/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:28:52,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:28:52,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:28:52,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:28:52,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:28:52,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:28:52,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:28:52,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:28:52,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:28:52,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:28:52,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:28:52,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:28:52,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:28:52,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:28:52,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:28:52,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:28:52,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:28:52,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:28:52,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:28:52,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:28:52,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:28:52,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:28:52,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:28:52,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:28:52,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:28:52,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:28:52,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:28:52,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:28:52,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:28:52,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:28:52,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:28:52,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:28:52,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:28:52,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:28:52,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:28:52,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:28:52,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:28:52,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:28:52,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:28:52,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:28:52,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:28:52,762 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 01:28:52,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:28:52,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:28:52,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:28:52,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:28:52,826 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:28:52,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:28:52,827 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:28:52,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:28:52,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:28:52,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:28:52,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:28:52,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:28:52,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:28:52,829 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:28:52,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:28:52,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:28:52,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:28:52,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:28:52,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:28:52,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:28:52,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:28:52,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:28:52,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:28:52,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:28:52,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:28:52,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:28:52,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:28:52,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:28:52,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:28:52,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:28:53,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:28:53,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:28:53,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:28:53,336 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:28:53,337 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:28:53,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-27 01:28:53,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0941d4769/ebab2fe0650b47c0b0ccb88eb6b3d5a8/FLAG04bf077ac [2020-10-27 01:28:54,075 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:28:54,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-27 01:28:54,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0941d4769/ebab2fe0650b47c0b0ccb88eb6b3d5a8/FLAG04bf077ac [2020-10-27 01:28:54,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0941d4769/ebab2fe0650b47c0b0ccb88eb6b3d5a8 [2020-10-27 01:28:54,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:28:54,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:28:54,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:54,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:28:54,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:28:54,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd5e630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54, skipping insertion in model container [2020-10-27 01:28:54,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:28:54,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:28:54,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:54,633 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:28:54,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:54,672 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:28:54,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54 WrapperNode [2020-10-27 01:28:54,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:54,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:28:54,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:28:54,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:28:54,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (1/1) ... [2020-10-27 01:28:54,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:28:54,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:28:54,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:28:54,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:28:54,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (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 01:28:54,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:28:54,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:28:54,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:28:54,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:28:54,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:28:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:28:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:28:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:28:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:28:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:28:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:28:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:28:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:28:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:28:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:28:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:28:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:28:55,356 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:28:55,357 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:28:55,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:55 BoogieIcfgContainer [2020-10-27 01:28:55,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:28:55,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:28:55,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:28:55,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:28:55,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:28:54" (1/3) ... [2020-10-27 01:28:55,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3818d4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:55, skipping insertion in model container [2020-10-27 01:28:55,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:54" (2/3) ... [2020-10-27 01:28:55,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3818d4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:55, skipping insertion in model container [2020-10-27 01:28:55,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:55" (3/3) ... [2020-10-27 01:28:55,375 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-10-27 01:28:55,391 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:28:55,397 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:28:55,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:28:55,460 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:28:55,460 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:28:55,460 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:28:55,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:28:55,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:28:55,461 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:28:55,461 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:28:55,461 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:28:55,488 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:28:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:28:55,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:55,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:55,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 665310781, now seen corresponding path program 1 times [2020-10-27 01:28:55,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:55,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815255680] [2020-10-27 01:28:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:55,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:55,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:55,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:28:55,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:55,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 01:28:55,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:28:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:55,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:28:56,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:56,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:28:56,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:56,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:56,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:56,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,112 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 01:28:56,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815255680] [2020-10-27 01:28:56,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:56,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:28:56,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405547819] [2020-10-27 01:28:56,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:28:56,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:28:56,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:28:56,142 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 01:28:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:56,241 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-27 01:28:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:28:56,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 01:28:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:56,252 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:28:56,253 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:28:56,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:28:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:28:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:28:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:28:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:28:56,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:28:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:56,306 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:28:56,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:28:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:28:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:28:56,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:56,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:56,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:28:56,308 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash -364744009, now seen corresponding path program 1 times [2020-10-27 01:28:56,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:56,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302161027] [2020-10-27 01:28:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:28:56,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 01:28:56,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:56,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:28:56,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:28:56,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:56,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:28:56,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:56,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:56,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:56,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,537 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 01:28:56,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302161027] [2020-10-27 01:28:56,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:56,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214957466] [2020-10-27 01:28:56,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:56,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:56,545 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-27 01:28:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:56,610 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:28:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:56,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 01:28:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:56,613 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:28:56,613 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:28:56,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:28:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-27 01:28:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:28:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:28:56,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-27 01:28:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:56,623 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:28:56,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:28:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:28:56,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:56,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:56,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:28:56,625 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:56,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1375402741, now seen corresponding path program 1 times [2020-10-27 01:28:56,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:56,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933471592] [2020-10-27 01:28:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:28:56,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:56,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 01:28:56,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:28:56,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:28:56,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:28:56,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:57,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:57,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:57,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:57,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:57,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:57,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:28:57,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:57,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:57,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933471592] [2020-10-27 01:28:57,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:28:57,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:28:57,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557208444] [2020-10-27 01:28:57,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:28:57,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:28:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:57,157 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-27 01:28:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:57,267 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 01:28:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:28:57,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 01:28:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:57,270 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:28:57,270 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:28:57,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:28:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 01:28:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:28:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:28:57,278 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-27 01:28:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:57,278 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:28:57,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:28:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:28:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:28:57,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:57,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:57,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:28:57,280 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1380815949, now seen corresponding path program 2 times [2020-10-27 01:28:57,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:57,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595948635] [2020-10-27 01:28:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:57,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:57,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:57,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:57,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:28:57,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:57,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-27 01:28:57,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:57,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:28:57,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:28:57,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:28:57,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:57,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:57,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:57,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:57,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:57,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:57,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:28:57,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:57,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:57,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595948635] [2020-10-27 01:28:57,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:28:57,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:28:57,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137624338] [2020-10-27 01:28:57,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:28:57,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:28:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:28:57,733 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-27 01:28:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:57,818 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 01:28:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:28:57,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:28:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:57,820 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:28:57,820 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:28:57,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:28:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:28:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 01:28:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:28:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 01:28:57,827 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-27 01:28:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:57,827 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 01:28:57,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:28:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 01:28:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:28:57,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:57,828 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:57,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:28:57,829 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash -112155407, now seen corresponding path program 3 times [2020-10-27 01:28:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:57,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033679064] [2020-10-27 01:28:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:57,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:57,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:58,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:58,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:28:58,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:58,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-27 01:28:58,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:28:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:28:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:28:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:58,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:58,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:58,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:58,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:58,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:58,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:58,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:58,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:58,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:58,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:58,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033679064] [2020-10-27 01:28:58,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:28:58,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:28:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055415664] [2020-10-27 01:28:58,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:28:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:28:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:28:58,570 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-10-27 01:28:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:58,650 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 01:28:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:28:58,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 01:28:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:58,652 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:28:58,653 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:28:58,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:28:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:28:58,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 