/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:51:04,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:51:04,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:51:04,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:51:04,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:51:04,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:51:04,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:51:04,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:51:04,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:51:04,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:51:04,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:51:04,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:51:04,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:51:04,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:51:04,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:51:04,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:51:04,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:51:04,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:51:04,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:51:04,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:51:04,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:51:04,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:51:04,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:51:04,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:51:04,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:51:04,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:51:04,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:51:04,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:51:04,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:51:04,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:51:04,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:51:04,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:51:04,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:51:04,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:51:04,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:51:04,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:51:04,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:51:04,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:51:04,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:51:04,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:51:04,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:51:04,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:51:04,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:51:04,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:51:04,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:51:04,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:51:04,981 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:51:04,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:51:04,982 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:51:04,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:51:04,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:51:04,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:51:04,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:51:04,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:51:04,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:51:04,984 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:51:04,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:51:04,984 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:51:04,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:51:04,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:51:04,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:51:04,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:51:04,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:51:04,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:51:04,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:51:04,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:51:04,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:51:04,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:51:04,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:51:04,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:51:04,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:51:04,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:51:05,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:51:05,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:51:05,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:51:05,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:51:05,375 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:51:05,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-27 01:51:05,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1919ed1a5/61da0e78dddc42ada7f9456a13d35990/FLAGa0220f998 [2020-10-27 01:51:06,058 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:51:06,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-27 01:51:06,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1919ed1a5/61da0e78dddc42ada7f9456a13d35990/FLAGa0220f998 [2020-10-27 01:51:06,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1919ed1a5/61da0e78dddc42ada7f9456a13d35990 [2020-10-27 01:51:06,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:51:06,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:51:06,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:51:06,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:51:06,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:51:06,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee9a349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06, skipping insertion in model container [2020-10-27 01:51:06,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:51:06,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:51:06,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:51:06,653 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:51:06,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:51:06,685 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:51:06,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06 WrapperNode [2020-10-27 01:51:06,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:51:06,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:51:06,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:51:06,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:51:06,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... [2020-10-27 01:51:06,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:51:06,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:51:06,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:51:06,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:51:06,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:51:06,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:51:06,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:51:06,791 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:51:06,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:51:06,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:51:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:51:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:51:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:51:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:51:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:51:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:51:06,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:51:06,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:51:06,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:51:06,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:51:06,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:51:06,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:51:07,012 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:51:07,012 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:51:07,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:51:07 BoogieIcfgContainer [2020-10-27 01:51:07,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:51:07,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:51:07,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:51:07,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:51:07,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:51:06" (1/3) ... [2020-10-27 01:51:07,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23170e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:51:07, skipping insertion in model container [2020-10-27 01:51:07,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:51:06" (2/3) ... [2020-10-27 01:51:07,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23170e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:51:07, skipping insertion in model container [2020-10-27 01:51:07,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:51:07" (3/3) ... [2020-10-27 01:51:07,023 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2020-10-27 01:51:07,036 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:51:07,041 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:51:07,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:51:07,125 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:51:07,126 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:51:07,126 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:51:07,128 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:51:07,128 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:51:07,128 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:51:07,128 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:51:07,129 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:51:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:51:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:51:07,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:07,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:07,170 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1007641703, now seen corresponding path program 1 times [2020-10-27 01:51:07,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:07,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254986700] [2020-10-27 01:51:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:07,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:07,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:07,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:07,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:51:07,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:07,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-27 01:51:07,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:51:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:51:07,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:51:08,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:08,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:08,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:08,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:08,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:51:08,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:08,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:08,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254986700] [2020-10-27 01:51:08,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:51:08,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:51:08,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550693192] [2020-10-27 01:51:08,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:51:08,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:51:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:51:08,084 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-27 01:51:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:08,364 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-10-27 01:51:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:51:08,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-27 01:51:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:08,375 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:51:08,375 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:51:08,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:51:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:51:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 01:51:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:51:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-27 01:51:08,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2020-10-27 01:51:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:08,421 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-27 01:51:08,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:51:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-27 01:51:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:51:08,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:08,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:08,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:51:08,423 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2025547079, now seen corresponding path program 1 times [2020-10-27 01:51:08,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:08,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720266666] [2020-10-27 01:51:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:08,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:51:08,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:08,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 01:51:08,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:51:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:08,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:51:08,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:51:08,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:08,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:08,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:08,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:51:08,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:08,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:08,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:08,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:08,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:08,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720266666] [2020-10-27 01:51:08,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:51:08,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:51:08,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120258298] [2020-10-27 01:51:08,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:51:08,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:51:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:51:08,691 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2020-10-27 01:51:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:08,758 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-27 01:51:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:51:08,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 01:51:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:08,760 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:51:08,760 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:51:08,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:51:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:51:08,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:51:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:51:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 01:51:08,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-27 01:51:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:08,768 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 01:51:08,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:51:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 01:51:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:51:08,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:08,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:08,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:51:08,769 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1836926234, now seen corresponding path program 1 times [2020-10-27 01:51:08,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:08,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648542823] [2020-10-27 01:51:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:08,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:08,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:51:08,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:08,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 01:51:08,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:51:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:51:08,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:08,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:08,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:08,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:08,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:08,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:51:08,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:08,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:08,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:08,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:08,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:51:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:08,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648542823] [2020-10-27 01:51:08,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:51:08,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:51:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69937867] [2020-10-27 01:51:08,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:51:08,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:51:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:51:08,963 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-27 01:51:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:09,035 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 01:51:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:51:09,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:51:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:09,037 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:51:09,037 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:51:09,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:51:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:51:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:51:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:51:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 01:51:09,043 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-27 01:51:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:09,043 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 01:51:09,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:51:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 01:51:09,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:51:09,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:09,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:09,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:51:09,045 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2083169366, now seen corresponding path program 1 times [2020-10-27 01:51:09,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:09,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798341673] [2020-10-27 01:51:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:09,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:09,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:51:09,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:09,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 01:51:09,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:51:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:51:09,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:09,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:09,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:09,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:09,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:09,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:09,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:09,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798341673] [2020-10-27 01:51:09,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:09,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:51:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044616122] [2020-10-27 01:51:09,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:51:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:51:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:51:09,224 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-27 01:51:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:09,323 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-27 01:51:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:51:09,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:51:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:09,324 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:51:09,324 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:51:09,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:51:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:51:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:51:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:51:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:51:09,330 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-27 01:51:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:09,330 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:51:09,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:51:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:51:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:51:09,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:09,331 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:09,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:51:09,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash 947918618, now seen corresponding path program 2 times [2020-10-27 01:51:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:09,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531986951] [2020-10-27 01:51:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:09,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:09,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:51:09,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:09,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 01:51:09,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:09,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:51:09,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:09,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:51:09,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:09,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:09,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:09,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:09,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:09,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:51:09,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:09,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:09,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531986951] [2020-10-27 01:51:09,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:09,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:51:09,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452704995] [2020-10-27 01:51:09,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:51:09,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:51:09,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:51:09,535 