53:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:53:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-28 14:53:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:53:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-28 14:53:51,426 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-28 14:53:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:51,426 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-28 14:53:51,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:53:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-28 14:53:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:53:51,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:51,432 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:51,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:53:51,433 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash 487921353, now seen corresponding path program 23 times [2020-10-28 14:53:51,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:51,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613814227] [2020-10-28 14:53:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:52,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:52,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:53:52,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:52,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-28 14:53:52,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:52,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:53:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:53:52,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:52,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:52,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:52,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:52,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:52,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:53:52,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:52,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:52,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:52,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613814227] [2020-10-28 14:53:52,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:52,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:53:52,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455861548] [2020-10-28 14:53:52,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:53:52,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:53:52,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:53:52,716 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-10-28 14:53:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:52,906 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-28 14:53:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:53:52,906 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-28 14:53:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:52,907 INFO L225 Difference]: With dead ends: 70 [2020-10-28 14:53:52,907 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:53:52,908 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 14:53:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:53:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 14:53:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:53:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-28 14:53:52,913 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-28 14:53:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:52,914 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-28 14:53:52,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:53:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-28 14:53:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:53:52,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:52,915 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:52,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:53:52,915 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:52,915 INFO L82 PathProgramCache]: Analyzing trace with hash 448062087, now seen corresponding path program 24 times [2020-10-28 14:53:52,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:52,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739947422] [2020-10-28 14:53:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:52,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:53,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 14:53:53,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:53,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-28 14:53:53,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:53,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:53:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:53:53,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:54,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:54,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:54,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:54,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:54,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:54,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:54,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:54,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:54,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:54,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:54,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:54,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:54,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739947422] [2020-10-28 14:53:54,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:54,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:53:54,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417132656] [2020-10-28 14:53:54,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:53:54,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:54,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:53:54,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:53:54,232 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 28 states. [2020-10-28 14:53:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:54,503 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-28 14:53:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:53:54,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-28 14:53:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:54,504 INFO L225 Difference]: With dead ends: 72 [2020-10-28 14:53:54,504 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 14:53:54,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:53:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 14:53:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 14:53:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:53:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-28 14:53:54,515 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-28 14:53:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:54,515 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-28 14:53:54,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:53:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-28 14:53:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 14:53:54,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:54,516 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:54,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:53:54,516 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash 798013125, now seen corresponding path program 25 times [2020-10-28 14:53:54,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:54,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899853300] [2020-10-28 14:53:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:55,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:55,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:53:55,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:55,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-28 14:53:55,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:55,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:55,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:53:55,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:55,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 14:53:55,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:55,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:55,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:55,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:55,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:55,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:55,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:55,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:55,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:55,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:55,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899853300] [2020-10-28 14:53:55,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:55,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:53:55,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212405957] [2020-10-28 14:53:55,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:53:55,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:53:55,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:53:55,958 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-10-28 14:53:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:56,210 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-28 14:53:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:53:56,211 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-28 14:53:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:56,212 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:53:56,212 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:53:56,213 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 14:53:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:53:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-28 14:53:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 14:53:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-28 14:53:56,218 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-28 14:53:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:56,219 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-28 14:53:56,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:53:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-28 14:53:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:53:56,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:56,220 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:56,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:53:56,220 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2093511555, now seen corresponding path program 26 times [2020-10-28 14:53:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:56,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407961341] [2020-10-28 14:53:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:53:57,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-28 14:53:57,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:53:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:53:57,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:57,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:57,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:57,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:57,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:57,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:57,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:57,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407961341] [2020-10-28 14:53:57,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:57,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:53:57,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061488080] [2020-10-28 14:53:57,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:53:57,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:53:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:53:57,644 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 30 states. [2020-10-28 14:53:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:57,848 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-28 14:53:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:53:57,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-28 14:53:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:57,849 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:53:57,849 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 14:53:57,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:53:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 14:53:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-28 14:53:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:53:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-28 14:53:57,855 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-28 14:53:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:57,855 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-28 14:53:57,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:53:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-28 14:53:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 14:53:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:57,856 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:57,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:53:57,857 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1526986945, now seen corresponding path program 27 times [2020-10-28 14:53:57,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:57,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818715424] [2020-10-28 14:53:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:57,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:58,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:53:58,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:58,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-28 14:53:58,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:58,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:53:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:53:58,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:59,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:59,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:59,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:59,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:59,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:59,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:59,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:59,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:59,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818715424] [2020-10-28 14:53:59,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:59,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:53:59,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663204204] [2020-10-28 14:53:59,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:53:59,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:53:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:53:59,315 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-10-28 14:53:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:59,580 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-28 14:53:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:53:59,581 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-28 14:53:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:59,582 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:53:59,582 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:53:59,583 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 14:53:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:53:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-28 14:53:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:53:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-28 14:53:59,588 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-28 14:53:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:59,588 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-28 14:53:59,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:53:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-28 14:53:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:53:59,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:59,589 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:59,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:53:59,589 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1737283969, now seen corresponding path program 28 times [2020-10-28 14:53:59,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:59,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840202008] [2020-10-28 14:53:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:59,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:00,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:00,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 14:54:00,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:00,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-28 14:54:00,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:00,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:54:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 14:54:00,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:01,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:01,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:01,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:01,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:01,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:01,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:01,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:01,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840202008] [2020-10-28 14:54:01,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:01,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:54:01,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326683190] [2020-10-28 14:54:01,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:54:01,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:01,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:54:01,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:54:01,165 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 32 states. [2020-10-28 14:54:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:01,408 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-28 14:54:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:54:01,408 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-28 14:54:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:01,409 INFO L225 Difference]: With dead ends: 80 [2020-10-28 14:54:01,409 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:54:01,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:54:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:54:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-28 14:54:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:54:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-28 14:54:01,415 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-28 14:54:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:01,415 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-28 14:54:01,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:54:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-28 14:54:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 14:54:01,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:01,416 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:01,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:54:01,416 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash 919461053, now seen corresponding path program 29 times [2020-10-28 14:54:01,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:01,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060580896] [2020-10-28 14:54:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 