01:28:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:28:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 01:28:58,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-27 01:28:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:58,659 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 01:28:58,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:28:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 01:28:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:28:58,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:58,661 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:58,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:28:58,661 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -700086609, now seen corresponding path program 4 times [2020-10-27 01:28:58,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:58,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942759063] [2020-10-27 01:28:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:58,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:58,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:59,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:59,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:28:59,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:59,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-27 01:28:59,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:28:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:28:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:59,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:59,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:59,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:59,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:59,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:59,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:59,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:59,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:59,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:59,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:59,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:59,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942759063] [2020-10-27 01:28:59,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:28:59,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:28:59,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803299396] [2020-10-27 01:28:59,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:28:59,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:59,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:28:59,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:28:59,359 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-10-27 01:28:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:59,489 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 01:28:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:28:59,490 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:28:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:59,491 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:28:59,491 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:28:59,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:28:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:28:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 01:28:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:28:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 01:28:59,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-27 01:28:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:59,499 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 01:28:59,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:28:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 01:28:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:28:59,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:59,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:59,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:28:59,500 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1233711341, now seen corresponding path program 5 times [2020-10-27 01:28:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:59,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494555625] [2020-10-27 01:28:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:59,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:59,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:00,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:00,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:29:00,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:00,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-27 01:29:00,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:29:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:29:00,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:00,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:00,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:00,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:00,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:00,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:00,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:00,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:00,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:00,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494555625] [2020-10-27 01:29:00,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:00,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:29:00,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969392467] [2020-10-27 01:29:00,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:29:00,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:00,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:29:00,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:29:00,595 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-27 01:29:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:00,705 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 01:29:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:29:00,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:29:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:00,707 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:29:00,707 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:29:00,710 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 01:29:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:29:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 01:29:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:29:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 01:29:00,721 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-27 01:29:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:00,722 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 01:29:00,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:29:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 01:29:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:29:00,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:00,725 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:00,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:29:00,725 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:00,726 INFO L82 PathProgramCache]: Analyzing trace with hash -107297877, now seen corresponding path program 6 times [2020-10-27 01:29:00,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:00,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431526844] [2020-10-27 01:29:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:00,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:01,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:01,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:29:01,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:01,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-27 01:29:01,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:29:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:29:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:01,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:01,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:01,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:01,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:01,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:29:01,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:01,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:01,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431526844] [2020-10-27 01:29:01,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:01,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:29:01,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773081561] [2020-10-27 01:29:01,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:29:01,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:29:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:29:01,819 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-10-27 01:29:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:01,991 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 01:29:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:29:01,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:29:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:01,993 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:29:01,993 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:29:01,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:29:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:29:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 01:29:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:29:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 01:29:02,008 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-27 01:29:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:02,009 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 01:29:02,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:29:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 01:29:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:29:02,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:02,014 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:02,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:29:02,014 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash -326967575, now seen corresponding path program 7 times [2020-10-27 01:29:02,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:02,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111996281] [2020-10-27 01:29:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:02,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:02,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:02,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:29:02,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:02,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-27 01:29:02,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:29:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:02,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:03,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:03,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:03,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:03,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:03,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:03,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:03,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:03,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:03,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111996281] [2020-10-27 01:29:03,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:03,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:29:03,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147513450] [2020-10-27 01:29:03,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:29:03,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:03,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:29:03,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:29:03,138 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-10-27 01:29:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:03,270 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:29:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:29:03,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:29:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:03,272 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:29:03,272 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:29:03,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:29:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:29:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:29:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:29:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 01:29:03,278 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-27 01:29:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:03,279 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 01:29:03,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:29:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 01:29:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:29:03,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:03,280 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:03,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:29:03,280 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash -976149849, now seen corresponding path program 8 times [2020-10-27 01:29:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:03,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296335539] [2020-10-27 01:29:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:03,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:03,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:04,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:04,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:29:04,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:04,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-27 01:29:04,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:29:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:29:04,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:04,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:04,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:04,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:04,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:04,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:04,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:04,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:04,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:04,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:04,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:04,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:04,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296335539] [2020-10-27 01:29:04,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:04,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:29:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062028303] [2020-10-27 01:29:04,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:29:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:29:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:29:04,688 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 12 states. [2020-10-27 01:29:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:04,852 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:29:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:29:04,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:29:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:04,854 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:29:04,854 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:29:04,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:29:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:29:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 01:29:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:29:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 01:29:04,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-27 01:29:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:04,867 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 01:29:04,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:29:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 01:29:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:29:04,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:04,871 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:04,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:29:04,871 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2070057243, now seen corresponding path program 9 times [2020-10-27 01:29:04,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:04,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625830905] [2020-10-27 01:29:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:04,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:04,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:06,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:06,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:29:06,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:06,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-27 01:29:06,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:06,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:29:06,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:06,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:29:06,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:06,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:06,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:06,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:06,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:06,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:06,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:06,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:06,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:06,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625830905] [2020-10-27 01:29:06,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:06,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:29:06,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500623898] [2020-10-27 01:29:06,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:29:06,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:06,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:29:06,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:29:06,349 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-10-27 01:29:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:06,503 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 01:29:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:29:06,504 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:29:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:06,505 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:29:06,506 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:29:06,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:29:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:29:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 01:29:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:29:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 01:29:06,516 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-27 01:29:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:06,516 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 01:29:06,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:29:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 01:29:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:29:06,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:06,517 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:06,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:29:06,518 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1048075357, now seen corresponding path program 10 times [2020-10-27 01:29:06,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:06,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931187927] [2020-10-27 01:29:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:06,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:06,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:07,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:07,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:29:07,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:07,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1215 [2020-10-27 01:29:07,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:07,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:29:07,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:07,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:29:07,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:08,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:08,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:08,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:08,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:08,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:08,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:08,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:08,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:08,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:08,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:08,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931187927] [2020-10-27 01:29:08,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:08,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:29:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085182087] [2020-10-27 01:29:08,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:29:08,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:08,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:29:08,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:29:08,059 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 14 states. [2020-10-27 01:29:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:08,256 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 01:29:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:29:08,257 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 01:29:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:08,258 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:29:08,258 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:29:08,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:29:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:29:08,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 01:29:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:29:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 01:29:08,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-27 01:29:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:08,269 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 01:29:08,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:29:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 01:29:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:29:08,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:08,272 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:08,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:29:08,272 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1823973601, now seen corresponding path program 11 times [2020-10-27 01:29:08,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:08,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138543179] [2020-10-27 01:29:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:08,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:09,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:09,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:29:09,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:09,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-27 