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-27 01:51:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:09,658 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-27 01:51:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:51:09,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:51:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:09,659 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:51:09,659 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:51:09,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:51:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:51:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:51:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:51:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 01:51:09,665 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-27 01:51:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:09,665 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 01:51:09,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:51:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 01:51:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:51:09,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:09,666 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:09,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:51:09,667 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash 422365610, now seen corresponding path program 3 times [2020-10-27 01:51:09,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:09,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673935353] [2020-10-27 01:51:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:09,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:09,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:51:09,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:09,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 01:51:09,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:09,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:51:09,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:09,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:51:09,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:09,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:09,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:09,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:09,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:09,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:09,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:51:09,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:09,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:09,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673935353] [2020-10-27 01:51:09,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:09,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:51:09,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158053450] [2020-10-27 01:51:09,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:51:09,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:51:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:51:09,896 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-10-27 01:51:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:10,062 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-27 01:51:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:51:10,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:51:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:10,063 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:51:10,063 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:51:10,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:51:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:51:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:51:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:51:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 01:51:10,070 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-27 01:51:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:10,071 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 01:51:10,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:51:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 01:51:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:51:10,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:10,072 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:10,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:51:10,072 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1310091546, now seen corresponding path program 4 times [2020-10-27 01:51:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:10,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278600000] [2020-10-27 01:51:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:10,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:51:10,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:10,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 01:51:10,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:51:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:10,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:51:10,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:10,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:10,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:10,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:10,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:10,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:10,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:10,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:10,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:10,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278600000] [2020-10-27 01:51:10,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:10,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:51:10,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815844439] [2020-10-27 01:51:10,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:51:10,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:10,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:51:10,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:51:10,309 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-10-27 01:51:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:10,488 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-27 01:51:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:51:10,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 01:51:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:10,489 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:51:10,489 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:51:10,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:51:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:51:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:51:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:51:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 01:51:10,495 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-27 01:51:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:10,495 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 01:51:10,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:51:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 01:51:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:51:10,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:10,496 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:10,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:51:10,497 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1235175510, now seen corresponding path program 5 times [2020-10-27 01:51:10,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:10,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513639674] [2020-10-27 01:51:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:10,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:10,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:51:10,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 01:51:10,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:51:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:51:10,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:10,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:10,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:10,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:10,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:10,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:10,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:10,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:10,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513639674] [2020-10-27 01:51:10,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:10,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:51:10,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263128861] [2020-10-27 01:51:10,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:51:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:51:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:51:10,770 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2020-10-27 01:51:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:11,026 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-27 01:51:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:51:11,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 01:51:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:11,028 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:51:11,028 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:51:11,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:51:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:51:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:51:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:51:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 01:51:11,033 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-27 01:51:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:11,033 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 01:51:11,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:51:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 01:51:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:51:11,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:11,034 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:11,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:51:11,035 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:11,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1465924378, now seen corresponding path program 6 times [2020-10-27 01:51:11,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:11,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403037318] [2020-10-27 01:51:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:11,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:11,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:11,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:11,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:51:11,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 01:51:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:51:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:51:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:11,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:11,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:11,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:11,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:51:11,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:11,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:11,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403037318] [2020-10-27 01:51:11,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:11,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:51:11,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142765656] [2020-10-27 01:51:11,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:51:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:51:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:51:11,380 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-10-27 01:51:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:11,777 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-27 01:51:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:51:11,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-27 01:51:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:11,778 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:51:11,778 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:51:11,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:51:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:51:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:51:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:51:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 01:51:11,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-27 01:51:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:11,786 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 01:51:11,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:51:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 01:51:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:51:11,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:11,787 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:11,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:51:11,787 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash -699325014, now seen corresponding path program 7 times [2020-10-27 01:51:11,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:11,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139834220] [2020-10-27 01:51:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:11,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:11,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:12,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:12,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:51:12,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:12,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-27 01:51:12,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:12,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:51:12,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:12,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:51:12,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:12,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:12,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:51:12,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:12,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139834220] [2020-10-27 01:51:12,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:12,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:51:12,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476293531] [2020-10-27 01:51:12,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:51:12,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:51:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:51:12,285 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2020-10-27 01:51:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:12,667 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-27 01:51:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:51:12,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-27 01:51:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:12,669 INFO L225 Difference]: With dead ends: 31 [2020-10-27 01:51:12,669 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:51:12,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:51:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:51:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:51:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:51:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 01:51:12,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-27 01:51:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:12,680 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 01:51:12,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:51:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 01:51:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:51:12,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:12,681 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:12,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:51:12,681 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash 897420570, now seen corresponding path program 8 times [2020-10-27 01:51:12,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:12,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445061443] [2020-10-27 01:51:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:12,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:12,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:13,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:13,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:51:13,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:13,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-27 01:51:13,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:13,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:51:13,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:13,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:51:13,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:13,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:13,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:13,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:13,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:13,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:13,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:51:13,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:13,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:13,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:13,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:13,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:13,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445061443] [2020-10-27 01:51:13,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:13,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:51:13,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986867242] [2020-10-27 01:51:13,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:51:13,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:51:13,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:51:13,160 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 12 states. [2020-10-27 01:51:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:13,608 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-27 01:51:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:51:13,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 01:51:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:13,611 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:51:13,611 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:51:13,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:51:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:51:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 01:51:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:51:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 01:51:13,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-27 01:51:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:13,618 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 01:51:13,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:51:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 01:51:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:51:13,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:13,619 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:13,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:51:13,619 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:13,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1143073878, now seen corresponding path program 9 times [2020-10-27 01:51:13,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:13,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897991991] [2020-10-27 01:51:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:13,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:13,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:13,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:51:13,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:13,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:51:13,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:51:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:51:13,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:14,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:14,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:14,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:14,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:14,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:14,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:51:14,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:14,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:14,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897991991] [2020-10-27 01:51:14,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:14,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:51:14,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591931035] [2020-10-27 01:51:14,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:51:14,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:51:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:51:14,085 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2020-10-27 01:51:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:14,547 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-27 01:51:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:51:14,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-27 01:51:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:14,549 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:51:14,549 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:51:14,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:51:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:51:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:51:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:51:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 01:51:14,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-27 01:51:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:14,555 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 01:51:14,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:51:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 01:51:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:51:14,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:14,556 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:14,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:51:14,556 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 26107674, now seen corresponding path program 10 times [2020-10-27 01:51:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:14,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663791879] [2020-10-27 01:51:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:14,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:14,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:51:14,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 