14:54:02,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:02,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-28 14:54:02,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:54:02,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:54:02,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:02,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:02,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:02,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:02,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:02,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:02,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:02,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:02,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060580896] [2020-10-28 14:54:02,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:02,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:54:02,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949786455] [2020-10-28 14:54:02,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:54:02,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:02,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:54:02,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:54:02,999 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-10-28 14:54:03,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:03,224 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-28 14:54:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:54:03,225 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-28 14:54:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:03,226 INFO L225 Difference]: With dead ends: 82 [2020-10-28 14:54:03,227 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:54:03,228 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 14:54:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:54:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-28 14:54:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 14:54:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-28 14:54:03,232 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-28 14:54:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:03,232 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-28 14:54:03,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:54:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-28 14:54:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 14:54:03,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:03,233 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:03,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:54:03,234 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1454113925, now seen corresponding path program 30 times [2020-10-28 14:54:03,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:03,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734576418] [2020-10-28 14:54:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:03,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 14:54:03,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:03,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-28 14:54:03,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:03,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:54:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 14:54:03,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:04,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:04,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:04,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:04,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:04,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:04,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:04,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:04,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:04,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734576418] [2020-10-28 14:54:04,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:04,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:54:04,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628491959] [2020-10-28 14:54:04,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:54:04,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:54:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:54:04,878 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 34 states. [2020-10-28 14:54:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:05,048 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-28 14:54:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:54:05,049 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-28 14:54:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:05,050 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:54:05,050 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:54:05,053 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 14:54:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:54:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 14:54:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:54:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-28 14:54:05,059 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-28 14:54:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:05,059 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-28 14:54:05,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:54:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-28 14:54:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 14:54:05,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:05,061 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:05,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:54:05,062 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1832033607, now seen corresponding path program 31 times [2020-10-28 14:54:05,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:05,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727085750] [2020-10-28 14:54:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:05,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:05,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:05,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 14:54:05,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:05,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 717 [2020-10-28 14:54:05,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:05,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:54:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 14:54:05,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:06,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:06,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:06,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:06,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:06,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:06,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:06,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:06,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:06,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727085750] [2020-10-28 14:54:06,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:06,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:54:06,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545637521] [2020-10-28 14:54:06,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:54:06,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:54:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:54:06,596 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-10-28 14:54:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:06,882 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-28 14:54:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:54:06,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-10-28 14:54:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:06,884 INFO L225 Difference]: With dead ends: 86 [2020-10-28 14:54:06,884 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:54:06,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:54:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:54:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-28 14:54:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:54:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-28 14:54:06,890 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-28 14:54:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:06,890 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-28 14:54:06,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:54:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-28 14:54:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 14:54:06,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:06,891 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:06,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:54:06,891 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 59372151, now seen corresponding path program 32 times [2020-10-28 14:54:06,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:06,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114929948] [2020-10-28 14:54:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:06,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:07,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:07,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:54:07,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-28 14:54:07,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:07,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:54:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 14:54:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:08,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:08,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:08,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:08,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:08,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:08,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:08,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114929948] [2020-10-28 14:54:08,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:08,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:54:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646645793] [2020-10-28 14:54:08,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:54:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:54:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:54:08,449 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 36 states. [2020-10-28 14:54:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:08,620 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-28 14:54:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:54:08,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 77 [2020-10-28 14:54:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:08,622 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:54:08,622 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:54:08,623 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 14:54:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:54:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-28 14:54:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:54:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-28 14:54:08,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-28 14:54:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:08,628 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-28 14:54:08,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:54:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-28 14:54:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 14:54:08,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:08,629 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:08,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:54:08,629 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash 929139381, now seen corresponding path program 33 times [2020-10-28 14:54:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:08,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663103699] [2020-10-28 14:54:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:09,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:09,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 14:54:09,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-28 14:54:09,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:09,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:54:09,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:09,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:54:09,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:10,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:10,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:10,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:10,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:10,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:10,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:10,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:10,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:10,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:10,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:10,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:10,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:10,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663103699] [2020-10-28 14:54:10,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:10,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:54:10,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048703145] [2020-10-28 14:54:10,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:54:10,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:10,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:54:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:54:10,226 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-10-28 14:54:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:10,536 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-28 14:54:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:54:10,537 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-10-28 14:54:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:10,538 INFO L225 Difference]: With dead ends: 90 [2020-10-28 14:54:10,538 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:54:10,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:54:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:54:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 14:54:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:54:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-28 14:54:10,544 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-28 14:54:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:10,544 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-28 14:54:10,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:54:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-28 14:54:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 14:54:10,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:10,545 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:10,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:54:10,545 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -743175309, now seen corresponding path program 34 times [2020-10-28 14:54:10,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:10,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067858901] [2020-10-28 14:54:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:11,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:11,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 14:54:11,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:11,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-28 14:54:11,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:11,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:11,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:54:11,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 14:54:11,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:12,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:12,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:12,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067858901] [2020-10-28 14:54:12,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:12,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:54:12,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805875871] [2020-10-28 14:54:12,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:54:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:12,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:54:12,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:54:12,533 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 38 states. [2020-10-28 14:54:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:12,798 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-28 14:54:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:54:12,799 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 81 [2020-10-28 14:54:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:12,800 INFO L225 Difference]: With dead ends: 92 [2020-10-28 14:54:12,800 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:54:12,801 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 14:54:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:54:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 14:54:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:54:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-28 14:54:12,806 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-28 14:54:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:12,807 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-28 14:54:12,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:54:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-28 14:54:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 14:54:12,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:12,808 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:12,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:54:12,808 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1519823695, now seen corresponding path program 35 times [2020-10-28 14:54:12,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:12,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788405842] [2020-10-28 14:54:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:12,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:13,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:13,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 14:54:13,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:13,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-28 14:54:13,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:13,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:13,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:54:13,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:13,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:54:13,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:14,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:14,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:14,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:14,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:14,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:14,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:14,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:14,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788405842] [2020-10-28 14:54:14,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:14,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:54:14,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033963498] [2020-10-28 14:54:14,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:54:14,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:54:14,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:54:14,694 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-10-28 