01:29:09,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:29:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:29:09,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:09,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:09,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:09,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:09,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:09,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:29:09,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:09,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138543179] [2020-10-27 01:29:09,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:09,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:29:09,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617099387] [2020-10-27 01:29:09,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:29:09,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:29:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:29:09,668 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-10-27 01:29:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:09,806 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:29:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:29:09,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 01:29:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:09,808 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:29:09,808 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:29:09,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:29:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:29:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 01:29:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:29:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 01:29:09,818 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-27 01:29:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:09,819 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 01:29:09,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:29:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 01:29:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:29:09,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:09,822 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:09,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:29:09,823 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash 199050911, now seen corresponding path program 12 times [2020-10-27 01:29:09,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:09,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991026009] [2020-10-27 01:29:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:09,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:11,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:11,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:29:11,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:11,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-27 01:29:11,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:11,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:29:11,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:29:11,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:11,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:11,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:11,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:11,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:11,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:11,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:11,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:11,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:11,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991026009] [2020-10-27 01:29:11,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:11,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:29:11,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985522754] [2020-10-27 01:29:11,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:29:11,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:11,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:29:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:29:11,391 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 16 states. [2020-10-27 01:29:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:11,485 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 01:29:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:29:11,486 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 01:29:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:11,487 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:29:11,487 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:29:11,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:29:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:29:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 01:29:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:29:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 01:29:11,498 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-27 01:29:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:11,499 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 01:29:11,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:29:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 01:29:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:29:11,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:11,506 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:11,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:29:11,507 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:11,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2016441565, now seen corresponding path program 13 times [2020-10-27 01:29:11,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:11,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789472885] [2020-10-27 01:29:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:11,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:12,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:12,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:29:12,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:12,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1345 [2020-10-27 01:29:12,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:29:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:29:12,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:13,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:13,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:13,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:13,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:13,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:13,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:13,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:13,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:13,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:13,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:13,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:13,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789472885] [2020-10-27 01:29:13,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:13,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:29:13,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136628308] [2020-10-27 01:29:13,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:29:13,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:29:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:29:13,119 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-10-27 01:29:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:13,333 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 01:29:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:29:13,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-27 01:29:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:13,334 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:29:13,335 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:29:13,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:29:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:29:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 01:29:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:29:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 01:29:13,341 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-27 01:29:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:13,341 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 01:29:13,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:29:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 01:29:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:29:13,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:13,342 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:13,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:29:13,343 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:13,343 INFO L82 PathProgramCache]: Analyzing trace with hash 477170587, now seen corresponding path program 14 times [2020-10-27 01:29:13,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:13,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740160293] [2020-10-27 01:29:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:13,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:13,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:14,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:14,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:29:14,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-10-27 01:29:14,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:29:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:29:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:14,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:14,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:14,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:14,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:14,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:14,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:14,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:14,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:14,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:14,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:14,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740160293] [2020-10-27 01:29:14,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:14,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:29:14,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859717662] [2020-10-27 01:29:14,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:29:14,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:14,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:29:14,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:29:14,530 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-10-27 01:29:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:14,620 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 01:29:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:29:14,620 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-27 01:29:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:14,621 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:29:14,621 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:29:14,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:29:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:29:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 01:29:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:29:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 01:29:14,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-27 01:29:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:14,628 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 01:29:14,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:29:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 01:29:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:29:14,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:14,629 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:14,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:29:14,629 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1293489447, now seen corresponding path program 15 times [2020-10-27 01:29:14,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:14,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872202381] [2020-10-27 01:29:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:14,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:14,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:15,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:15,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:29:15,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:15,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-27 01:29:15,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:29:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:29:15,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:15,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:15,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:15,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:15,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872202381] [2020-10-27 01:29:15,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:15,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:29:15,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690591442] [2020-10-27 01:29:15,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:29:15,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:29:16,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:29:16,000 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-10-27 01:29:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:16,132 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 01:29:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:29:16,136 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-27 01:29:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:16,137 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:29:16,137 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:29:16,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:29:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:29:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:29:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:29:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 01:29:16,144 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-27 01:29:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:16,144 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 01:29:16,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:29:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 01:29:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:29:16,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:16,145 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:16,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:29:16,146 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:16,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2090732905, now seen corresponding path program 16 times [2020-10-27 01:29:16,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:16,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279404341] [2020-10-27 01:29:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:16,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:17,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:17,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:29:17,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:17,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1169 [2020-10-27 01:29:17,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:17,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:29:17,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:17,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:29:17,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:17,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:17,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:17,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:17,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:17,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279404341] [2020-10-27 01:29:17,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:17,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:29:17,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994564176] [2020-10-27 01:29:17,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:29:17,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:17,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:29:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:29:17,629 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 20 states. [2020-10-27 01:29:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:17,807 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 01:29:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:29:17,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-27 01:29:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:17,809 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:29:17,809 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:29:17,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:29:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:29:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 01:29:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:29:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 01:29:17,823 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-27 01:29:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:17,823 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 01:29:17,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:29:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 01:29:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:29:17,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:17,825 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:17,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:29:17,826 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:17,826 INFO L82 PathProgramCache]: Analyzing trace with hash 557449941, now seen corresponding path program 17 times [2020-10-27 01:29:17,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:17,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127381569] [2020-10-27 01:29:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:19,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:19,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:29:19,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1840 [2020-10-27 01:29:19,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:29:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:29:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:20,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:20,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:20,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:20,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:20,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:20,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:20,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:20,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:20,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127381569] [2020-10-27 01:29:20,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:20,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:29:20,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490602267] [2020-10-27 01:29:20,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:29:20,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:29:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:29:20,081 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-10-27 01:29:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:20,234 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 01:29:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:29:20,235 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-27 01:29:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:20,235 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:29:20,236 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:29:20,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:29:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:29:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 01:29:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:29:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 01:29:20,246 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-27 01:29:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:20,247 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 01:29:20,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:29:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 01:29:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:29:20,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:20,248 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:20,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:29:20,248 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1454441581, now seen corresponding path program 18 times [2020-10-27 01:29:20,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:20,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62927788] [2020-10-27 01:29:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:20,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:21,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:21,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:29:21,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:21,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1357 [2020-10-27 01:29:21,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:29:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:29:21,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:22,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:22,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:22,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:22,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:22,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:22,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:22,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62927788] [2020-10-27 01:29:22,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:22,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:29:22,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682548092] [2020-10-27 01:29:22,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:29:22,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:29:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:29:22,080 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 22 states. [2020-10-27 01:29:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:22,254 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 01:29:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:29:22,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-27 01:29:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:22,255 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:29:22,256 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:29:22,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:29:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:29:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 01:29:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:29:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 01:29:22,269 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-27 01:29:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:22,270 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 01:29:22,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:29:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 01:29:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:29:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:22,271 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:22,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:29:22,271 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2146911023, now