01:51:14,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:51:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:14,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:51:14,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:15,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:15,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:15,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:15,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:15,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:15,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:15,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:15,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:15,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:15,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663791879] [2020-10-27 01:51:15,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:15,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:51:15,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670523741] [2020-10-27 01:51:15,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:51:15,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:51:15,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:51:15,065 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2020-10-27 01:51:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:15,534 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-27 01:51:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:51:15,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-27 01:51:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:15,535 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:51:15,535 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:51:15,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:51:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:51:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 01:51:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:51:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 01:51:15,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-10-27 01:51:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:15,548 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 01:51:15,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:51:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 01:51:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:51:15,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:15,549 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:15,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:51:15,551 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1910997418, now seen corresponding path program 11 times [2020-10-27 01:51:15,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:15,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472759131] [2020-10-27 01:51:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:15,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:15,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:15,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:51:15,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:15,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-27 01:51:15,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:51:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:51:15,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:16,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:16,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:16,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:16,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:16,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:16,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:16,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:16,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:16,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:16,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:16,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472759131] [2020-10-27 01:51:16,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:16,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:51:16,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15272850] [2020-10-27 01:51:16,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:51:16,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:51:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:51:16,165 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 15 states. [2020-10-27 01:51:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:16,766 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-27 01:51:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:51:16,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-27 01:51:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:16,767 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:51:16,767 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:51:16,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:51:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:51:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:51:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:51:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 01:51:16,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-27 01:51:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:16,774 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 01:51:16,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:51:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 01:51:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:51:16,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:16,775 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:16,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:51:16,776 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash 213037338, now seen corresponding path program 12 times [2020-10-27 01:51:16,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:16,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870532841] [2020-10-27 01:51:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:16,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:17,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:17,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:51:17,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:17,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 01:51:17,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:17,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:51:17,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:17,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:51:17,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:17,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:17,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:17,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:17,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:17,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:17,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:51:17,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:17,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870532841] [2020-10-27 01:51:17,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:17,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:51:17,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845658130] [2020-10-27 01:51:17,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:51:17,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:17,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:51:17,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:51:17,395 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 16 states. [2020-10-27 01:51:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:18,055 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-27 01:51:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:51:18,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-27 01:51:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:18,056 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:51:18,056 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:51:18,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:51:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:51:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:51:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:51:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 01:51:18,067 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-10-27 01:51:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:18,067 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 01:51:18,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:51:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 01:51:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:51:18,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:18,068 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:18,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:51:18,069 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:18,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:18,072 INFO L82 PathProgramCache]: Analyzing trace with hash -884117590, now seen corresponding path program 13 times [2020-10-27 01:51:18,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:18,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086115504] [2020-10-27 01:51:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:18,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:18,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:18,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:51:18,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-27 01:51:18,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:51:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:51:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:18,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:18,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:18,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:18,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:18,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:18,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:51:18,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:18,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:18,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:18,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:18,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:18,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086115504] [2020-10-27 01:51:18,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:18,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:51:18,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546948145] [2020-10-27 01:51:18,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:51:18,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:18,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:51:18,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:51:18,789 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 17 states. [2020-10-27 01:51:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:19,459 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-27 01:51:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:51:19,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-27 01:51:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:19,460 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:51:19,460 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:51:19,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:51:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:51:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:51:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:51:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 01:51:19,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-27 01:51:19,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:19,466 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 01:51:19,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:51:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 01:51:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:51:19,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:19,467 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:19,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:51:19,468 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:19,468 INFO L82 PathProgramCache]: Analyzing trace with hash -536181990, now seen corresponding path program 14 times [2020-10-27 01:51:19,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:19,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006672566] [2020-10-27 01:51:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:19,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:19,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:51:19,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:20,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:20,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:20,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:20,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:20,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:20,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:20,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006672566] [2020-10-27 01:51:20,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:20,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:51:20,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11269633] [2020-10-27 01:51:20,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:51:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:51:20,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:51:20,145 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 18 states. [2020-10-27 01:51:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:20,824 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-27 01:51:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:51:20,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-27 01:51:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:20,826 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:51:20,826 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:51:20,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:51:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:51:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 01:51:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:51:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-27 01:51:20,838 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-27 01:51:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:20,838 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-27 01:51:20,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:51:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-27 01:51:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:51:20,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:20,842 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:20,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:51:20,844 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1659887018, now seen corresponding path program 15 times [2020-10-27 01:51:20,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:20,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896647147] [2020-10-27 01:51:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:20,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:20,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:21,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:21,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:51:21,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:21,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 01:51:21,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:51:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:51:21,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:21,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:21,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:21,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:21,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:21,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896647147] [2020-10-27 01:51:21,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:21,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:51:21,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110593044] [2020-10-27 01:51:21,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:51:21,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:21,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:51:21,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:51:21,609 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 19 states. [2020-10-27 01:51:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:22,400 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 01:51:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:51:22,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-27 01:51:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:22,403 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:51:22,403 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:51:22,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:51:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:51:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:51:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:51:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 01:51:22,409 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-27 01:51:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:22,410 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 01:51:22,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:51:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 01:51:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:51:22,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:22,411 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:22,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:51:22,411 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:22,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1018549530, now seen corresponding path program 16 times [2020-10-27 01:51:22,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:22,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866001363] [2020-10-27 01:51:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:22,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:22,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:22,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:22,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:51:22,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:22,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-27 01:51:22,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:22,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:51:22,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:22,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:51:22,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:23,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:23,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:23,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:23,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866001363] [2020-10-27 01:51:23,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:23,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:51:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690444422] [2020-10-27 01:51:23,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:51:23,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:51:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:51:23,260 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 20 states. [2020-10-27 01:51:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:24,082 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-27 01:51:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:51:24,083 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-27 01:51:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:24,083 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:51:24,083 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:51:24,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:51:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:51:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 01:51:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:51:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-27 01:51:24,092 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-27 01:51:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:24,093 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-27 01:51:24,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:51:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-27 01:51:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:51:24,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:24,093 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:24,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:51:24,094 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1683043414, now seen corresponding path program 17 times [2020-10-27 01:51:24,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:24,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353146830] [2020-10-27 01:51:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:24,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:24,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:24,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:24,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:51:24,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:24,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-27 01:51:24,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:51:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:51:24,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:25,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:25,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:25,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:25,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:25,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:25,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:25,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:25,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353146830] [2020-10-27 01:51:25,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:25,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:51:25,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575806261] [2020-10-27 01:51:25,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:51:25,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:25,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:51:25,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:51:25,143 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 21 states. [2020-10-27 01:51:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:26,020 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-27 01:51:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:51:26,021 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-27 01:51:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:26,021 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:51:26,021 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:51:26,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:51:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:51:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:51:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:51:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 01:51:26,033 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-27 01:51:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:26,033 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 01:51:26,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:51:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 01:51:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:51:26,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:26,037 