14:54:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:14,940 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-28 14:54:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:54:14,941 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-10-28 14:54:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:14,942 INFO L225 Difference]: With dead ends: 94 [2020-10-28 14:54:14,942 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 14:54:14,943 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 14:54:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 14:54:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 14:54:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:54:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-28 14:54:14,948 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-28 14:54:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:14,948 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-28 14:54:14,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:54:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-28 14:54:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 14:54:14,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:14,949 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:14,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:54:14,949 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -554613137, now seen corresponding path program 36 times [2020-10-28 14:54:14,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:14,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243880856] [2020-10-28 14:54:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:14,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:15,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:54:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:16,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:16,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:16,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:16,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:16,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:16,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:16,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:16,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243880856] [2020-10-28 14:54:16,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:16,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:54:16,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121301621] [2020-10-28 14:54:16,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:54:16,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:16,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:54:16,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:54:16,859 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 40 states. [2020-10-28 14:54:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:17,096 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-28 14:54:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:54:17,097 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 85 [2020-10-28 14:54:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:17,098 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:54:17,099 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:54:17,100 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 14:54:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:54:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 14:54:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 14:54:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-28 14:54:17,108 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-28 14:54:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:17,108 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-28 14:54:17,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:54:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-28 14:54:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 14:54:17,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:17,110 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:17,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:54:17,110 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash -700202835, now seen corresponding path program 37 times [2020-10-28 14:54:17,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:17,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453816288] [2020-10-28 14:54:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:17,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:17,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:17,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 14:54:17,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-28 14:54:17,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:17,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:54:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:54:17,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:19,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:19,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:19,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:19,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:19,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:19,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:19,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453816288] [2020-10-28 14:54:19,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:19,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:54:19,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952229755] [2020-10-28 14:54:19,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:54:19,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:54:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:54:19,198 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-10-28 14:54:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:19,458 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-28 14:54:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:54:19,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-10-28 14:54:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:19,460 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:54:19,460 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:54:19,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:54:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:54:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-28 14:54:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:54:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-10-28 14:54:19,467 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2020-10-28 14:54:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:19,468 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-10-28 14:54:19,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:54:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-10-28 14:54:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 14:54:19,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:19,469 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:19,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:54:19,469 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1122018155, now seen corresponding path program 38 times [2020-10-28 14:54:19,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:19,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41409880] [2020-10-28 14:54:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 14:54:20,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:20,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-28 14:54:20,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:54:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:54:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:21,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:21,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:21,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:21,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:21,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41409880] [2020-10-28 14:54:21,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:21,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:54:21,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709314080] [2020-10-28 14:54:21,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:54:21,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:21,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:54:21,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:54:21,570 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 42 states. [2020-10-28 14:54:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:21,869 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-28 14:54:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:54:21,869 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 89 [2020-10-28 14:54:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:21,871 INFO L225 Difference]: With dead ends: 100 [2020-10-28 14:54:21,871 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 14:54:21,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:54:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 14:54:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-28 14:54:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 14:54:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-28 14:54:21,880 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2020-10-28 14:54:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:21,881 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-28 14:54:21,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:54:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-28 14:54:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 14:54:21,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:21,885 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:21,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:54:21,885 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash -70267223, now seen corresponding path program 39 times [2020-10-28 14:54:21,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:21,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906069815] [2020-10-28 14:54:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:21,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:22,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:22,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 14:54:22,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:22,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-28 14:54:22,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:22,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:54:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 14:54:22,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:24,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:24,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:24,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:24,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:24,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:24,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:24,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:24,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:24,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:24,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:24,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906069815] [2020-10-28 14:54:24,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:24,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:54:24,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333597140] [2020-10-28 14:54:24,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:54:24,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:54:24,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:54:24,090 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-10-28 14:54:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:24,440 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-28 14:54:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:54:24,440 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-10-28 14:54:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:24,441 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:54:24,441 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:54:24,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:54:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:54:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-28 14:54:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 14:54:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-28 14:54:24,449 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-28 14:54:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:24,449 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-28 14:54:24,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:54:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-28 14:54:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 14:54:24,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:24,451 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:24,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:54:24,451 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash 899752551, now seen corresponding path program 40 times [2020-10-28 14:54:24,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:24,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559512109] [2020-10-28 14:54:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:24,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:25,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:25,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 14:54:25,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:25,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-28 14:54:25,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:25,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 14:54:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:54:25,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:26,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:26,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:26,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:26,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:26,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:26,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:26,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:26,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:26,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:26,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559512109] [2020-10-28 14:54:26,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:26,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 14:54:26,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724047387] [2020-10-28 14:54:26,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 14:54:26,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 14:54:26,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:54:26,636 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 44 states. [2020-10-28 14:54:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:26,868 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-28 14:54:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 14:54:26,869 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 93 [2020-10-28 14:54:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:26,870 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:54:26,870 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 14:54:26,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:54:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 14:54:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-28 14:54:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 14:54:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-28 14:54:26,877 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-28 14:54:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:26,878 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-28 14:54:26,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 14:54:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-28 14:54:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 14:54:26,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:26,879 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:26,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:54:26,880 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1080852133, now seen corresponding path program 41 times [2020-10-28 14:54:26,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:26,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513490505] [2020-10-28 14:54:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:26,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 14:54:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 14:54:27,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:29,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:29,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:29,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:29,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:29,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:29,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:29,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:29,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513490505] [2020-10-28 14:54:29,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:29,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 14:54:29,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169818609] [2020-10-28 14:54:29,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 14:54:29,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 14:54:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:54:29,254 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-10-28 14:54:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:29,609 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-28 14:54:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 14:54:29,610 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-10-28 14:54:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:29,612 INFO L225 Difference]: With dead ends: 106 [2020-10-28 14:54:29,612 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:54:29,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:54:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:54:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 14:54:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:54:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-28 14:54:29,621 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-28 14:54:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:29,621 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-28 14:54:29,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 14:54:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-28 14:54:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 14:54:29,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:29,623 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:29,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:54:29,624 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:29,624 INFO L82 PathProgramCache]: Analyzing trace with hash -976108701, now seen corresponding path program 42 times [2020-10-28 14:54:29,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:29,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686337889] [2020-10-28 14:54:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:29,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 14:54:30,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:30,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1232 [2020-10-28 14:54:30,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 14:54:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 