seen corresponding path program 19 times [2020-10-27 01:29:22,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:22,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716833002] [2020-10-27 01:29:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:22,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:29:23,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:23,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:23,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:23,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:23,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:23,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:24,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716833002] [2020-10-27 01:29:24,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:24,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:29:24,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526226917] [2020-10-27 01:29:24,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:29:24,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:24,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:29:24,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:29:24,014 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-10-27 01:29:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:24,238 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 01:29:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:29:24,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-27 01:29:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:24,239 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:29:24,240 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:29:24,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:29:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:29:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 01:29:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:29:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 01:29:24,251 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-27 01:29:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:24,251 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 01:29:24,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:29:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 01:29:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:29:24,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:24,252 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:24,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:29:24,252 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1890113905, now seen corresponding path program 20 times [2020-10-27 01:29:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:24,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224468504] [2020-10-27 01:29:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1231 [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:29:25,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:25,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:25,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:25,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:25,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:25,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:25,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:25,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:25,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:25,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:25,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224468504] [2020-10-27 01:29:26,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:26,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:29:26,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789493491] [2020-10-27 01:29:26,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:29:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:26,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:29:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:29:26,009 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 24 states. [2020-10-27 01:29:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:26,196 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 01:29:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:29:26,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-27 01:29:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:26,202 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:29:26,203 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:29:26,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:29:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:29:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 01:29:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:29:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 01:29:26,217 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-27 01:29:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:26,218 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 01:29:26,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:29:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 01:29:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:29:26,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:26,219 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:26,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:29:26,222 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:26,223 INFO L82 PathProgramCache]: Analyzing trace with hash 78780621, now seen corresponding path program 21 times [2020-10-27 01:29:26,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:26,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154220088] [2020-10-27 01:29:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:26,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:28,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:28,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:29:28,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:28,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2569 [2020-10-27 01:29:28,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:28,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:29:28,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:28,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:29:28,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:29,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:29,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:29,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:29,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:29,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:29,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:29,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:29,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154220088] [2020-10-27 01:29:29,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:29,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:29:29,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532153173] [2020-10-27 01:29:29,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:29:29,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:29,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:29:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:29:29,310 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-10-27 01:29:29,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:29,514 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 01:29:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:29:29,515 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-27 01:29:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:29,515 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:29:29,515 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:29:29,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:29:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:29:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 01:29:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:29:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 01:29:29,521 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-27 01:29:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:29,521 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 01:29:29,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:29:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 01:29:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:29:29,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:29,522 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:29,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:29:29,523 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1894157429, now seen corresponding path program 22 times [2020-10-27 01:29:29,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:29,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041805881] [2020-10-27 01:29:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:29,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:29,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:31,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:31,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:29:31,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:31,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2083 [2020-10-27 01:29:31,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:29:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:29:31,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:32,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:32,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:32,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:32,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:32,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:32,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:32,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:32,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:32,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041805881] [2020-10-27 01:29:32,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:32,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:29:32,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057289392] [2020-10-27 01:29:32,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:29:32,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:32,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:29:32,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:29:32,140 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 26 states. [2020-10-27 01:29:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:32,332 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 01:29:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:29:32,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-27 01:29:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:32,333 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:29:32,334 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:29:32,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:29:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:29:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 01:29:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:29:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 01:29:32,339 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-27 01:29:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:32,339 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 01:29:32,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:29:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 01:29:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:29:32,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:32,344 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:32,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:29:32,345 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:32,347 INFO L82 PathProgramCache]: Analyzing trace with hash 487921353, now seen corresponding path program 23 times [2020-10-27 01:29:32,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:32,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858290885] [2020-10-27 01:29:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:32,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:32,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:33,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:33,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:29:33,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:33,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-27 01:29:33,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:29:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:29:33,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:34,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:34,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:34,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:34,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:34,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858290885] [2020-10-27 01:29:34,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:34,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:29:34,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264552530] [2020-10-27 01:29:34,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:29:34,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:34,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:29:34,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:29:34,172 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-10-27 01:29:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:34,362 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 01:29:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:29:34,363 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-27 01:29:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:34,363 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:29:34,364 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:29:34,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:29:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:29:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 01:29:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:29:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 01:29:34,372 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-27 01:29:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:34,372 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 01:29:34,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:29:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 01:29:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:29:34,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:34,373 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:34,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:29:34,373 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash 448062087, now seen corresponding path program 24 times [2020-10-27 01:29:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:34,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988192242] [2020-10-27 01:29:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:34,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:35,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:35,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:29:35,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:35,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1504 [2020-10-27 01:29:35,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:29:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:29:35,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:36,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:36,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:36,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:36,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988192242] [2020-10-27 01:29:36,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:36,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:29:36,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025211235] [2020-10-27 01:29:36,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:29:36,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:29:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:29:36,496 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 28 states. [2020-10-27 01:29:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:36,720 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-27 01:29:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:29:36,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-27 01:29:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:36,721 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:29:36,721 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:29:36,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:29:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:29:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 01:29:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:29:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-27 01:29:36,727 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-27 01:29:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:36,728 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-27 01:29:36,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:29:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-27 01:29:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:29:36,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:36,729 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:36,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:29:36,729 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash 798013125, now seen corresponding path program 25 times [2020-10-27 01:29:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:36,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595297419] [2020-10-27 01:29:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:36,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:38,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:38,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:29:38,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:38,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-27 01:29:38,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:38,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:38,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:38,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:38,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:38,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:38,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:38,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:38,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:38,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:38,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:38,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:38,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595297419] [2020-10-27 01:29:38,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:38,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:29:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606562237] [2020-10-27 01:29:38,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:29:38,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:38,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:29:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:29:38,889 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-10-27 01:29:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:39,132 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-27 01:29:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:29:39,132 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-27 01:29:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:39,133 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:29:39,133 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:29:39,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:29:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:29:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 01:29:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:29:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-27 01:29:39,139 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-27 01:29:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:39,140 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-27 01:29:39,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:29:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-27 01:29:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:29:39,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:39,140 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:39,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:29:39,141 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:39,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2093511555, now seen corresponding path program 26 times [2020-10-27 01:29:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:39,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625619526] [2020-10-27 01:29:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:39,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:29:40,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:41,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:41,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:41,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:41,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:41,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:41,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:41,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:41,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625619526] [2020-10-27 01:29:41,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:41,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:29:41,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165561446] [2020-10-27 01:29:41,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:29:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:29:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:29:41,213 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 30 states. [2020-10-27 01:29:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:41,460 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-27 01:29:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:29:41,461 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-27 01:29:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:41,462 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:29:41,462 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:29:41,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:29:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:29:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-27 01:29:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:29:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-27 01:29:41,467 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-27 01:29:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:41,467 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-27 01:29:41,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:29:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-27 01:29:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:29:41,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:41,468 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:41,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:29:41,469 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1526986945, now seen corresponding path program 27 times [2020-10-27 01:29:41,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:41,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479675537] [2020-10-27 01:29:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:41,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:41,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:43,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:43,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:29:43,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1645 [2020-10-27 01:29:43,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:29:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:29:43,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:43,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:43,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:43,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:43,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:43,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479675537] [2020-10-27 01:29:43,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:43,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:29:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474229801] [2020-10-27 01:29:43,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:29:43,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:29:43,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:29:43,842 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-10-27 01:29:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:44,094 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-27 01:29:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:29:44,095 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-27 01:29:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:44,096 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:29:44,096 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:29:44,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:29:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:29:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 01:29:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:29:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-27 01:29:44,102 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-27 01:29:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:44,102 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-27 01:29:44,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:29:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-27 01:29:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:29:44,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:44,103 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:44,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:29:44,104 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1737283969, now seen corresponding path program 28 times [2020-10-27 01:29:44,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:44,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601229235] [2020-10-27 01:29:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:44,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:44,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:45,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1759 [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:29:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:46,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:46,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:46,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:46,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:46,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:46,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:46,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601229235] [2020-10-27 01:29:46,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:46,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:29:46,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420244692] [2020-10-27 01:29:46,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:29:46,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:29:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:29:46,635 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 32 states. [2020-10-27 01:29:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:46,912 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-27 01:29:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:29:46,913 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-27 01:29:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:46,914 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:29:46,914 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:29:46,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:29:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:29:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 01:29:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:29:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-27 01:29:46,925 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-27 01:29:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:46,925 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-27 01:29:46,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:29:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-27 01:29:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:29:46,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:46,927 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:46,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:29:46,927 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash 919461053, now seen corresponding path program 29 times [2020-10-27 01:29:46,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:46,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353517168] [2020-10-27 01:29:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:46,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:48,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1712 [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:29:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:49,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:49,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:49,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:49,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:49,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:49,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:49,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:49,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:49,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:49,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:49,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:49,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353517168] [2020-10-27 01:29:49,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:49,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:29:49,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679641848] [2020-10-27 01:29:49,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:29:49,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:29:49,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:29:49,484 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-10-27 01:29:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:49,731 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-27 01:29:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:29:49,732 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-27 01:29:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:49,733 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:29:49,733 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:29:49,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:29:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:29:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 01:29:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:29:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-27 01:29:49,739 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-27 01:29:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:49,740 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-27 01:29:49,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:29:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-27 01:29:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:29:49,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:49,741 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:49,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:29:49,741 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:49,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1454113925, now seen corresponding path program 30 times [2020-10-27 01:29:49,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:49,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197394087] [2020-10-27 01:29:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:49,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:51,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:51,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:29:51,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2205 [2020-10-27 01:29:51,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:29:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:29:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:52,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:52,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:52,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:52,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:52,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:52,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:52,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:52,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:52,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197394087] [2020-10-27 01:29:52,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:52,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:29:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819799408] [2020-10-27 01:29:52,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:29:52,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:29:52,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:29:52,816 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 34 states. [2020-10-27 01:29:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:52,987 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-27 01:29:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:29:52,988 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-27 01:29:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:52,989 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:29:52,989 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:29:52,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:29:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:29:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 01:29:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:29:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-27 01:29:52,995 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-27 01:29:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:52,995 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-27 01:29:52,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:29:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-27 01:29:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:29:52,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:52,996 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:52,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:29:52,997 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1832033607, now seen corresponding path program 31 times [2020-10-27 01:29:52,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:52,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480913623] [2020-10-27 01:29:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:53,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:53,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:54,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:54,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:29:54,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:54,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1834 [2020-10-27 01:29:54,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:29:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:29:54,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:55,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:55,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:55,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:55,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:55,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480913623] [2020-10-27 01:29:55,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:55,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:29:55,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255213152] [2020-10-27 01:29:55,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:29:55,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:29:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:29:55,736 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-10-27 01:29:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:56,058 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-27 01:29:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:29:56,059 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-10-27 01:29:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:56,060 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:29:56,060 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:29:56,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:29:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:29:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 01:29:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:29:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-27 01:29:56,070 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-27 01:29:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:56,070 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-27 01:29:56,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:29:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-27 01:29:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:29:56,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:56,072 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:56,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:29:56,072 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 59372151, now seen corresponding path program 32 times [2020-10-27 01:29:56,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:56,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805232213] [2020-10-27 01:29:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:56,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:29:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:59,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:59,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:59,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:59,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:59,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:59,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:59,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:59,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:59,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805232213] [2020-10-27 01:29:59,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:59,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:29:59,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034555929] [2020-10-27 01:29:59,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:29:59,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:59,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:29:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:29:59,241 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 36 states. [2020-10-27 01:29:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:59,433 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-27 01:29:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:29:59,434 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 77 [2020-10-27 01:29:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:59,435 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:29:59,435 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:29:59,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:29:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:29:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 01:29:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:29:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-27 01:29:59,440 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-27 01:29:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:59,441 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-27 01:29:59,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:29:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-27 01:29:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 01:29:59,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:59,442 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:59,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:29:59,442 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:59,443 INFO L82 PathProgramCache]: Analyzing trace with hash 929139381, now seen corresponding path program 33 times [2020-10-27 01:29:59,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:59,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742191437] [2020-10-27 01:29:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:59,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:59,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:01,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:01,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 01:30:01,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:01,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2167 [2020-10-27 01:30:01,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:30:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:30:01,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:02,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:02,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:02,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:02,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:02,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:02,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:02,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:02,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:02,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:02,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:02,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742191437] [2020-10-27 01:30:02,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:02,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:30:02,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697386219] [2020-10-27 01:30:02,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:30:02,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:30:02,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:30:02,633 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-10-27 01:30:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:02,968 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-27 01:30:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:30:02,969 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-10-27 01:30:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:02,970 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:30:02,970 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:30:02,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:30:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:30:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 01:30:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:30:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-27 01:30:02,977 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-27 01:30:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:02,977 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-27 01:30:02,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:30:02,978 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-27 01:30:02,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:30:02,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:02,979 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:02,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:30:02,979 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:02,980 INFO L82 PathProgramCache]: Analyzing trace with hash -743175309, now seen corresponding path program 34 times [2020-10-27 01:30:02,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:02,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485611687] [2020-10-27 01:30:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:03,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:03,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:05,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2345 [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:30:05,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:06,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:06,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:06,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:06,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:06,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:06,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:06,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:06,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485611687] [2020-10-27 01:30:06,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:06,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:30:06,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714153994] [2020-10-27 01:30:06,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:30:06,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:06,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:30:06,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:30:06,401 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 38 states. [2020-10-27 01:30:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:06,696 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-27 01:30:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:30:06,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 81 [2020-10-27 01:30:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:06,698 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:30:06,698 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:30:06,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:30:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:30:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 01:30:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:30:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-27 01:30:06,704 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-27 01:30:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:06,705 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-27 01:30:06,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:30:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-27 01:30:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 01:30:06,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:06,706 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:06,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:30:06,706 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1519823695, now seen corresponding path program 35 times [2020-10-27 01:30:06,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:06,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896052121] [2020-10-27 01:30:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:06,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:09,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2395 [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:30:09,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:10,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:10,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:10,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:10,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896052121] [2020-10-27 