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:26,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:51:26,038 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 466921242, now seen corresponding path program 18 times [2020-10-27 01:51:26,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:26,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063344580] [2020-10-27 01:51:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:26,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:26,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:26,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:26,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:51:26,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:26,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-27 01:51:26,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:51:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:51:26,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:26,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:26,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:26,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:26,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:26,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:26,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:26,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:26,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:26,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063344580] [2020-10-27 01:51:26,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:26,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:51:26,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516962692] [2020-10-27 01:51:26,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:51:26,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:26,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:51:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:51:26,972 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 22 states. [2020-10-27 01:51:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:27,863 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 01:51:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:51:27,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-27 01:51:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:27,864 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:51:27,864 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:51:27,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:51:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:51:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 01:51:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:51:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 01:51:27,871 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-27 01:51:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:27,871 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 01:51:27,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:51:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 01:51:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:51:27,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:27,872 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:27,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:51:27,872 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:27,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1603651158, now seen corresponding path program 19 times [2020-10-27 01:51:27,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:27,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070190434] [2020-10-27 01:51:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:27,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:28,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:51:28,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:28,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 01:51:28,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:28,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:51:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:51:28,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:28,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:28,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:28,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:28,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:28,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:28,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070190434] [2020-10-27 01:51:28,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:28,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:51:28,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530274525] [2020-10-27 01:51:28,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:51:28,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:51:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:51:28,706 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 23 states. [2020-10-27 01:51:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:29,797 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-27 01:51:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:51:29,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-27 01:51:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:29,801 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:51:29,801 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:51:29,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:51:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:51:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:51:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:51:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 01:51:29,806 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-27 01:51:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:29,806 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 01:51:29,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:51:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 01:51:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:51:29,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:29,807 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:29,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:51:29,808 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1366886118, now seen corresponding path program 20 times [2020-10-27 01:51:29,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:29,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395126522] [2020-10-27 01:51:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:29,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:30,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:30,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:51:30,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-27 01:51:30,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:51:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:51:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:30,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:30,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:30,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:30,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:30,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:30,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:30,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:30,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395126522] [2020-10-27 01:51:30,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:30,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:51:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228077906] [2020-10-27 01:51:30,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:51:30,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:51:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:51:30,864 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 24 states. [2020-10-27 01:51:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:31,946 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-27 01:51:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:51:31,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-27 01:51:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:31,947 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:51:31,948 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:51:31,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:51:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:51:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:51:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:51:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-27 01:51:31,956 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-27 01:51:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:31,957 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-27 01:51:31,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:51:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-27 01:51:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:51:31,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:31,958 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:31,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:51:31,958 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:31,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1677862826, now seen corresponding path program 21 times [2020-10-27 01:51:31,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:31,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057894298] [2020-10-27 01:51:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:31,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:32,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:32,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:51:32,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:32,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-27 01:51:32,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:51:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:51:32,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:33,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:33,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:33,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:33,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:33,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:33,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:33,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:33,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:33,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:33,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:33,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057894298] [2020-10-27 01:51:33,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:33,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:51:33,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904270043] [2020-10-27 01:51:33,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:51:33,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:51:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:51:33,071 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 25 states. [2020-10-27 01:51:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:34,246 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-27 01:51:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:51:34,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-27 01:51:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:34,247 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:51:34,247 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:51:34,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:51:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:51:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:51:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:51:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 01:51:34,253 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-27 01:51:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:34,254 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 01:51:34,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:51:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 01:51:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:51:34,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:34,255 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:34,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:51:34,255 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1575799578, now seen corresponding path program 22 times [2020-10-27 01:51:34,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:34,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558343322] [2020-10-27 01:51:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:34,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:34,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:34,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:51:34,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:34,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-27 01:51:34,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:51:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:51:34,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:35,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:35,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:35,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:35,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:35,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:35,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:35,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:35,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:35,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:35,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:35,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558343322] [2020-10-27 01:51:35,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:35,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:51:35,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435399698] [2020-10-27 01:51:35,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:51:35,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:51:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:51:35,403 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 26 states. [2020-10-27 01:51:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:36,616 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-27 01:51:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:51:36,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-27 01:51:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:36,618 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:51:36,618 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:51:36,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:51:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:51:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:51:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:51:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-27 01:51:36,623 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-27 01:51:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:36,623 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-27 01:51:36,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:51:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-27 01:51:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:51:36,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:36,624 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:36,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:51:36,624 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1588161110, now seen corresponding path program 23 times [2020-10-27 01:51:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:36,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080182041] [2020-10-27 01:51:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:51:37,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:37,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:37,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:37,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:37,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:37,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080182041] [2020-10-27 01:51:37,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:37,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:51:37,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075636803] [2020-10-27 01:51:37,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:51:37,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:37,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:51:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:51:37,813 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 27 states. [2020-10-27 01:51:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:39,192 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-27 01:51:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:51:39,193 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-27 01:51:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:39,194 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:51:39,194 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:51:39,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:51:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:51:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:51:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:51:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 01:51:39,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-27 01:51:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:39,199 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 01:51:39,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:51:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 01:51:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:51:39,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:39,200 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:39,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:51:39,200 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:39,200 INFO L82 PathProgramCache]: Analyzing trace with hash -886694630, now seen corresponding path program 24 times [2020-10-27 01:51:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:39,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054716420] [2020-10-27 01:51:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:39,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:39,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:39,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:39,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:51:39,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:39,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-27 01:51:39,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:39,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:51:39,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:39,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:51:39,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:40,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:40,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:40,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:40,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:40,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:40,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:40,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054716420] [2020-10-27 01:51:40,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:40,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:51:40,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898835909] [2020-10-27 01:51:40,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:51:40,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:51:40,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:51:40,445 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 28 states. [2020-10-27 01:51:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:41,882 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-27 01:51:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:51:41,882 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-27 01:51:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:41,883 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:51:41,883 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:51:41,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:51:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:51:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:51:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:51:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-27 01:51:41,889 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-27 01:51:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:41,889 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-27 01:51:41,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:51:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-27 01:51:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:51:41,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:41,890 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:41,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:51:41,890 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:41,891 INFO L82 PathProgramCache]: Analyzing trace with hash -616070230, now seen corresponding path program 25 times [2020-10-27 01:51:41,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:41,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501721234] [2020-10-27 01:51:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:41,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:42,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:51:42,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:43,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:43,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:43,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:43,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:43,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:43,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:43,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:43,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:51:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:43,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501721234] [2020-10-27 01:51:43,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:43,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:51:43,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660607278] [2020-10-27 01:51:43,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:51:43,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:51:43,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:51:43,178 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 29 states. [2020-10-27 01:51:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:44,695 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-27 01:51:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:51:44,697 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-27 01:51:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:44,698 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:51:44,698 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:51:44,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:51:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:51:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:51:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:51:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 01:51:44,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-27 