14:54:30,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:32,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:32,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:32,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:32,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686337889] [2020-10-28 14:54:32,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:32,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 14:54:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379618225] [2020-10-28 14:54:32,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 14:54:32,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 14:54:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:54:32,366 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 46 states. [2020-10-28 14:54:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:32,632 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-28 14:54:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 14:54:32,633 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 97 [2020-10-28 14:54:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:32,634 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:54:32,635 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 14:54:32,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:54:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 14:54:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-28 14:54:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 14:54:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-28 14:54:32,642 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-28 14:54:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:32,642 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-28 14:54:32,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 14:54:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-28 14:54:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 14:54:32,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:32,643 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:32,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:54:32,643 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2030514015, now seen corresponding path program 43 times [2020-10-28 14:54:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:32,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444948061] [2020-10-28 14:54:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:33,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:33,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 14:54:33,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:33,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-28 14:54:33,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:33,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 14:54:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 14:54:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:35,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:35,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:35,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444948061] [2020-10-28 14:54:35,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:35,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 14:54:35,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913289960] [2020-10-28 14:54:35,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 14:54:35,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 14:54:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:54:35,233 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-10-28 14:54:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:35,607 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-28 14:54:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 14:54:35,607 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-10-28 14:54:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:35,609 INFO L225 Difference]: With dead ends: 110 [2020-10-28 14:54:35,609 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:54:35,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:54:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:54:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 14:54:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:54:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-10-28 14:54:35,615 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2020-10-28 14:54:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:35,616 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-10-28 14:54:35,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 14:54:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-10-28 14:54:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 14:54:35,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:35,617 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:35,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:54:35,618 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1701738913, now seen corresponding path program 44 times [2020-10-28 14:54:35,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:35,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328120711] [2020-10-28 14:54:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:35,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1119 [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 14:54:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:36,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 14:54:36,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:38,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:38,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:38,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:38,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:38,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:38,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:38,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:38,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:38,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:38,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328120711] [2020-10-28 14:54:38,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:38,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 14:54:38,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682006748] [2020-10-28 14:54:38,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 14:54:38,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 14:54:38,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:54:38,355 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 48 states. [2020-10-28 14:54:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:38,744 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-28 14:54:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 14:54:38,745 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 101 [2020-10-28 14:54:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:38,746 INFO L225 Difference]: With dead ends: 112 [2020-10-28 14:54:38,746 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:54:38,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:54:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:54:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-28 14:54:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:54:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-28 14:54:38,752 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2020-10-28 14:54:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:38,752 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-28 14:54:38,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 14:54:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-28 14:54:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 14:54:38,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:38,753 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:38,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:54:38,754 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash 718521501, now seen corresponding path program 45 times [2020-10-28 14:54:38,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:38,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142626052] [2020-10-28 14:54:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:38,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:39,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:39,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 14:54:39,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:39,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-28 14:54:39,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:39,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 14:54:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 14:54:39,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:41,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:41,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:41,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:41,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:41,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142626052] [2020-10-28 14:54:41,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:41,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 14:54:41,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948880203] [2020-10-28 14:54:41,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 14:54:41,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 14:54:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:54:41,597 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 49 states. [2020-10-28 14:54:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:42,021 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-28 14:54:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 14:54:42,022 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 103 [2020-10-28 14:54:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:42,024 INFO L225 Difference]: With dead ends: 114 [2020-10-28 14:54:42,024 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:54:42,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:54:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:54:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 14:54:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 14:54:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-28 14:54:42,030 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2020-10-28 14:54:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:42,030 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-28 14:54:42,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 14:54:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-28 14:54:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 14:54:42,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:42,031 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:42,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:54:42,032 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1283495077, now seen corresponding path program 46 times [2020-10-28 14:54:42,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:42,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039690434] [2020-10-28 14:54:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:43,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:43,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 14:54:43,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:43,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-28 14:54:43,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:43,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:43,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 14:54:43,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:43,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 14:54:43,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:44,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:44,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:44,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:45,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039690434] [2020-10-28 14:54:45,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:45,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 14:54:45,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077626856] [2020-10-28 14:54:45,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 14:54:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 14:54:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:54:45,013 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 50 states. [2020-10-28 14:54:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:45,427 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-28 14:54:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 14:54:45,428 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 105 [2020-10-28 14:54:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:45,429 INFO L225 Difference]: With dead ends: 116 [2020-10-28 14:54:45,429 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 14:54:45,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:54:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 14:54:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 14:54:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 14:54:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-28 14:54:45,442 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2020-10-28 14:54:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:45,442 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-28 14:54:45,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 14:54:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-28 14:54:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 14:54:45,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:45,443 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:45,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:54:45,444 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:45,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1076077927, now seen corresponding path program 47 times [2020-10-28 14:54:45,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:45,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033326329] [2020-10-28 14:54:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:46,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:46,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 14:54:46,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:48,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:48,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:48,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:48,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:48,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:48,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033326329] [2020-10-28 14:54:48,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:48,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 14:54:48,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538496931] [2020-10-28 14:54:48,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 14:54:48,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 14:54:48,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:54:48,624 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 51 states. [2020-10-28 14:54:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:49,028 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-28 14:54:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 14:54:49,029 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 107 [2020-10-28 14:54:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:49,030 INFO L225 Difference]: With dead ends: 118 [2020-10-28 14:54:49,030 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:54:49,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:54:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:54:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-28 14:54:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:54:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-10-28 14:54:49,036 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2020-10-28 14:54:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:49,037 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-10-28 14:54:49,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 14:54:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-10-28 14:54:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 14:54:49,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:49,038 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:49,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:54:49,038 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash 683307607, now seen corresponding path program 48 times [2020-10-28 14:54:49,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:49,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141877762] [2020-10-28 14:54:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:50,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1270 [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 14:54:50,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:52,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:52,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:52,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:52,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:52,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141877762] [2020-10-28 14:54:52,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:52,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 14:54:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671030132] [2020-10-28 14:54:52,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 14:54:52,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 14:54:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:54:52,253 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 52 states. [2020-10-28 14:54:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:52,683 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-28 14:54:52,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 14:54:52,684 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 109 [2020-10-28 14:54:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:52,686 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:54:52,686 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 14:54:52,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:54:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 14:54:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-28 14:54:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:54:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-10-28 14:54:52,693 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2020-10-28 14:54:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:52,693 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-10-28 14:54:52,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 14:54:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-10-28 14:54:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 14:54:52,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:52,694 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:52,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:54:52,694 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash -764308843, now seen corresponding path program 49 times [2020-10-28 14:54:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:52,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69545085] [2020-10-28 14:54:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:52,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:54,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:54,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 14:54:54,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:54,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1405 [2020-10-28 14:54:54,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:54,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 14:54:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 