01:30:10,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:10,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:30:10,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93646493] [2020-10-27 01:30:10,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:30:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:30:10,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:30:10,243 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-10-27 01:30:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:10,500 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-27 01:30:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:30:10,501 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-10-27 01:30:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:10,502 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:30:10,502 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:30:10,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:30:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:30:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 01:30:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:30:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-27 01:30:10,509 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-27 01:30:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:10,509 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-27 01:30:10,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:30:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-27 01:30:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 01:30:10,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:10,510 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:10,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:30:10,511 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:10,511 INFO L82 PathProgramCache]: Analyzing trace with hash -554613137, now seen corresponding path program 36 times [2020-10-27 01:30:10,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:10,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357539878] [2020-10-27 01:30:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:10,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:10,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:13,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:13,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 01:30:13,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:13,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2615 [2020-10-27 01:30:13,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:30:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:13,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:30:13,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:14,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:14,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:14,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:14,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:14,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:14,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:14,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:14,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:14,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:14,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:14,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357539878] [2020-10-27 01:30:14,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:14,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:30:14,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2554576] [2020-10-27 01:30:14,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:30:14,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:30:14,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:30:14,280 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 40 states. [2020-10-27 01:30:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:14,528 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-27 01:30:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:30:14,529 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 85 [2020-10-27 01:30:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:14,530 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:30:14,530 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:30:14,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:30:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:30:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 01:30:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:30:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-27 01:30:14,538 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-27 01:30:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:14,538 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-27 01:30:14,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:30:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-27 01:30:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 01:30:14,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:14,539 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:14,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:30:14,539 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash -700202835, now seen corresponding path program 37 times [2020-10-27 01:30:14,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:14,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676288266] [2020-10-27 01:30:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:14,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:17,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:17,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:30:17,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:17,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2782 [2020-10-27 01:30:17,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:30:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:30:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:18,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:18,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:18,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:18,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:18,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:18,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:18,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:18,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:18,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676288266] [2020-10-27 01:30:18,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:18,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:30:18,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294174274] [2020-10-27 01:30:18,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:30:18,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:30:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:30:18,549 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-10-27 01:30:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:18,800 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-27 01:30:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:30:18,801 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-10-27 01:30:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:18,802 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:30:18,802 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:30:18,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:30:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:30:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 01:30:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:30:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-10-27 01:30:18,811 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2020-10-27 01:30:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:18,811 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-10-27 01:30:18,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:30:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-10-27 01:30:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 01:30:18,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:18,812 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:18,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:30:18,813 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1122018155, now seen corresponding path program 38 times [2020-10-27 01:30:18,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:18,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121515089] [2020-10-27 01:30:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:18,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:21,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:21,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 01:30:21,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:21,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-27 01:30:21,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:30:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:30:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:23,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:23,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:23,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:23,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:23,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:23,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:23,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:23,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:23,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121515089] [2020-10-27 01:30:23,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:23,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:30:23,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755153881] [2020-10-27 01:30:23,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:30:23,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:23,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:30:23,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:30:23,077 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 42 states. [2020-10-27 01:30:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:23,394 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-27 01:30:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:30:23,394 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 89 [2020-10-27 01:30:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:23,396 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:30:23,396 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:30:23,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:30:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:30:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-27 01:30:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:30:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-27 01:30:23,403 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2020-10-27 01:30:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:23,403 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-27 01:30:23,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:30:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-27 01:30:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 01:30:23,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:23,404 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:23,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:30:23,405 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:23,405 INFO L82 PathProgramCache]: Analyzing trace with hash -70267223, now seen corresponding path program 39 times [2020-10-27 01:30:23,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:23,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687240304] [2020-10-27 01:30:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:23,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:26,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:26,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 01:30:26,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:26,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2994 [2020-10-27 01:30:26,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:30:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:30:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:27,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687240304] [2020-10-27 01:30:27,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:27,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:30:27,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620404695] [2020-10-27 01:30:27,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:30:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:30:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:30:27,785 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-10-27 01:30:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:28,149 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-27 01:30:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:30:28,150 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-10-27 01:30:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:28,151 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:30:28,152 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:30:28,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:30:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:30:28,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 01:30:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:30:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-27 01:30:28,160 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-27 01:30:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:28,160 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-27 01:30:28,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:30:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-27 01:30:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:30:28,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:28,161 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:28,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:30:28,162 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash 899752551, now seen corresponding path program 40 times [2020-10-27 01:30:28,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:28,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742654672] [2020-10-27 01:30:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:31,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:31,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:30:31,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:31,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3163 [2020-10-27 01:30:31,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:31,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:30:31,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:31,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:30:31,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:32,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:32,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:32,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:32,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:32,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:32,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:32,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:32,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:32,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742654672] [2020-10-27 01:30:32,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:32,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:30:32,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737738939] [2020-10-27 01:30:32,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:30:32,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:32,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:30:32,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:30:32,782 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 44 states. [2020-10-27 01:30:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:33,035 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-27 01:30:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:30:33,035 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 93 [2020-10-27 01:30:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:33,037 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:30:33,037 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:30:33,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:30:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:30:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 01:30:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:30:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-27 01:30:33,043 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-27 01:30:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:33,044 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-27 01:30:33,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:30:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-27 01:30:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 01:30:33,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:33,045 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:33,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:30:33,045 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1080852133, now seen corresponding path program 41 times [2020-10-27 01:30:33,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:33,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59802676] [2020-10-27 01:30:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:33,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:36,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:36,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 01:30:36,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3398 [2020-10-27 01:30:36,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:30:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:30:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:37,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:37,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:37,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:37,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:37,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:37,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:37,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:37,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:37,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:37,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:37,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:37,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59802676] [2020-10-27 01:30:37,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:37,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:30:37,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591376985] [2020-10-27 01:30:37,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:30:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:30:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:30:37,965 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-10-27 01:30:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:38,348 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-27 01:30:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:30:38,349 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-10-27 01:30:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:38,351 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:30:38,351 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:30:38,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:30:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:30:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 01:30:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 01:30:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-27 01:30:38,357 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-27 01:30:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:38,358 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-27 01:30:38,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:30:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-27 01:30:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 01:30:38,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:38,359 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:38,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:30:38,359 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -976108701, now seen corresponding path program 42 times [2020-10-27 01:30:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:38,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766380762] [2020-10-27 01:30:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:38,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:38,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:41,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3466 [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:30:41,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:43,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:43,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:43,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:43,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:43,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:43,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:43,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:43,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766380762] [2020-10-27 01:30:43,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:43,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:30:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568306526] [2020-10-27 01:30:43,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:30:43,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:30:43,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:30:43,416 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 46 states. [2020-10-27 01:30:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:43,696 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-27 01:30:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:30:43,696 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 97 [2020-10-27 01:30:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:43,698 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:30:43,698 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:30:43,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:30:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:30:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 01:30:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:30:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-27 01:30:43,704 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-27 01:30:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:43,704 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-27 01:30:43,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:30:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-27 01:30:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:30:43,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:43,705 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:43,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:30:43,705 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:43,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2030514015, now seen corresponding path program 43 times [2020-10-27 01:30:43,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:43,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261352397] [2020-10-27 01:30:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:43,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:44,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:47,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3706 [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 01:30:47,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:49,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:49,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:49,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:49,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:49,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:49,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:49,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:49,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:49,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261352397] [2020-10-27 01:30:49,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:49,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:30:49,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36202736] [2020-10-27 01:30:49,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:30:49,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:49,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:30:49,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:30:49,066 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-10-27 01:30:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:49,473 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-27 01:30:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:30:49,473 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-10-27 01:30:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:49,475 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:30:49,475 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:30:49,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:30:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:30:49,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 01:30:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:30:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-10-27 01:30:49,481 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2020-10-27 01:30:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:49,481 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-10-27 01:30:49,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:30:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-10-27 01:30:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 01:30:49,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:49,482 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:49,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:30:49,482 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1701738913, now seen corresponding path program 44 times [2020-10-27 01:30:49,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:49,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861061457] [2020-10-27 01:30:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:50,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:53,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:53,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 01:30:53,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3806 [2020-10-27 01:30:53,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:30:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:30:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:54,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:55,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:55,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:55,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:55,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:55,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:55,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:55,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:55,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:55,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861061457] [2020-10-27 01:30:55,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:55,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:30:55,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320086118] [2020-10-27 01:30:55,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:30:55,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:55,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:30:55,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:30:55,024 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 48 states. [2020-10-27 01:30:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:55,431 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-27 01:30:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:30:55,432 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 101 [2020-10-27 01:30:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:55,434 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:30:55,434 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:30:55,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:30:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:30:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 01:30:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:30:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-27 01:30:55,439 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2020-10-27 01:30:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:55,440 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-27 01:30:55,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:30:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-27 01:30:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 01:30:55,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:55,441 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:55,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:30:55,441 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:55,442 INFO L82 PathProgramCache]: Analyzing trace with hash 718521501, now seen corresponding path program 45 times [2020-10-27 01:30:55,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:55,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136236213] [2020-10-27 01:30:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:55,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:56,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:59,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:59,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 01:30:59,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:59,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4030 [2020-10-27 01:30:59,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:30:59,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:59,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 01:30:59,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:01,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:01,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:01,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:01,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:01,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:01,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:01,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:01,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:01,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:01,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:01,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:01,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136236213] [2020-10-27 01:31:01,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:01,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:31:01,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663957530] [2020-10-27 01:31:01,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:31:01,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:31:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:31:01,377 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 49 states. [2020-10-27 01:31:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:01,825 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-27 01:31:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:31:01,826 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 103 [2020-10-27 01:31:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:01,827 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:31:01,827 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:31:01,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:31:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:31:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 01:31:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:31:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-27 01:31:01,832 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2020-10-27 01:31:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:01,832 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-27 01:31:01,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:31:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-27 01:31:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:31:01,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:01,833 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:01,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:31:01,833 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:01,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1283495077, now seen corresponding path program 46 times [2020-10-27 01:31:01,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:01,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486637507] [2020-10-27 01:31:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:01,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:02,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:06,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:06,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 01:31:06,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:06,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4216 [2020-10-27 01:31:06,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:31:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:31:06,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:07,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:07,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:07,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:07,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:07,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:07,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:07,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:07,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:07,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:07,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:07,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:07,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486637507] [2020-10-27 01:31:07,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:07,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:31:07,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557051121] [2020-10-27 01:31:07,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:31:07,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:07,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:31:07,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:31:07,931 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 50 states. [2020-10-27 01:31:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:08,380 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 01:31:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:31:08,381 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 105 [2020-10-27 01:31:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:08,382 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:31:08,382 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:31:08,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:31:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:31:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 01:31:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 01:31:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-27 01:31:08,389 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2020-10-27 01:31:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:08,390 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-27 01:31:08,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:31:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-27 01:31:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 01:31:08,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:08,391 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:08,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:31:08,391 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1076077927, now seen corresponding path program 47 times [2020-10-27 01:31:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:08,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912119131] [2020-10-27 01:31:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:08,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:08,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:12,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4552 [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 01:31:12,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:14,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:14,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:14,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:14,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:14,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:14,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:14,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:14,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912119131] [2020-10-27 01:31:14,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:14,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:31:14,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786843440] [2020-10-27 01:31:14,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:31:14,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:14,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:31:14,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:31:14,932 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 51 states. [2020-10-27 01:31:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:15,384 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-27 01:31:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:31:15,384 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 107 [2020-10-27 01:31:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:15,386 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:31:15,386 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:31:15,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:31:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:31:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 01:31:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 01:31:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-10-27 01:31:15,392 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2020-10-27 01:31:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:15,393 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-10-27 01:31:15,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:31:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-10-27 01:31:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 01:31:15,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:15,394 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:15,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:31:15,394 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:15,394 INFO L82 PathProgramCache]: Analyzing trace with hash 683307607, now seen corresponding path program 48 times [2020-10-27 01:31:15,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:15,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682282938] [2020-10-27 01:31:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:15,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:20,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:20,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 01:31:20,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:20,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4643 [2020-10-27 01:31:20,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:31:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:31:20,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:21,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:21,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:21,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:21,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682282938] [2020-10-27 01:31:21,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:21,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:31:21,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597031552] [2020-10-27 01:31:21,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:31:21,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:21,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:31:21,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:31:21,994 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 52 states. [2020-10-27 01:31:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:22,424 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-27 01:31:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:31:22,425 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 109 [2020-10-27 01:31:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:22,426 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:31:22,427 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:31:22,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:31:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:31:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 01:31:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:31:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-10-27 01:31:22,433 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2020-10-27 01:31:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:22,433 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-10-27 01:31:22,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:31:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-10-27 01:31:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 01:31:22,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:22,434 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:22,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:31:22,434 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash -764308843, now seen corresponding path program 49 times [2020-10-27 01:31:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:22,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848357665] [2020-10-27 01:31:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:22,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:22,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:26,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:26,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 01:31:26,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:26,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4461 [2020-10-27 01:31:26,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:31:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 01:31:26,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:28,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:28,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:28,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:28,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:28,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848357665] [2020-10-27 01:31:28,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:28,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:31:28,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100796290] [2020-10-27 01:31:28,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:31:28,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:28,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:31:28,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:31:28,981 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 53 states. [2020-10-27 01:31:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:29,406 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-27 01:31:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:31:29,407 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 111 [2020-10-27 01:31:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:29,408 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:31:29,409 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:31:29,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:31:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:31:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 01:31:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:31:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2020-10-27 01:31:29,414 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2020-10-27 01:31:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:29,415 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2020-10-27 01:31:29,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:31:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2020-10-27 01:31:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 01:31:29,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:29,416 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:29,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:31:29,416 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -354313389, now seen corresponding path program 50 times [2020-10-27 01:31:29,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:29,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37926331] [2020-10-27 01:31:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:29,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:34,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4904 [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:31:34,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:36,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:36,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:36,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:36,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:36,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:36,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:36,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37926331] [2020-10-27 01:31:36,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:36,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:31:36,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139357071] [2020-10-27 01:31:36,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:31:36,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:31:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:31:36,481 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 54 states. [2020-10-27 01:31:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:36,748 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-27 01:31:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:31:36,749 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 113 [2020-10-27 01:31:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:36,750 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:31:36,750 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:31:36,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:31:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:31:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 01:31:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 01:31:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-27 01:31:36,756 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2020-10-27 01:31:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:36,756 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-27 