01:51:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:44,703 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 01:51:44,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:51:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 01:51:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:51:44,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:44,703 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:44,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:51:44,703 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -816648422, now seen corresponding path program 26 times [2020-10-27 01:51:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:44,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186160622] [2020-10-27 01:51:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:45,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:45,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:51:45,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:45,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-27 01:51:45,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:45,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:51:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:51:45,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:45,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:45,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:45,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:45,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:45,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:51:45,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:45,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:45,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186160622] [2020-10-27 01:51:45,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:45,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:51:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337525551] [2020-10-27 01:51:45,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:51:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:51:45,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:51:45,943 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 30 states. [2020-10-27 01:51:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:47,569 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-27 01:51:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:51:47,569 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-27 01:51:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:47,570 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:51:47,570 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:51:47,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:51:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:51:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 01:51:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:51:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-27 01:51:47,576 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-10-27 01:51:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:47,576 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-27 01:51:47,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:51:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-27 01:51:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:51:47,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:47,577 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:47,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:51:47,577 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1555362218, now seen corresponding path program 27 times [2020-10-27 01:51:47,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:47,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770394646] [2020-10-27 01:51:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:47,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:48,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 663 [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:51:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:48,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:48,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:48,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:48,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:48,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:48,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:48,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:48,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:48,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770394646] [2020-10-27 01:51:48,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:48,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:51:48,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518844037] [2020-10-27 01:51:48,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:51:48,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:48,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:51:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:51:48,896 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 31 states. [2020-10-27 01:51:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:50,608 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-27 01:51:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:51:50,608 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-27 01:51:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:50,609 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:51:50,609 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:51:50,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:51:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:51:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:51:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:51:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 01:51:50,615 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-27 01:51:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:50,615 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 01:51:50,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:51:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 01:51:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:51:50,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:50,616 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:50,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:51:50,616 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:50,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2073248026, now seen corresponding path program 28 times [2020-10-27 01:51:50,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:50,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427485025] [2020-10-27 01:51:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:50,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:51,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:51,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:51:51,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:51,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-27 01:51:51,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:51,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:51:51,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:51:51,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:52,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:52,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:52,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:52,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:52,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:52,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:52,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427485025] [2020-10-27 01:51:52,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:52,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:51:52,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699091138] [2020-10-27 01:51:52,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:51:52,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:51:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:51:52,083 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 32 states. [2020-10-27 01:51:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:53,814 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-27 01:51:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:51:53,815 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-27 01:51:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:53,816 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:51:53,816 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:51:53,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:51:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:51:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 01:51:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:51:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 01:51:53,821 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-27 01:51:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:53,821 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 01:51:53,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:51:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 01:51:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:51:53,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:53,822 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:53,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:51:53,823 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:53,823 INFO L82 PathProgramCache]: Analyzing trace with hash 947838890, now seen corresponding path program 29 times [2020-10-27 01:51:53,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:53,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537512517] [2020-10-27 01:51:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:53,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:54,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:54,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:51:54,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-27 01:51:54,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:51:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:51:54,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:55,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:55,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:55,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:55,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:55,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:55,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:55,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:55,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:55,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537512517] [2020-10-27 01:51:55,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:55,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:51:55,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547259051] [2020-10-27 01:51:55,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:51:55,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:51:55,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:51:55,289 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 33 states. [2020-10-27 01:51:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:57,215 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 01:51:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:51:57,215 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-27 01:51:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:57,216 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:51:57,216 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:51:57,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:51:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:51:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:51:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:51:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 01:51:57,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-27 01:51:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:57,221 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 01:51:57,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:51:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 01:51:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:51:57,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:57,222 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:57,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:51:57,222 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash 419894042, now seen corresponding path program 30 times [2020-10-27 01:51:57,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:57,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940695530] [2020-10-27 01:51:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:57,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:58,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:51:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:58,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:58,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:58,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:51:58,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:51:58,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940695530] [2020-10-27 01:51:58,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:58,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:51:58,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086290830] [2020-10-27 01:51:58,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:51:58,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:51:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:51:58,805 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 34 states. [2020-10-27 01:52:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:00,723 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-27 01:52:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:52:00,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-27 01:52:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:00,725 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:52:00,725 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:52:00,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:52:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:52:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:52:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:52:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-27 01:52:00,730 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-10-27 01:52:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:00,730 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-27 01:52:00,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:52:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-27 01:52:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:52:00,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:00,731 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:00,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:52:00,731 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1233472938, now seen corresponding path program 31 times [2020-10-27 01:52:00,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:00,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129438959] [2020-10-27 01:52:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:00,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:01,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:01,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:52:01,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:01,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-27 01:52:01,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:52:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:52:01,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:02,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:02,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:02,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:02,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:02,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:02,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:02,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:02,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129438959] [2020-10-27 01:52:02,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:02,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:52:02,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728913544] [2020-10-27 01:52:02,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:52:02,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:52:02,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:52:02,464 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 35 states. [2020-10-27 01:52:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:04,539 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-27 01:52:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:52:04,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-10-27 01:52:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:04,541 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:52:04,541 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:52:04,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:52:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:52:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:52:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:52:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 01:52:04,546 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-27 01:52:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:04,546 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 01:52:04,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:52:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 01:52:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:52:04,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:04,547 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:04,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:52:04,547 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash 684614938, now seen corresponding path program 32 times [2020-10-27 01:52:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:04,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992498251] [2020-10-27 01:52:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:05,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:52:05,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:06,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:06,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:06,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:06,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:06,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:06,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:06,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992498251] [2020-10-27 01:52:06,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:06,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:52:06,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26044645] [2020-10-27 01:52:06,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:52:06,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:06,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:52:06,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:52:06,533 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 36 states. [2020-10-27 01:52:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:08,644 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-27 01:52:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:52:08,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2020-10-27 01:52:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:08,646 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:52:08,646 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:52:08,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:52:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:52:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 01:52:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:52:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-27 01:52:08,648 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-10-27 01:52:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:08,649 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-27 01:52:08,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:52:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-27 01:52:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:52:08,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:08,650 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:08,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:52:08,650 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash 849886122, now seen corresponding path program 33 times [2020-10-27 01:52:08,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:08,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168531047] [2020-10-27 01:52:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:08,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:08,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:09,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:09,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:52:09,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-27 01:52:09,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:52:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:52:09,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:10,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:10,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:10,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168531047] [2020-10-27 01:52:10,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:10,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:52:10,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931711824] [2020-10-27 01:52:10,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:52:10,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:52:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:52:10,698 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 37 states. [2020-10-27 01:52:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:12,952 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-27 01:52:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:52:12,954 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 48 [2020-10-27 01:52:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:12,955 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:52:12,955 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:52:12,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:52:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:52:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:52:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:52:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 01:52:12,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-27 01:52:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:12,958 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 01:52:12,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:52:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 01:52:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:52:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:12,959 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:12,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:52:12,959 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1678325530, now seen corresponding path program 34 