14:54:54,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:56,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:56,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:56,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:56,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:56,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:56,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:56,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:56,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:56,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69545085] [2020-10-28 14:54:56,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:56,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 14:54:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292816768] [2020-10-28 14:54:56,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 14:54:56,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 14:54:56,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:54:56,097 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 53 states. [2020-10-28 14:54:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:56,528 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-28 14:54:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 14:54:56,529 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 111 [2020-10-28 14:54:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:56,530 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:54:56,530 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:54:56,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:54:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:54:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-28 14:54:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:54:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2020-10-28 14:54:56,537 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2020-10-28 14:54:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:56,537 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2020-10-28 14:54:56,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 14:54:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2020-10-28 14:54:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 14:54:56,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:56,539 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:56,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:54:56,539 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:56,539 INFO L82 PathProgramCache]: Analyzing trace with hash -354313389, now seen corresponding path program 50 times [2020-10-28 14:54:56,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:56,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506274829] [2020-10-28 14:54:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:56,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:58,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:58,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 14:54:58,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:58,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1891 [2020-10-28 14:54:58,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:58,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 14:54:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:54:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:00,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:00,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:00,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:00,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:00,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:00,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:00,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:00,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:00,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506274829] [2020-10-28 14:55:00,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:00,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 14:55:00,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931863212] [2020-10-28 14:55:00,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 14:55:00,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 14:55:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 14:55:00,492 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 54 states. [2020-10-28 14:55:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:00,760 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-28 14:55:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 14:55:00,761 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 113 [2020-10-28 14:55:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:00,762 INFO L225 Difference]: With dead ends: 124 [2020-10-28 14:55:00,763 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 14:55:00,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 14:55:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 14:55:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-28 14:55:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 14:55:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-28 14:55:00,768 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2020-10-28 14:55:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:00,769 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-28 14:55:00,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 14:55:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-28 14:55:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 14:55:00,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:00,770 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:00,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:55:00,770 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1485673327, now seen corresponding path program 51 times [2020-10-28 14:55:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:00,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990060863] [2020-10-28 14:55:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:02,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:02,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 14:55:02,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:02,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1455 [2020-10-28 14:55:02,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:02,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 14:55:02,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:02,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 14:55:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:04,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:04,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:04,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:04,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:04,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:04,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:04,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:04,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:04,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:04,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:04,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:04,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990060863] [2020-10-28 14:55:04,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:04,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-28 14:55:04,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017081067] [2020-10-28 14:55:04,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-28 14:55:04,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-28 14:55:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:55:04,396 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 55 states. [2020-10-28 14:55:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:04,807 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-28 14:55:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 14:55:04,808 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 115 [2020-10-28 14:55:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:04,809 INFO L225 Difference]: With dead ends: 126 [2020-10-28 14:55:04,809 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:55:04,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:55:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:55:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-28 14:55:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 14:55:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-28 14:55:04,818 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2020-10-28 14:55:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:04,818 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-28 14:55:04,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-28 14:55:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-28 14:55:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 14:55:04,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:04,819 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:04,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:55:04,819 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2095847857, now seen corresponding path program 52 times [2020-10-28 14:55:04,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:04,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226676563] [2020-10-28 14:55:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:04,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-28 14:55:06,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:06,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 14:55:06,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:08,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:08,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:08,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:08,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:08,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:08,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:08,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:08,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:08,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:08,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:08,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:08,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:08,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226676563] [2020-10-28 14:55:08,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:08,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-28 14:55:08,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723916642] [2020-10-28 14:55:08,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-28 14:55:08,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:08,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-28 14:55:08,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 14:55:08,570 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 56 states. [2020-10-28 14:55:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:09,046 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-28 14:55:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 14:55:09,047 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 117 [2020-10-28 14:55:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:09,048 INFO L225 Difference]: With dead ends: 128 [2020-10-28 14:55:09,048 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 14:55:09,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 14:55:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 14:55:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-28 14:55:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:55:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-10-28 14:55:09,055 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2020-10-28 14:55:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:09,056 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-10-28 14:55:09,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-28 14:55:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-10-28 14:55:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 14:55:09,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:09,057 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:09,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:55:09,057 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash -63051635, now seen corresponding path program 53 times [2020-10-28 14:55:09,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:09,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126047951] [2020-10-28 14:55:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:09,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:10,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:10,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 14:55:10,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:10,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-28 14:55:10,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:10,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 14:55:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 14:55:10,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:13,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:13,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:13,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:13,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:13,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126047951] [2020-10-28 14:55:13,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:13,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 14:55:13,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68229539] [2020-10-28 14:55:13,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 14:55:13,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:13,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 14:55:13,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:55:13,085 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 57 states. [2020-10-28 14:55:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:13,406 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-28 14:55:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 14:55:13,407 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 119 [2020-10-28 14:55:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:13,408 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:55:13,408 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:55:13,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:55:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:55:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 14:55:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 14:55:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-10-28 14:55:13,414 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2020-10-28 14:55:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:13,414 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-10-28 14:55:13,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 14:55:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-10-28 14:55:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 14:55:13,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:13,415 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:13,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:55:13,416 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:13,416 INFO L82 PathProgramCache]: Analyzing trace with hash -756001973, now seen corresponding path program 54 times [2020-10-28 14:55:13,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:13,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077127636] [2020-10-28 14:55:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:13,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:15,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:15,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 14:55:15,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:15,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1798 [2020-10-28 14:55:15,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:15,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-28 14:55:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 14:55:15,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:17,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:17,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:17,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:17,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:17,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:17,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:17,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:17,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:17,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:17,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:17,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:17,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:17,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077127636] [2020-10-28 14:55:17,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:17,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 14:55:17,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354418961] [2020-10-28 14:55:17,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 14:55:17,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:17,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 14:55:17,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 14:55:17,651 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 58 states. [2020-10-28 14:55:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:18,133 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-28 14:55:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-28 14:55:18,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 121 [2020-10-28 14:55:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:18,135 INFO L225 Difference]: With dead ends: 132 [2020-10-28 14:55:18,135 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:55:18,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 14:55:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:55:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-28 14:55:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 14:55:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-10-28 14:55:18,142 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2020-10-28 14:55:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:18,142 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-10-28 14:55:18,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 14:55:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-10-28 14:55:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 14:55:18,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:18,143 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:18,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:55:18,143 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -961345911, now seen corresponding path program 55 times [2020-10-28 14:55:18,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:18,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742182227] [2020-10-28 14:55:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:18,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:19,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:19,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 14:55:19,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:19,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-28 14:55:19,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:19,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-28 14:55:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 