01:31:36,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:31:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-27 01:31:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 01:31:36,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:36,757 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:36,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:31:36,757 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:36,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1485673327, now seen corresponding path program 51 times [2020-10-27 01:31:36,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:36,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090772066] [2020-10-27 01:31:36,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:37,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:41,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4975 [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 01:31:41,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:43,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:43,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:43,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:43,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090772066] [2020-10-27 01:31:43,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:43,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 01:31:43,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354905205] [2020-10-27 01:31:43,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 01:31:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:43,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 01:31:43,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:31:43,957 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 55 states. [2020-10-27 01:31:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:44,369 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-27 01:31:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 01:31:44,369 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 115 [2020-10-27 01:31:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:44,371 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:31:44,371 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:31:44,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:31:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:31:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 01:31:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:31:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-27 01:31:44,377 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2020-10-27 01:31:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:44,377 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-27 01:31:44,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 01:31:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-27 01:31:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:31:44,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:44,378 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:44,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:31:44,379 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:44,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2095847857, now seen corresponding path program 52 times [2020-10-27 01:31:44,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:44,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101248476] [2020-10-27 01:31:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:44,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:45,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:49,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4929 [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 01:31:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:51,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:51,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:51,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101248476] [2020-10-27 01:31:51,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:51,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 01:31:51,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573493118] [2020-10-27 01:31:51,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 01:31:51,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 01:31:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:31:51,607 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 56 states. [2020-10-27 01:31:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:52,093 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-27 01:31:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:31:52,093 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 117 [2020-10-27 01:31:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:52,094 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:31:52,094 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:31:52,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:31:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:31:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 01:31:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:31:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-10-27 01:31:52,100 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2020-10-27 01:31:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:52,100 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-10-27 01:31:52,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 01:31:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-10-27 01:31:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 01:31:52,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:52,101 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:52,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:31:52,102 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash -63051635, now seen corresponding path program 53 times [2020-10-27 01:31:52,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:52,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049507762] [2020-10-27 01:31:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:52,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:57,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 01:31:57,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:59,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:59,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:59,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:59,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:59,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:59,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:59,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:59,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:59,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:59,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049507762] [2020-10-27 01:31:59,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:59,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 01:31:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736033812] [2020-10-27 01:31:59,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 01:31:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 01:31:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:31:59,448 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 57 states. [2020-10-27 01:31:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:59,752 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-27 01:31:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 01:31:59,753 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 119 [2020-10-27 01:31:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:59,754 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:31:59,754 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:31:59,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:31:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:31:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 01:31:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:31:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-10-27 01:31:59,760 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2020-10-27 01:31:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:59,760 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-10-27 01:31:59,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 01:31:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-10-27 01:31:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 01:31:59,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:59,761 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:59,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:31:59,761 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash -756001973, now seen corresponding path program 54 times [2020-10-27 01:31:59,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:59,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968518172] [2020-10-27 01:31:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:59,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:04,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4807 [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 01:32:04,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:07,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:07,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:07,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:07,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:07,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:07,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:07,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:07,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:07,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:07,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968518172] [2020-10-27 01:32:07,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:07,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 01:32:07,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560592871] [2020-10-27 01:32:07,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 01:32:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 01:32:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:32:07,023 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 58 states. [2020-10-27 01:32:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:07,508 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-27 01:32:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 01:32:07,508 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 121 [2020-10-27 01:32:07,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:07,510 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:32:07,510 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:32:07,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:32:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:32:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 01:32:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:32:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-10-27 01:32:07,515 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2020-10-27 01:32:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:07,516 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-10-27 01:32:07,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 01:32:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-10-27 01:32:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 01:32:07,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:07,517 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:07,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:32:07,517 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash -961345911, now seen corresponding path program 55 times [2020-10-27 01:32:07,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:07,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379505009] [2020-10-27 01:32:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:12,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 01:32:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:15,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:15,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:15,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:15,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:15,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:15,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:15,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:15,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:15,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379505009] [2020-10-27 01:32:15,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:15,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 01:32:15,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168124246] [2020-10-27 01:32:15,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 01:32:15,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 01:32:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:32:15,093 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 59 states. [2020-10-27 01:32:15,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:15,409 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-27 01:32:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 01:32:15,410 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 123 [2020-10-27 01:32:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:15,412 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:32:15,412 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:32:15,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:32:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:32:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 01:32:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:32:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-10-27 01:32:15,417 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2020-10-27 01:32:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:15,418 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-10-27 01:32:15,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 01:32:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-10-27 01:32:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 01:32:15,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:15,419 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:15,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:32:15,419 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:15,420 INFO L82 PathProgramCache]: Analyzing trace with hash -728374713, now seen corresponding path program 56 times [2020-10-27 01:32:15,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:15,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124082781] [2020-10-27 01:32:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 01:32:20,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:23,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:23,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:23,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:23,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:23,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:23,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:23,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124082781] [2020-10-27 01:32:23,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:23,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 01:32:23,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195888770] [2020-10-27 01:32:23,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 01:32:23,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 01:32:23,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:32:23,100 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 60 states. [2020-10-27 01:32:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:23,565 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-27 01:32:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 01:32:23,565 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 125 [2020-10-27 01:32:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:23,567 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:32:23,567 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:32:23,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:32:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:32:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-27 01:32:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 01:32:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-10-27 01:32:23,573 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2020-10-27 01:32:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:23,573 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-10-27 01:32:23,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 01:32:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-10-27 01:32:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 01:32:23,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:23,574 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:23,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:32:23,574 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash -181352827, now seen corresponding path program 57 times [2020-10-27 01:32:23,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:23,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354363958] [2020-10-27 01:32:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:23,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:28,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:28,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 01:32:28,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:28,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:32:28,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 01:32:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 01:32:28,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:31,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:31,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:31,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:31,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:31,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:31,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:31,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:31,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:31,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:31,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:31,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:31,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354363958] [2020-10-27 01:32:31,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:31,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 01:32:31,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858137989] [2020-10-27 01:32:31,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 01:32:31,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 01:32:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:32:31,234 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 61 states. [2020-10-27 01:32:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:31,639 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-27 01:32:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 01:32:31,640 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 127 [2020-10-27 01:32:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:31,641 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:32:31,642 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:32:31,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:32:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:32:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-27 01:32:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:32:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2020-10-27 01:32:31,648 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2020-10-27 01:32:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:31,648 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2020-10-27 01:32:31,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 01:32:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2020-10-27 01:32:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 01:32:31,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:31,650 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:31,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:32:31,650 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1520669507, now seen corresponding path program 58 times [2020-10-27 01:32:31,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:31,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815371251] [2020-10-27 01:32:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:31,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:32,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:36,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:36,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 01:32:36,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:32:36,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 01:32:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 01:32:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:39,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:39,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:39,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:39,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:39,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815371251] [2020-10-27 01:32:39,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:39,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 01:32:39,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237298006] [2020-10-27 01:32:39,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 01:32:39,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 01:32:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 01:32:39,517 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 62 states. [2020-10-27 01:32:40,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:40,041 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-27 01:32:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 01:32:40,042 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 129 [2020-10-27 01:32:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:40,043 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:32:40,043 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:32:40,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 01:32:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:32:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-27 01:32:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:32:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-10-27 01:32:40,047 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2020-10-27 01:32:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:40,047 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-10-27 01:32:40,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 01:32:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-10-27 01:32:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 01:32:40,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:40,048 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:40,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:32:40,048 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 781592705, now seen corresponding path program 59 times [2020-10-27 01:32:40,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:40,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271529805] [2020-10-27 01:32:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:41,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:45,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 01:32:45,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:45,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:32:45,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 01:32:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 01:32:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0