times [2020-10-27 01:52:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:12,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586356653] [2020-10-27 01:52:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:12,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:12,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:13,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:52:13,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:14,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:14,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:14,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:14,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:14,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:14,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:14,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:14,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586356653] [2020-10-27 01:52:14,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:14,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:52:14,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816367280] [2020-10-27 01:52:14,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:52:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:52:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:52:14,927 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 38 states. [2020-10-27 01:52:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:17,285 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-27 01:52:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:52:17,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 49 [2020-10-27 01:52:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:17,287 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:52:17,287 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:52:17,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:52:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:52:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:52:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:52:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-27 01:52:17,292 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-27 01:52:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:17,292 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-27 01:52:17,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:52:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-27 01:52:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:52:17,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:17,293 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:17,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:52:17,293 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1590143402, now seen corresponding path program 35 times [2020-10-27 01:52:17,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:17,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636916984] [2020-10-27 01:52:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:17,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:18,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:52:18,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:19,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:19,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:19,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:19,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:19,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:19,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:19,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:19,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:19,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636916984] [2020-10-27 01:52:19,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:19,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:52:19,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405426158] [2020-10-27 01:52:19,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:52:19,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:52:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:52:19,315 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 39 states. [2020-10-27 01:52:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:21,842 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-27 01:52:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:52:21,843 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-10-27 01:52:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:21,844 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:52:21,844 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:52:21,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:52:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:52:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:52:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:52:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 01:52:21,847 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-27 01:52:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:21,848 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 01:52:21,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:52:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 01:52:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:52:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:21,848 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:21,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:52:21,848 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1143502566, now seen corresponding path program 36 times [2020-10-27 01:52:21,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:21,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048193259] [2020-10-27 01:52:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:21,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:21,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:22,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:52:22,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:23,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:23,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:23,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:23,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:23,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:23,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:23,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:23,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048193259] [2020-10-27 01:52:23,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:23,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:52:23,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475617340] [2020-10-27 01:52:23,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:52:23,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:52:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:52:23,934 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 40 states. [2020-10-27 01:52:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:26,480 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-27 01:52:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:52:26,480 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-10-27 01:52:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:26,481 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:52:26,481 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:52:26,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:52:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:52:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 01:52:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:52:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 01:52:26,486 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-27 01:52:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:26,486 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 01:52:26,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:52:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 01:52:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:52:26,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:26,487 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:26,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:52:26,487 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:26,487 INFO L82 PathProgramCache]: Analyzing trace with hash 12818346, now seen corresponding path program 37 times [2020-10-27 01:52:26,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:26,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11117543] [2020-10-27 01:52:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:26,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:27,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:27,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:52:27,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:27,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-27 01:52:27,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:27,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:52:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:52:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:28,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:28,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:28,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:28,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:28,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:28,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:28,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:28,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:28,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:28,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:28,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:28,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11117543] [2020-10-27 01:52:28,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:28,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:52:28,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34454292] [2020-10-27 01:52:28,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:52:28,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:52:28,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:52:28,801 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 41 states. [2020-10-27 01:52:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:31,453 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-27 01:52:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:52:31,458 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2020-10-27 01:52:31,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:31,459 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:52:31,459 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:52:31,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:52:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:52:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:52:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:52:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 01:52:31,463 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-27 01:52:31,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:31,463 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 01:52:31,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:52:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 01:52:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:52:31,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:31,464 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:31,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:52:31,464 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1499028250, now seen corresponding path program 38 times [2020-10-27 01:52:31,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:31,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510740083] [2020-10-27 01:52:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:31,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:31,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:32,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:52:32,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:32,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-10-27 01:52:32,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:52:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:52:32,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:33,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:33,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:33,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510740083] [2020-10-27 01:52:33,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:33,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:52:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970707708] [2020-10-27 01:52:33,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:52:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:52:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:52:33,843 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 42 states. [2020-10-27 01:52:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:36,629 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-27 01:52:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:52:36,630 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-27 01:52:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:36,630 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:52:36,631 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:52:36,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:52:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:52:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:52:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:52:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-27 01:52:36,636 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-10-27 01:52:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:36,636 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-27 01:52:36,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:52:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-27 01:52:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:52:36,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:36,637 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:36,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:52:36,637 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:36,638 INFO L82 PathProgramCache]: Analyzing trace with hash 326895018, now seen corresponding path program 39 times [2020-10-27 01:52:36,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:36,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075872181] [2020-10-27 01:52:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:36,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:36,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:38,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:38,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:52:38,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-27 01:52:38,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:52:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:52:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:39,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:39,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:39,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:39,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:39,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:39,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:39,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:39,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075872181] [2020-10-27 01:52:39,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:39,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:52:39,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039124162] [2020-10-27 01:52:39,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:52:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:52:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:52:39,285 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 43 states. [2020-10-27 01:52:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:42,197 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-27 01:52:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:52:42,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 54 [2020-10-27 01:52:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:42,198 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:52:42,198 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:52:42,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:52:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:52:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:52:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:52:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 01:52:42,202 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-27 01:52:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:42,202 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 01:52:42,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:52:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 01:52:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:52:42,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:42,203 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:42,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:52:42,203 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1649496806, now seen corresponding path program 40 times [2020-10-27 01:52:42,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:42,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320350463] [2020-10-27 01:52:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:42,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:42,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:43,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1364 [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:52:43,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:44,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:44,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:44,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:44,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:44,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:44,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:44,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:44,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:44,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:44,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:44,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:44,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320350463] [2020-10-27 01:52:44,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:44,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:52:44,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146174820] [2020-10-27 01:52:44,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:52:44,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:52:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:52:44,913 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 44 states. [2020-10-27 01:52:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:47,903 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-27 01:52:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:52:47,904 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 55 [2020-10-27 01:52:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:47,905 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:52:47,905 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:52:47,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:52:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:52:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 01:52:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:52:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-27 01:52:47,908 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-10-27 01:52:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:47,909 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-27 01:52:47,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:52:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-27 01:52:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:52:47,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:47,909 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:47,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:52:47,910 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1506866090, now seen corresponding path program 41 times [2020-10-27 01:52:47,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:47,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298275393] [2020-10-27 01:52:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:47,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:47,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1269 [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:52:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:50,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:50,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:50,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:50,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:50,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:50,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:50,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:50,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:50,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:50,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:50,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298275393] [2020-10-27 01:52:50,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:50,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:52:50,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348001924] [2020-10-27 01:52:50,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:52:50,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:50,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:52:50,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:52:50,574 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 45 states. [2020-10-27 01:52:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:53,643 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 01:52:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:52:53,643 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 56 [2020-10-27 01:52:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:53,644 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:52:53,644 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:52:53,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:52:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:52:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:52:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:52:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 01:52:53,648 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-27 01:52:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:53,649 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 01:52:53,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:52:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 01:52:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:52:53,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:53,649 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:53,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:52:53,650 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash 569868058, now seen corresponding path program 42 times [2020-10-27 