14:55:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:22,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:22,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:22,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:22,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:22,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:22,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:22,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:22,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:22,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:22,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:22,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:22,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742182227] [2020-10-28 14:55:22,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:22,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-28 14:55:22,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721193482] [2020-10-28 14:55:22,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-28 14:55:22,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:22,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-28 14:55:22,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:55:22,490 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 59 states. [2020-10-28 14:55:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:22,825 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-28 14:55:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 14:55:22,825 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 123 [2020-10-28 14:55:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:22,826 INFO L225 Difference]: With dead ends: 134 [2020-10-28 14:55:22,827 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:55:22,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:55:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:55:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-28 14:55:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:55:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-10-28 14:55:22,833 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2020-10-28 14:55:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:22,833 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-10-28 14:55:22,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-28 14:55:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-10-28 14:55:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 14:55:22,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:22,834 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:22,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:55:22,835 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash -728374713, now seen corresponding path program 56 times [2020-10-28 14:55:22,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:22,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207236354] [2020-10-28 14:55:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:24,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:24,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 14:55:24,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:24,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1919 [2020-10-28 14:55:24,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:24,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:24,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-28 14:55:24,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:24,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 14:55:24,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:27,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:27,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:27,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:27,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:27,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:27,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:27,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:27,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:27,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:27,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:27,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:27,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:27,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207236354] [2020-10-28 14:55:27,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:27,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-28 14:55:27,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194418719] [2020-10-28 14:55:27,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-28 14:55:27,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:27,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-28 14:55:27,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 14:55:27,408 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 60 states. [2020-10-28 14:55:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:27,915 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-28 14:55:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 14:55:27,915 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 125 [2020-10-28 14:55:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:27,917 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:55:27,917 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:55:27,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 14:55:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:55:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-28 14:55:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 14:55:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-10-28 14:55:27,922 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2020-10-28 14:55:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:27,923 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-10-28 14:55:27,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-28 14:55:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-10-28 14:55:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 14:55:27,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:27,924 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:27,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:55:27,924 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:27,924 INFO L82 PathProgramCache]: Analyzing trace with hash -181352827, now seen corresponding path program 57 times [2020-10-28 14:55:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:27,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854187397] [2020-10-28 14:55:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:29,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:29,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1734 [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 14:55:29,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:32,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:32,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:32,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:32,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:32,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:32,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:32,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:32,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:32,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854187397] [2020-10-28 14:55:32,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:32,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-28 14:55:32,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387334027] [2020-10-28 14:55:32,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-28 14:55:32,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:32,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-28 14:55:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:55:32,453 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 61 states. [2020-10-28 14:55:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:32,856 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-28 14:55:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-28 14:55:32,857 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 127 [2020-10-28 14:55:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:32,858 INFO L225 Difference]: With dead ends: 138 [2020-10-28 14:55:32,858 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 14:55:32,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:55:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 14:55:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-28 14:55:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:55:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2020-10-28 14:55:32,864 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2020-10-28 14:55:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:32,864 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2020-10-28 14:55:32,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-28 14:55:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2020-10-28 14:55:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 14:55:32,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:32,865 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:32,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:55:32,865 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1520669507, now seen corresponding path program 58 times [2020-10-28 14:55:32,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:32,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740323219] [2020-10-28 14:55:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:34,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1845 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 14:55:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:37,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:37,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:37,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:37,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:37,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:37,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:37,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740323219] [2020-10-28 14:55:37,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:37,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-28 14:55:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285644432] [2020-10-28 14:55:37,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-28 14:55:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-28 14:55:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 14:55:37,586 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 62 states. [2020-10-28 14:55:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:38,113 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-28 14:55:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 14:55:38,114 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 129 [2020-10-28 14:55:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:38,116 INFO L225 Difference]: With dead ends: 140 [2020-10-28 14:55:38,116 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 14:55:38,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 14:55:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 14:55:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-28 14:55:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 14:55:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-10-28 14:55:38,122 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2020-10-28 14:55:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:38,122 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-10-28 14:55:38,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-28 14:55:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-10-28 14:55:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-28 14:55:38,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:38,123 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:38,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 14:55:38,124 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:38,124 INFO L82 PathProgramCache]: Analyzing trace with hash 781592705, now seen corresponding path program 59 times [2020-10-28 14:55:38,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:38,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774590244] [2020-10-28 14:55:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:38,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2164 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 14:55:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:43,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:43,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:43,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:43,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:43,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:43,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:43,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:43,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:43,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:43,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:43,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:43,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774590244] [2020-10-28 14:55:43,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:43,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-28 14:55:43,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48503628] [2020-10-28 14:55:43,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-28 14:55:43,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-28 14:55:43,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:55:43,223 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 63 states. [2020-10-28 14:55:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:43,743 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-28 14:55:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-28 14:55:43,744 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 131 [2020-10-28 14:55:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:43,745 INFO L225 Difference]: With dead ends: 142 [2020-10-28 14:55:43,746 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:55:43,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:55:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:55:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-28 14:55:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 14:55:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2020-10-28 14:55:43,752 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2020-10-28 14:55:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:43,752 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2020-10-28 14:55:43,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-28 14:55:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2020-10-28 14:55:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 14:55:43,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:43,753 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:43,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 14:55:43,754 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:43,754 INFO L82 PathProgramCache]: Analyzing trace with hash -801610177, now seen corresponding path program 60 times [2020-10-28 14:55:43,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:43,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712164898] [2020-10-28 14:55:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:43,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2025 [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:45,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 14:55:45,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:48,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:48,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:48,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:48,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:48,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712164898] [2020-10-28 14:55:48,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:48,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-28 14:55:48,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762293423] [2020-10-28 14:55:48,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-28 14:55:48,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:48,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-28 14:55:48,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 14:55:48,805 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 64 states. [2020-10-28 14:55:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:49,325 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-28 14:55:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-28 14:55:49,326 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 133 [2020-10-28 14:55:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:49,328 INFO L225 Difference]: With dead ends: 144 [2020-10-28 14:55:49,328 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 14:55:49,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 14:55:49,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 14:55:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-28 14:55:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:55:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2020-10-28 14:55:49,334 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2020-10-28 14:55:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:49,335 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2020-10-28 14:55:49,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-28 14:55:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2020-10-28 14:55:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 14:55:49,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:49,336 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:49,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 14:55:49,336 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1841156995, now seen corresponding path program 61 times [2020-10-28 14:55:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:49,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997052338] [2020-10-28 14:55:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:49,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:51,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2085 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 14:55:51,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:54,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:54,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:54,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:54,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:54,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:54,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:54,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:54,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:54,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:54,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:54,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:54,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:54,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997052338] [2020-10-28 14:55:54,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:54,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-28 14:55:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245102394] [2020-10-28 14:55:54,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-28 14:55:54,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-28 14:55:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:55:54,565 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 65 states. [2020-10-28 14:55:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:54,983 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-10-28 14:55:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-28 14:55:54,984 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 135 [2020-10-28 14:55:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:54,985 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:55:54,985 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 14:55:54,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:55:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 14:55:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-28 14:55:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 14:55:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2020-10-28 14:55:54,990 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2020-10-28 14:55:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:54,991 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2020-10-28 14:55:54,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-28 14:55:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2020-10-28 14:55:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 14:55:54,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:54,992 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:54,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 14:55:54,992 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:54,993 INFO L82 PathProgramCache]: Analyzing trace with hash -118269125, now seen corresponding path program 62 times [2020-10-28 14:55:54,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:54,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916757245] [2020-10-28 14:55:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:55,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:57,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:57,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 14:55:57,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:57,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2413 [2020-10-28 14:55:57,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:57,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:57,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-28 14:55:57,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:57,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 14:55:57,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:00,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:00,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:00,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:00,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:00,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:00,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:00,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:00,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:00,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:00,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:00,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916757245] [2020-10-28 14:56:00,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:00,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-28 14:56:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532588491] [2020-10-28 14:56:00,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-28 14:56:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-28 14:56:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 14:56:00,667 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 66 states. [2020-10-28 14:56:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:01,049 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-28 14:56:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-28 14:56:01,051 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 137 [2020-10-28 14:56:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:01,052 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:56:01,053 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 14:56:01,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 14:56:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 14:56:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-28 14:56:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 14:56:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2020-10-28 14:56:01,062 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2020-10-28 14:56:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:01,063 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2020-10-28 14:56:01,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-28 14:56:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2020-10-28 14:56:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 14:56:01,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:01,064 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:01,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-28 14:56:01,064 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2014564985, now seen corresponding path program 63 times [2020-10-28 14:56:01,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:01,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17755378] [2020-10-28 14:56:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:01,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:03,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:03,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 14:56:03,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2358 [2020-10-28 14:56:03,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:03,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-28 14:56:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-28 14:56:03,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:06,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:06,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:06,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:06,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:06,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:06,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:06,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:06,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:06,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:06,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17755378] [2020-10-28 14:56:06,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:06,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-28 14:56:06,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702812704] [2020-10-28 14:56:06,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-28 14:56:06,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:06,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-28 14:56:06,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:56:06,705 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 67 states. [2020-10-28 14:56:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:07,079 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-10-28 14:56:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-28 14:56:07,080 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 139 [2020-10-28 14:56:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:07,081 INFO L225 Difference]: With dead ends: 150 [2020-10-28 14:56:07,082 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 14:56:07,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:56:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 14:56:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-28 14:56:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:56:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-10-28 14:56:07,088 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2020-10-28 14:56:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:07,088 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-10-28 14:56:07,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-28 14:56:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-10-28 14:56:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 14:56:07,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:07,089 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:07,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-28 14:56:07,090 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:07,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1326222793, now seen corresponding path program 64 times [2020-10-28 14:56:07,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:07,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997970178] [2020-10-28 14:56:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:07,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:09,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:09,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 14:56:09,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:09,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2244 [2020-10-28 14:56:09,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:09,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:09,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-28 14:56:09,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:09,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-28 14:56:09,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:12,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:12,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:12,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:12,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:12,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:12,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:12,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:12,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997970178] [2020-10-28 14:56:12,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:12,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-28 14:56:12,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581689223] [2020-10-28 14:56:12,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-28 14:56:12,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-28 14:56:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 14:56:12,670 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 68 states. [2020-10-28 14:56:13,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:13,062 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-10-28 14:56:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-28 14:56:13,063 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 141 [2020-10-28 14:56:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:13,065 INFO L225 Difference]: With dead ends: 152 [2020-10-28 14:56:13,065 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 14:56:13,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 14:56:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 14:56:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-28 14:56:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:56:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2020-10-28 14:56:13,070 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2020-10-28 14:56:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:13,071 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2020-10-28 14:56:13,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-28 14:56:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2020-10-28 14:56:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 14:56:13,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:13,072 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:13,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-28 14:56:13,072 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash 812259957, now seen corresponding path program 65 times [2020-10-28 14:56:13,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:13,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295164142] [2020-10-28 14:56:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:15,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:15,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 14:56:15,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-28 14:56:15,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:15,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-28 14:56:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 14:56:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:18,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:18,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:18,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:18,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:18,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:18,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:18,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:18,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:18,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:18,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:18,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:18,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:18,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295164142] [2020-10-28 14:56:18,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:18,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-28 14:56:18,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990237076] [2020-10-28 14:56:18,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-28 14:56:18,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:18,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-28 14:56:18,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 14:56:18,950 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 69 states. [2020-10-28 14:56:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:19,391 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-10-28 14:56:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-28 14:56:19,392 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 143 [2020-10-28 14:56:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:19,393 INFO L225 Difference]: With dead ends: 154 [2020-10-28 14:56:19,393 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 14:56:19,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 14:56:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 14:56:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-28 14:56:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 14:56:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2020-10-28 14:56:19,398 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2020-10-28 14:56:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:19,398 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2020-10-28 14:56:19,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-28 14:56:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2020-10-28 14:56:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 14:56:19,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:19,399 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:19,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-28 14:56:19,400 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1395152077, now seen corresponding path program 66 times [2020-10-28 14:56:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:19,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305072287] [2020-10-28 14:56:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:21,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2458 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-28 14:56:21,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:25,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:25,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:25,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:25,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:25,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:25,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:25,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:25,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:25,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:25,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305072287] [2020-10-28 14:56:25,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:25,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-28 14:56:25,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152777661] [2020-10-28 14:56:25,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-28 14:56:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-28 14:56:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-28 14:56:25,389 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 70 states. [2020-10-28 14:56:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:25,868 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-10-28 14:56:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-28 14:56:25,868 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 145 [2020-10-28 14:56:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:25,870 INFO L225 Difference]: With dead ends: 156 [2020-10-28 14:56:25,870 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 14:56:25,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-28 14:56:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 14:56:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-28 14:56:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 14:56:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2020-10-28 14:56:25,876 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2020-10-28 14:56:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:25,876 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2020-10-28 14:56:25,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-28 14:56:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2020-10-28 14:56:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 14:56:25,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:25,877 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:25,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-28 14:56:25,878 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1004272527, now seen corresponding path program 67 times [2020-10-28 14:56:25,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:25,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483150075] [2020-10-28 14:56:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:25,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:28,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:28,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 14:56:28,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:28,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2630 [2020-10-28 14:56:28,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:28,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-28 14:56:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 14:56:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:32,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:32,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:32,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:32,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:32,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:32,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:32,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:32,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:32,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:32,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:32,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483150075] [2020-10-28 14:56:32,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:32,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-28 14:56:32,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018972446] [2020-10-28 14:56:32,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-28 14:56:32,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-28 14:56:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:56:32,087 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 71 states. [2020-10-28 14:56:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:32,671 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-28 14:56:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-28 14:56:32,672 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 147 [2020-10-28 14:56:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:32,674 INFO L225 Difference]: With dead ends: 158 [2020-10-28 14:56:32,674 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 14:56:32,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:56:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 14:56:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-28 14:56:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 14:56:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2020-10-28 14:56:32,680 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2020-10-28 14:56:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:32,681 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2020-10-28 14:56:32,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-28 14:56:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2020-10-28 14:56:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 14:56:32,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:32,682 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:32,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-28 14:56:32,682 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:32,683 INFO L82 PathProgramCache]: Analyzing trace with hash 968820271, now seen corresponding path program 68 times [2020-10-28 14:56:32,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:32,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956134026] [2020-10-28 14:56:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:35,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2733 [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-28 14:56:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:39,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:39,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956134026] [2020-10-28 14:56:39,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:39,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-28 14:56:39,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289059363] [2020-10-28 14:56:39,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-28 14:56:39,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-28 14:56:39,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 14:56:39,171 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 72 states. [2020-10-28 14:56:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:39,780 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-10-28 14:56:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-28 14:56:39,781 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 149 [2020-10-28 14:56:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:39,783 INFO L225 Difference]: With dead ends: 160 [2020-10-28 14:56:39,783 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 14:56:39,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 14:56:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 14:56:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-28 14:56:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 14:56:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-10-28 14:56:39,788 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2020-10-28 14:56:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:39,788 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-10-28 14:56:39,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-28 14:56:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-10-28 14:56:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 14:56:39,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:39,790 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:39,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-28 14:56:39,790 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:39,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1264545683, now seen corresponding path program 69 times [2020-10-28 14:56:39,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:39,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193389664] [2020-10-28 14:56:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:42,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:42,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 14:56:42,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:42,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2715 [2020-10-28 14:56:42,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:42,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-28 14:56:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-28 14:56:42,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:46,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:46,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:46,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:46,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:46,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:46,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:46,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:46,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193389664] [2020-10-28 14:56:46,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:46,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-28 14:56:46,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182426081] [2020-10-28 14:56:46,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-28 14:56:46,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-28 14:56:46,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 14:56:46,417 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 73 states. [2020-10-28 14:56:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:46,804 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-10-28 14:56:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-28 14:56:46,805 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 151 [2020-10-28 14:56:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:46,806 INFO L225 Difference]: With dead ends: 162 [2020-10-28 14:56:46,807 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:56:46,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 14:56:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:56:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-28 14:56:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 14:56:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2020-10-28 14:56:46,811 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2020-10-28 14:56:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:46,811 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2020-10-28 14:56:46,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-28 14:56:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2020-10-28 14:56:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 14:56:46,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:46,813 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:46,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-28 14:56:46,813 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash -45579477, now seen corresponding path program 70 times [2020-10-28 14:56:46,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:46,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853763503] [2020-10-28 14:56:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:46,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:49,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2776 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 14:56:49,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:53,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:53,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:53,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:53,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:53,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:53,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:53,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:53,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853763503] [2020-10-28 14:56:53,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:53,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-28 14:56:53,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751203821] [2020-10-28 14:56:53,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-28 14:56:53,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:53,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-28 14:56:53,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-28 14:56:53,586 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 74 states. [2020-10-28 14:56:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:54,105 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-10-28 14:56:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-28 14:56:54,106 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 153 [2020-10-28 14:56:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:54,108 INFO L225 Difference]: With dead ends: 164 [2020-10-28 14:56:54,108 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 14:56:54,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-28 14:56:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 14:56:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-28 14:56:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:56:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2020-10-28 14:56:54,113 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2020-10-28 14:56:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:54,113 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2020-10-28 14:56:54,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-28 14:56:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2020-10-28 14:56:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 14:56:54,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:54,114 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:54,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-28 14:56:54,114 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:54,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:54,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1145127319, now seen corresponding path program 71 times [2020-10-28 14:56:54,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:54,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830011374] [2020-10-28 14:56:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:54,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2899 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 14:56:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:01,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:01,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:01,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:01,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:57:01,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:01,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:01,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:01,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830011374] [2020-10-28 14:57:01,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:01,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-28 14:57:01,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428031258] [2020-10-28 14:57:01,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-28 14:57:01,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:01,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-28 14:57:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 14:57:01,146 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 75 states. [2020-10-28 14:57:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:01,837 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-10-28 14:57:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-28 14:57:01,838 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 155 [2020-10-28 14:57:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:01,840 INFO L225 Difference]: With dead ends: 166 [2020-10-28 14:57:01,840 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 14:57:01,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 14:57:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 14:57:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-28 14:57:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 14:57:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2020-10-28 14:57:01,846 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2020-10-28 14:57:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:01,846 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2020-10-28 14:57:01,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-28 14:57:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2020-10-28 14:57:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 14:57:01,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:01,848 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:01,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-28 14:57:01,848 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:01,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1248648665, now seen corresponding path program 72 times [2020-10-28 14:57:01,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:01,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110902409] [2020-10-28 14:57:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:01,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:04,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:04,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 14:57:04,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2932 [2020-10-28 14:57:04,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:04,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-28 14:57:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-28 14:57:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:09,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:09,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:09,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:09,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:09,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110902409] [2020-10-28 14:57:09,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:09,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-28 14:57:09,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368917445] [2020-10-28 14:57:09,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-28 14:57:09,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:09,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-28 14:57:09,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-28 14:57:09,034 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 76 states. [2020-10-28 14:57:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:09,478 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-28 14:57:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-28 14:57:09,478 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 157 [2020-10-28 14:57:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:09,480 INFO L225 Difference]: With dead ends: 168 [2020-10-28 14:57:09,480 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 14:57:09,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-28 14:57:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 14:57:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-28 14:57:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-28 14:57:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2020-10-28 14:57:09,486 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2020-10-28 14:57:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:09,486 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2020-10-28 14:57:09,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-28 14:57:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2020-10-28 14:57:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 14:57:09,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:09,487 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:09,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-28 14:57:09,488 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1948414363, now seen corresponding path program 73 times [2020-10-28 14:57:09,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:09,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67774487] [2020-10-28 14:57:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:09,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:12,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 14:57:12,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:12,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3083 [2020-10-28 14:57:12,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:12,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-28 14:57:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 14:57:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:16,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:16,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:16,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:16,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67774487] [2020-10-28 14:57:16,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:16,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-28 14:57:16,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387909981] [2020-10-28 14:57:16,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-28 14:57:16,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:16,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-28 14:57:16,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 14:57:16,943 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 77 states. [2020-10-28 14:57:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:17,625 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-10-28 14:57:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-28 14:57:17,626 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 159 [2020-10-28 14:57:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:17,627 INFO L225 Difference]: With dead ends: 170 [2020-10-28 14:57:17,627 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 14:57:17,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 14:57:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 14:57:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-28 14:57:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:57:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-10-28 14:57:17,634 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2020-10-28 14:57:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:17,634 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-10-28 14:57:17,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-28 14:57:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-10-28 14:57:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 14:57:17,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:17,636 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:17,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-28 14:57:17,636 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash -113384669, now seen corresponding path program 74 times [2020-10-28 14:57:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:17,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939127871] [2020-10-28 14:57:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:17,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:20,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:20,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 14:57:20,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:20,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3220 [2020-10-28 14:57:20,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:20,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:20,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-28 14:57:20,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:20,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-28 14:57:20,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0