01:52:53,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:53,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630851278] [2020-10-27 01:52:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:53,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:54,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:54,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:52:54,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:54,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-27 01:52:54,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:52:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:52:54,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:56,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:56,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:56,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:56,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:56,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:56,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:56,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:56,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:52:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630851278] [2020-10-27 01:52:56,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:56,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:52:56,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790690050] [2020-10-27 01:52:56,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:52:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:52:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:52:56,443 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 46 states. [2020-10-27 01:52:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:59,694 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-27 01:52:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:52:59,695 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 57 [2020-10-27 01:52:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:59,696 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:52:59,696 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:52:59,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:52:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:52:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 01:52:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:52:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-27 01:52:59,701 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-27 01:52:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:59,701 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-27 01:52:59,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:52:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-27 01:52:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:52:59,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:59,702 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:59,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:52:59,702 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1587700138, now seen corresponding path program 43 times [2020-10-27 01:52:59,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:59,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907225525] [2020-10-27 01:52:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:59,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:59,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:01,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:01,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:53:01,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:01,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1422 [2020-10-27 01:53:01,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:53:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:53:01,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:02,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:02,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:02,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:02,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907225525] [2020-10-27 01:53:02,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:02,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:53:02,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948909893] [2020-10-27 01:53:02,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:53:02,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:53:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:53:02,648 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 47 states. [2020-10-27 01:53:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:06,011 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-27 01:53:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:53:06,013 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2020-10-27 01:53:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:06,013 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:53:06,014 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:53:06,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:53:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:53:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:53:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:53:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 01:53:06,017 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-27 01:53:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:06,017 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 01:53:06,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:53:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 01:53:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:53:06,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:06,018 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:06,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:53:06,018 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1219243750, now seen corresponding path program 44 times [2020-10-27 01:53:06,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:06,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667863823] [2020-10-27 01:53:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:06,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:07,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:07,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:53:07,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:07,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-27 01:53:07,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:53:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:53:07,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:09,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:09,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:09,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:09,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:09,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:09,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:53:09,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:09,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:09,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667863823] [2020-10-27 01:53:09,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:09,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:53:09,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490874275] [2020-10-27 01:53:09,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:53:09,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:09,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:53:09,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:53:09,141 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 48 states. [2020-10-27 01:53:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:12,681 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-27 01:53:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:53:12,682 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 59 [2020-10-27 01:53:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:12,683 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:53:12,683 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:53:12,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:53:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:53:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 01:53:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:53:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-27 01:53:12,686 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-10-27 01:53:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:12,686 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-27 01:53:12,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:53:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-27 01:53:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:53:12,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:12,687 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:12,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:53:12,687 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:12,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1959808938, now seen corresponding path program 45 times [2020-10-27 01:53:12,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:12,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602813852] [2020-10-27 01:53:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:14,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:14,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:53:14,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:14,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-27 01:53:14,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:53:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:53:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:15,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:15,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:15,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:15,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:15,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:15,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:15,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:15,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:15,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:15,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:15,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:15,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602813852] [2020-10-27 01:53:15,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:15,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:53:15,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854759151] [2020-10-27 01:53:15,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:53:15,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:15,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:53:15,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:53:15,948 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 49 states. [2020-10-27 01:53:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:19,515 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-27 01:53:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:53:19,516 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 60 [2020-10-27 01:53:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:19,517 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:53:19,517 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:53:19,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:53:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:53:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 01:53:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:53:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 01:53:19,522 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-27 01:53:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:19,522 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 01:53:19,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:53:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 01:53:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:53:19,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:19,522 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:19,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:53:19,523 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:19,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:19,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1726194458, now seen corresponding path program 46 times [2020-10-27 01:53:19,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:19,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612123988] [2020-10-27 01:53:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:19,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:19,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:21,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:21,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:53:21,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:21,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1757 [2020-10-27 01:53:21,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:53:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:53:21,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:23,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:23,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:23,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612123988] [2020-10-27 01:53:23,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:23,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:53:23,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108639327] [2020-10-27 01:53:23,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:53:23,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:53:23,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:53:23,019 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 50 states. [2020-10-27 01:53:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:26,821 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-27 01:53:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:53:26,826 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 61 [2020-10-27 01:53:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:26,827 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:53:26,827 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:53:26,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:53:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:53:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-27 01:53:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:53:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 01:53:26,832 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-27 01:53:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:26,832 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 01:53:26,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:53:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 01:53:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:53:26,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:26,833 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:26,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:53:26,833 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1220887126, now seen corresponding path program 47 times [2020-10-27 01:53:26,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:26,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437651732] [2020-10-27 01:53:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:28,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:28,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:53:28,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:28,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1829 [2020-10-27 01:53:28,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:28,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:53:28,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:28,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:53:28,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:30,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:30,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:30,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:30,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:30,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:53:30,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:30,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437651732] [2020-10-27 01:53:30,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:30,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:53:30,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359293234] [2020-10-27 01:53:30,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:53:30,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:30,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:53:30,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:53:30,499 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 51 states. [2020-10-27 01:53:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:34,462 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-27 01:53:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:53:34,463 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 62 [2020-10-27 01:53:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:34,464 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:53:34,464 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:53:34,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:53:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:53:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 01:53:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:53:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-27 01:53:34,468 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-27 01:53:34,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:34,469 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-27 01:53:34,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:53:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-27 01:53:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:53:34,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:34,469 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:34,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:53:34,470 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:34,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1908864282, now seen corresponding path program 48 times [2020-10-27 01:53:34,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:34,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315614233] [2020-10-27 01:53:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:34,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:34,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:36,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:36,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:53:36,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:36,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2041 [2020-10-27 01:53:36,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:53:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:53:36,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:38,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:38,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:38,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:38,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:38,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:38,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:38,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:38,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315614233] [2020-10-27 01:53:38,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:38,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:53:38,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145725934] [2020-10-27 01:53:38,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:53:38,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:53:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:53:38,411 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 52 states. [2020-10-27 01:53:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:42,460 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-27 01:53:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:53:42,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2020-10-27 01:53:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:42,462 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:53:42,462 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:53:42,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:53:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:53:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 01:53:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:53:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-27 01:53:42,467 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-27 01:53:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:42,467 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-27 01:53:42,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:53:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-27 01:53:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:53:42,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:42,468 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:42,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:53:42,468 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:42,468 INFO L82 PathProgramCache]: Analyzing trace with hash 146910122, now seen corresponding path program 49 times [2020-10-27 01:53:42,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:42,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251690753] [2020-10-27 01:53:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:42,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:42,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:44,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:44,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:53:44,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:44,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1923 [2020-10-27 01:53:44,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:44,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:53:44,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:44,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:53:44,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:46,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:46,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:46,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:46,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:46,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:46,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251690753] [2020-10-27 01:53:46,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:46,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:53:46,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299681610] [2020-10-27 01:53:46,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:53:46,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:46,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:53:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:53:46,431 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 53 states. [2020-10-27 01:53:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:50,671 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 01:53:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:53:50,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 64 [2020-10-27 01:53:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:50,672 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:53:50,673 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:53:50,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:53:50,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:53:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:53:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:53:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 01:53:50,677 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-27 01:53:50,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:50,677 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 01:53:50,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:53:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 01:53:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:53:50,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:50,678 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:50,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:53:50,678 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:50,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1360906010, now seen corresponding path program 50 times [2020-10-27 01:53:50,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:50,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8347423] [2020-10-27 01:53:50,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:50,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:52,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1956 [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:53:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:54,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:54,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:54,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:54,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:54,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:53:54,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8347423] [2020-10-27 01:53:54,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:54,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:53:54,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952516017] [2020-10-27 01:53:54,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:53:54,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:54,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:53:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:53:54,727 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 54 states. [2020-10-27 01:53:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:59,065 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-27 01:53:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:53:59,066 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 65 [2020-10-27 01:53:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:59,067 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:53:59,067 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:53:59,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 01:53:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:53:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 01:53:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:53:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-27 01:53:59,072 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-10-27 01:53:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:59,072 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-27 01:53:59,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:53:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-27 01:53:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:53:59,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:59,073 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:59,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:53:59,073 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash 340072874, now seen corresponding path program 51 times [2020-10-27 01:53:59,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:59,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331787062] [2020-10-27 01:53:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:59,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:59,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:01,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:01,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:54:01,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2287 [2020-10-27 01:54:01,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 01:54:01,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:01,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:54:01,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:03,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:03,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:03,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:03,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:03,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:54:03,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:03,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:54:03,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331787062] [2020-10-27 01:54:03,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:03,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 01:54:03,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415249007] [2020-10-27 01:54:03,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 01:54:03,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:03,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 01:54:03,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:54:03,518 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 55 states. [2020-10-27 01:54:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:08,087 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-27 01:54:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 01:54:08,088 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 66 [2020-10-27 01:54:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:08,089 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:54:08,089 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:54:08,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 01:54:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:54:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 01:54:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:54:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-27 01:54:08,093 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-27 01:54:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:08,094 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-27 01:54:08,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 01:54:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-27 01:54:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:54:08,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:08,094 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:08,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:54:08,095 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1240983270, now seen corresponding path program 52 times [2020-10-27 01:54:08,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:08,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764988898] [2020-10-27 01:54:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:08,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2167 [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:54:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:54:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764988898] [2020-10-27 01:54:12,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:12,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 01:54:12,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973407139] [2020-10-27 01:54:12,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 01:54:12,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:12,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 01:54:12,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:54:12,496 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 56 states. [2020-10-27 01:54:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:17,188 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-27 01:54:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:54:17,189 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 67 [2020-10-27 01:54:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:17,190 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:54:17,190 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:54:17,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 01:54:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:54:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-27 01:54:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:54:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-27 01:54:17,194 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-27 01:54:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:17,195 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-27 01:54:17,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 01:54:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-27 01:54:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:54:17,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:17,195 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:17,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:54:17,196 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:17,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1285883818, now seen corresponding path program 53 times [2020-10-27 01:54:17,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:17,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970756836] [2020-10-27 01:54:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:17,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:17,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:19,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:19,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:54:19,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:19,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1922 [2020-10-27 01:54:19,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 01:54:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:19,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:54:19,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:21,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:21,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:21,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:21,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:21,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:21,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:54:21,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:21,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:54:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970756836] [2020-10-27 01:54:21,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:21,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 01:54:21,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031538574] [2020-10-27 01:54:21,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 01:54:21,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 01:54:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:54:21,437 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 57 states. [2020-10-27 01:54:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:26,109 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-27 01:54:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 01:54:26,110 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 68 [2020-10-27 01:54:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:26,111 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:54:26,111 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:54:26,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 01:54:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:54:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 01:54:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:54:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 01:54:26,115 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-27 01:54:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:26,115 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 01:54:26,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 01:54:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 01:54:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:54:26,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:26,116 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:26,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:54:26,116 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1985615078, now seen corresponding path program 54 times [2020-10-27 01:54:26,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:26,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406571481] [2020-10-27 01:54:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:26,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:28,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:28,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:54:28,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:28,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2353 [2020-10-27 01:54:28,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 01:54:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:54:28,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 01:54:30,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:30,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:30,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:30,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:30,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:54:30,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:30,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1486 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:54:30,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406571481] [2020-10-27 01:54:30,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:30,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 01:54:30,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551938033] [2020-10-27 01:54:30,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 01:54:30,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:30,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 01:54:30,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:54:30,895 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 58 states. [2020-10-27 01:54:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:35,926 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 01:54:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 01:54:35,927 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 69 [2020-10-27 01:54:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:35,928 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:54:35,928 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:54:35,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 01:54:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:54:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 01:54:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:54:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-27 01:54:35,933 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-10-27 01:54:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:35,933 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-27 01:54:35,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 01:54:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-27 01:54:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:54:35,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:35,934 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:35,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:54:35,935 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash -322865750, now seen corresponding path program 55 times [2020-10-27 01:54:35,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:35,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410988569] [2020-10-27 01:54:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:35,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2444 [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:54:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:40,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:40,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:40,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:40,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:40,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:40,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:54:40,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:40,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:40,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:40,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:40,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:54:40,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410988569] [2020-10-27 01:54:40,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:40,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 01:54:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969592453] [2020-10-27 01:54:40,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 01:54:40,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 01:54:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:54:40,955 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 59 states. [2020-10-27 01:54:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:46,117 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 01:54:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 01:54:46,118 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 70 [2020-10-27 01:54:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:46,119 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:54:46,119 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:54:46,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-27 01:54:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:54:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:54:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:54:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 01:54:46,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-27 01:54:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:46,123 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 01:54:46,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 01:54:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 01:54:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:54:46,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:46,124 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:46,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:54:46,124 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash -317244134, now seen corresponding path program 56 times [2020-10-27 01:54:46,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:46,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083179251] [2020-10-27 01:54:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:46,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:46,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2543 [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:54:48,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:51,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:51,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:51,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:51,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:51,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:54:51,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:51,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:51,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:51,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:51,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:54:51,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083179251] [2020-10-27 01:54:51,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:51,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 01:54:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575559345] [2020-10-27 01:54:51,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 01:54:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 01:54:51,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:54:51,292 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 60 states. [2020-10-27 01:54:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:56,513 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-27 01:54:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 01:54:56,514 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 71 [2020-10-27 01:54:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:56,515 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:54:56,515 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:54:56,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-27 01:54:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:54:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-27 01:54:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:54:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-27 01:54:56,522 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-10-27 01:54:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:56,522 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-27 01:54:56,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 01:54:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-27 01:54:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:54:56,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:56,523 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:56,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:54:56,523 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash -142974038, now seen corresponding path program 57 times [2020-10-27 01:54:56,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:56,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312258279] [2020-10-27 01:54:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:56,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:56,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2676 [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:54:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:01,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:01,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:01,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:01,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:01,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:01,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:55:01,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:01,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:01,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:01,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:01,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:55:01,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312258279] [2020-10-27 01:55:01,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:01,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 01:55:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660830120] [2020-10-27 01:55:01,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 01:55:01,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 01:55:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:55:01,898 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 61 states.